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Ethereum “Dagger” PoW function is flawed (technical off-topic) Development & Technical Discussion
Our updates:1. The problem that I have with scrypt or SeqMemoHash is that they a…
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n/a | Sergio_Demian_Lerner | January 22, 2014, 10:23:51 AM |
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ASIC-resistant hashing for altcoins Mining (Altcoins)
I'm working on a PoW hashing function called RandMemoHash (http://bitslog.wordpr…
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n/a | Sergio_Demian_Lerner | January 21, 2014, 03:01:48 PM |
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Ethereum “Dagger” PoW function is flawed Altcoin Discussion
This forum is full of spam. I will repost it on the thread https://bitcointalk.o…
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n/a | Sergio_Demian_Lerner | January 17, 2014, 02:11:21 PM |
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Ethereum “Dagger” PoW function is flawed (technical off-topic) Development & Technical Discussion
One of the features in Ethereum is the use of a PoW function specially designed…
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n/a | Sergio_Demian_Lerner | January 17, 2014, 02:11:05 PM |
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Ethereum “Dagger” PoW function is flawed Altcoin Discussion
One of the features in Ethereum is the use of a PoW function specially designed…
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n/a | Sergio_Demian_Lerner | January 17, 2014, 12:21:26 PM |
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Block orphans/day? Development & Technical Discussion
For blockchain.info orphan == stale(definition in https://blockchain.info/orphan…
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n/a | Sergio_Demian_Lerner | January 10, 2014, 09:09:58 AM |
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Block orphans/day? Development & Technical Discussion
Does anyone know a web page which shows a live statistic of the number of orphan…
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n/a | Sergio_Demian_Lerner | January 07, 2014, 09:57:11 PM |
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Should nodes receive part of the transaction fee? Development & Technical Discussion
I proposed two protocols that work, without any theoretical problem, and with ve…
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n/a | Sergio_Demian_Lerner | January 02, 2014, 12:36:51 PM |
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How can relay nodes be rewarded? Development & Technical Discussion
In a state of the system where the block reward has reached zero, the following…
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n/a | Sergio_Demian_Lerner | December 26, 2013, 01:16:46 PM |
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How can relay nodes be rewarded? Development & Technical Discussion
Here is an idea that can reward transaction forwarders as long as the block rewa…
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n/a | Sergio_Demian_Lerner | December 26, 2013, 12:35:07 PM |
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Bitcoin source from November 2008. Development & Technical Discussion
I also have these files, sent to me by one of the early reviewers of the code.An…
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n/a | Sergio_Demian_Lerner | December 23, 2013, 06:44:15 PM |
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BitcoinJ node count? Development & Technical Discussion
I checked the page http://luke.dashjr.org/programs/bitcoin/files/charts/security…
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n/a | Sergio_Demian_Lerner | December 20, 2013, 01:08:16 PM |
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P2PTradeX revisted Development & Technical Discussion
Re-thinking: In TierNolan's protocol, the attacker could include in the fork ma…
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n/a | Sergio_Demian_Lerner | December 13, 2013, 09:54:16 AM |
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P2PTradeX revisted Development & Technical Discussion
Isn't it the case that the other coin-swapping protocols are susceptible to this…
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n/a | Sergio_Demian_Lerner | December 13, 2013, 09:40:31 AM |
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P2PTradeX revisted Development & Technical Discussion
A better analysis:Suppose that the proof length is k=6 and that each block can c…
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n/a | Sergio_Demian_Lerner | December 11, 2013, 11:22:00 AM |
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P2PTradeX revisted Development & Technical Discussion
I came up with an attack on my P2PTradeX protocol (https://bitcointalk.org/index…
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n/a | Sergio_Demian_Lerner | December 11, 2013, 09:40:40 AM |
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bitcoins with homomorphic value (validatable but encrypted) Development & Technical Discussion
I don't have the best idea. No one can claim to have the best idea. But I'm unsu…
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n/a | Sergio_Demian_Lerner | November 29, 2013, 04:17:15 PM |
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bitcoins with homomorphic value (validatable but encrypted) Development & Technical Discussion
I think eg if you read the original zercoin paper and I said similar things on b…
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n/a | Sergio_Demian_Lerner | November 27, 2013, 08:53:48 AM |
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bitcoins with homomorphic value (validatable but encrypted) Development & Technical Discussion
Ouch .... but it crossed my mind also.So Sergio are you ever going to publish? H…
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n/a | Sergio_Demian_Lerner | November 27, 2013, 08:33:56 AM |
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bitcoins with homomorphic value (validatable but encrypted) Development & Technical Discussion
All these problems, like hiding the transfer amount , and anonymization, etc wer…
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n/a | Sergio_Demian_Lerner | November 27, 2013, 04:36:21 AM |
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New Mystery about Satoshi Development & Technical Discussion
New evidence of the non-existent connection between Satoshi and DPR:http://bitsl…
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n/a | Sergio_Demian_Lerner | November 26, 2013, 02:12:34 PM |
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New Mystery about Satoshi Development & Technical Discussion
(Also posted on reddit)From the "paper":"The Bitcoin community believes [9] that…
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n/a | Sergio_Demian_Lerner | November 26, 2013, 09:41:26 AM |
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How much slower is a big block propagating than a small block? Development & Technical Discussion
See: http://www.tik.ee.ethz.ch/file/49318d3f56c1d525aabf7fda78b23fc0/P2P2013_04…
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n/a | Sergio_Demian_Lerner | November 05, 2013, 09:27:04 AM |
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New Mystery about Satoshi Development & Technical Discussion
And I don't think SHA-256 was broken. The simpler explanation is that Satoshi di…
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n/a | Sergio_Demian_Lerner | November 04, 2013, 09:52:59 AM |
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New Mystery about Satoshi Development & Technical Discussion
My current thought on the matter :32 zerobits / 10 min , 4.2 Ghash/block● Satosh…
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n/a | Sergio_Demian_Lerner | November 04, 2013, 09:46:59 AM |
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Majority is not Enough: Bitcoin Mining is Vulnerable Development & Technical Discussion
I have no time to read carefully the paper but..Some time ago I posted in http:/…
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n/a | Sergio_Demian_Lerner | November 04, 2013, 09:10:03 AM |
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CoinSwap: Transaction graph disjoint trustless trading Development & Technical Discussion
Possible vector of attack: If Carol does not give Alice a newly generated public…
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n/a | Sergio_Demian_Lerner | October 30, 2013, 01:24:23 PM |
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CoinSwap: Transaction graph disjoint trustless trading. Development & Technical Discussion
I love the diagram. This must go right to the wiki.
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n/a | Sergio_Demian_Lerner | October 30, 2013, 08:44:21 AM |
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Idea for a mixer that can't run with your coins Development & Technical Discussion
I was thinking that the same can be accomplished by the protocol socrates1024 de…
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n/a | Sergio_Demian_Lerner | October 29, 2013, 09:26:59 AM |
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Idea for a mixer that can't run with your coins Development & Technical Discussion
Interesting protocol, I will analyze more carefully. I suppose the retep version…
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n/a | Sergio_Demian_Lerner | October 29, 2013, 08:43:00 AM |
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Momentum Proof-of-Work Bounty - 30 BTC Project Development
bytemaster: Your idea of using hash collisions is good, but is not new!I propose…
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n/a | Sergio_Demian_Lerner | October 20, 2013, 09:20:06 PM |
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Proof of Storage to make distributed resource consumption costly. Development & Technical Discussion
Note I invented Proof-of-Harddrive in my Bitcoin : The Digital Kill Switch threa…
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n/a | Sergio_Demian_Lerner | October 17, 2013, 07:53:53 AM |
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Proof of Storage to make distributed resource consumption costly. Development & Technical Discussion
side-topic: Also a node could prioritize nodes which store the full block-chain.…
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n/a | Sergio_Demian_Lerner | October 16, 2013, 07:49:16 AM |
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Proof of Storage to make distributed resource consumption costly. Development & Technical Discussion
Gmaxwell: Your idea is excellent, but needs some changes to prevent an obvious q…
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n/a | Sergio_Demian_Lerner | October 15, 2013, 08:36:36 AM |
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Alt chains and atomic transfers Development & Technical Discussion
This socrates1024 protocol seems to be much better than some others I saw. I can…
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n/a | Sergio_Demian_Lerner | October 10, 2013, 03:36:59 PM |
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Soft-fork Proposal: allow nLockTime specify an UPPER limit instead of lower lim. Development & Technical Discussion
Soft-fork Proposal: allow nLockTime specify an UPPER limit instead of lower lim. by Sergio_Demian_Lerner
In the thread https://bitcointalk.org/index.php?topic=307211.0 I propose a metho…
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n/a | Sergio_Demian_Lerner | October 09, 2013, 06:01:10 PM |
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How to use fiat currencies for Bitcoin offline transactions? Bitcoin Discussion
I posted more thoughts about the btcusr idea (which I named BitBanknotes, so it…
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n/a | Sergio_Demian_Lerner | October 09, 2013, 05:15:59 PM |
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Isn't the output of SHA256 *slightly* too big to use for a private key? Development & Technical Discussion
So, do brainwallet.org or any of the other brainwallet sites reject pass phrases…
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n/a | Sergio_Demian_Lerner | October 09, 2013, 02:24:05 PM |
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Making Hot Wallets Impossible to Steal - Now with 5 BTC bounty Development & Technical Discussion
Informal Proof: As you see, any payment that goes out from Txo MUST go through a…
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n/a | Sergio_Demian_Lerner | October 09, 2013, 02:20:33 PM |
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Making Hot Wallets Impossible to Steal - Now with 5 BTC bounty Development & Technical Discussion
The "Tick" methodLet's say you have X BTC divided in N transaction outputs Txo(i…
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n/a | Sergio_Demian_Lerner | October 09, 2013, 02:16:02 PM |
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Making Hot Wallets Impossible to Steal - Now with 5 BTC bounty Development & Technical Discussion
I say it's possible to achieve similar properties with simple methods, but requi…
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n/a | Sergio_Demian_Lerner | October 09, 2013, 09:00:33 AM |
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How to use fiat currencies for Bitcoin offline transactions? Bitcoin Discussion
This is an awesome idea! Problem is, I don't think there is enough proximity bet…
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n/a | Sergio_Demian_Lerner | October 09, 2013, 08:40:07 AM |
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How to use fiat currencies for Bitcoin offline transactions? Bitcoin Discussion
Sergio:is there any way to redeem the note for BTC in your scheme? ... (also do…
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n/a | Sergio_Demian_Lerner | October 09, 2013, 08:37:22 AM |
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How to use fiat currencies for Bitcoin offline transactions? Bitcoin Discussion
The core idea, that a difficult to counterfeit banknote can be used for off-line…
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n/a | Sergio_Demian_Lerner | October 08, 2013, 06:25:09 PM |
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How to use fiat currencies for Bitcoin offline transactions? Bitcoin Discussion
One this we must standardize from time 0 is that a USD banknote with value N mus…
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n/a | Sergio_Demian_Lerner | October 09, 2013, 08:26:39 AM |
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How to use fiat currencies for Bitcoin offline transactions? Bitcoin Discussion
One issue I see is, with bitcoins (10 BTC) transfered to a bank note ($100), now…
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n/a | Sergio_Demian_Lerner | October 09, 2013, 07:52:26 AM |
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How to use fiat currencies for Bitcoin offline transactions? Bitcoin Discussion
POLLI would like people to vote if they would accept such a BTC banknote (if the…
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n/a | Sergio_Demian_Lerner | October 08, 2013, 06:29:36 PM |
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Just thinking aloud Development & Technical Discussion
Are you talking about something like Firmcoin.com ?It´s the true digital equival…
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n/a | Sergio_Demian_Lerner | September 28, 2013, 11:19:12 AM |
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Poker and the shared pot at the table in a decentralised network Development & Technical Discussion
QixCoin is salable and performant (the block-chain is NOT cluttered with ZNPs).…
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n/a | Sergio_Demian_Lerner | September 25, 2013, 09:06:26 AM |
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Poker and the shared pot at the table in a decentralised network Development & Technical Discussion
Well, that's interesting! Looking forward to seeing what you come up with Sergio…
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n/a | Sergio_Demian_Lerner | September 23, 2013, 11:18:54 AM |
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Poker and the shared pot at the table in a decentralised network Development & Technical Discussion
For an update on the feasibility of online p2p poker, I'm working on QixCoin.co…
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n/a | Sergio_Demian_Lerner | September 23, 2013, 10:40:45 AM |
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Need help to get raw block data to analyze orphan rates variation over time Development & Technical Discussion
Hi!I want to analyze how orphan rates have changed over time, under very differe…
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n/a | Sergio_Demian_Lerner | September 18, 2013, 06:40:25 AM |
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New Mystery about Satoshi Development & Technical Discussion
I think deepceleron was right, as this image proves it:This is the same image as…
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n/a | Sergio_Demian_Lerner | September 04, 2013, 05:08:26 PM |
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New Mystery about Satoshi Development & Technical Discussion
What do you mean "difference"? I'm talking about this:There are the 6 values I'v…
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n/a | Sergio_Demian_Lerner | September 03, 2013, 03:31:05 PM |
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New Mystery about Satoshi Development & Technical Discussion
There were long gaps in 2009 when no blocks were mined at all despite min diffic…
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n/a | Sergio_Demian_Lerner | September 03, 2013, 01:43:17 PM |
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New Mystery about Satoshi Development & Technical Discussion
The probability of 10/59 machines being broken and having consecutive numbers is…
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n/a | Sergio_Demian_Lerner | September 03, 2013, 08:47:46 AM |
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New Mystery about Satoshi Development & Technical Discussion
I like the explanation given by eyal0 here http://de.reddit.com/r/Bitcoin/commen…
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n/a | Sergio_Demian_Lerner | September 03, 2013, 08:21:21 AM |
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New Mystery about Satoshi Development & Technical Discussion
Please forgive me for posting a blog link, but the post has many images and it r…
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n/a | Sergio_Demian_Lerner | September 03, 2013, 01:55:42 AM |
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A mistery hidden in the Genesis Block Development & Technical Discussion
Sergio, if you are still around, have you investigated this anymore and if so wh…
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n/a | Sergio_Demian_Lerner | September 02, 2013, 11:37:42 PM |
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Tatsuaki Okamoto = Satoshi Nakamoto? Bitcoin Discussion
It's completely impossible that Satoshi is kept anonymous forever.I don't want h…
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n/a | Sergio_Demian_Lerner | August 25, 2013, 08:47:29 AM |
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Firmcoins - A new kind of Bitcoin physical bill ready for off-line transactions Development & Technical Discussion
Firmcoins - A new kind of Bitcoin physical bill ready for off-line transactions by Sergio_Demian_Lerner
I know you guys are going to extreme lengths to keep people from 'cracking' thes…
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n/a | Sergio_Demian_Lerner | August 18, 2013, 09:40:07 AM |
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Firmcoins - A new kind of Bitcoin physical bill ready for off-line transactions Development & Technical Discussion
Firmcoins - A new kind of Bitcoin physical bill ready for off-line transactions by Sergio_Demian_Lerner
What is the purpose of the hologram sticker?Add still another layer of physical…
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n/a | Sergio_Demian_Lerner | August 16, 2013, 06:08:55 AM |
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fastblockrelay Development & Technical Discussion
Check this proposal, which I think is almost exactly that you propose: Increasin…
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n/a | Sergio_Demian_Lerner | August 13, 2013, 11:32:33 AM |
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Information Eclipsing and the 49.1% Attack... some short term solutions? Development & Technical Discussion
Two little additional tweaks:- Mining blocks of type B give you a 50% percent le…
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n/a | Sergio_Demian_Lerner | August 13, 2013, 11:08:25 AM |
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Information Eclipsing and the 49.1% Attack... some short term solutions? Development & Technical Discussion
Interesting paper, although I have only read the conclusions. But this is how I…
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n/a | Sergio_Demian_Lerner | August 13, 2013, 09:48:43 AM |
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10X Faster Vanity addresses (P2SH/M) Development & Technical Discussion
Note that with Luke-Jr patch https://github.com/samr7/vanitygen/pull/10 of the v…
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n/a | Sergio_Demian_Lerner | August 04, 2013, 07:31:59 AM |
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Best Way to Power an ASIC / Free Power ? Hardware
What about using the wasted electricity to heat your shower water? Or to cook?
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n/a | Sergio_Demian_Lerner | July 24, 2013, 07:47:01 PM |
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What is up with this SIGHASH_SINGLE and nOut out of range? Development & Technical Discussion
BTW, we should be happy Satoshi choose 1 as the error code and not 0, because 0…
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n/a | Sergio_Demian_Lerner | July 24, 2013, 07:44:07 PM |
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What is up with this SIGHASH_SINGLE and nOut out of range? Development & Technical Discussion
yeah it returns one, but the tx is still valid in the blockchain. i know it's a…
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n/a | Sergio_Demian_Lerner | July 24, 2013, 03:44:05 PM |
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Vanitygen: Vanity bitcoin address generator/miner [v0.22] Development & Technical Discussion
A bitcoin miner is computationally nothing like an address generator.No, this is…
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n/a | Sergio_Demian_Lerner | July 24, 2013, 03:53:44 PM |
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Attack against some P2P coin mixing schemes Development & Technical Discussion |
n/a | Sergio_Demian_Lerner | July 22, 2013, 10:03:36 AM |
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A question on ECDSA signing (more efficient tx signing)? Development & Technical Discussion
If you were willing to do the composed-key signing— you could instead have just…
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n/a | Sergio_Demian_Lerner | July 22, 2013, 08:59:47 AM |
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Quiz: Are you a Satoshi client guru developer? Development & Technical Discussion
If you think you are, then you should tell the difference between all the possib…
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n/a | Sergio_Demian_Lerner | July 19, 2013, 04:44:23 PM |
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Buggy CVE-2013-4627 patch, open new vectors of attack Development & Technical Discussion
My proposals to reduce this kinds of risks are:- Make non-compact Var_ints non-s…
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n/a | Sergio_Demian_Lerner | July 19, 2013, 03:33:22 PM |
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Buggy CVE-2013-4627 patch, open new vectors of attack Development & Technical Discussion
After talking with the core dev about this issue, their opinion is that this is…
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n/a | Sergio_Demian_Lerner | July 19, 2013, 01:40:48 PM |
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Testing so that opcodes can be re-enabled Development & Technical Discussion
I have the following proposal: Why don't we schedule a hard fork for 2014 to ena…
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n/a | Sergio_Demian_Lerner | July 15, 2013, 07:59:07 AM |
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10X Faster Vanity addresses (P2SH/M) Development & Technical Discussion
For option 2 do you mean the nonce would be something like HASH(1), HASH(2), HAS…
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n/a | Sergio_Demian_Lerner | July 14, 2013, 08:00:23 AM |
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10X Faster Vanity addresses (P2SH/M) Development & Technical Discussion
Sure, thats how luke generated that 3P14159 address... but kinda lame in that it…
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n/a | Sergio_Demian_Lerner | July 14, 2013, 08:05:23 AM |
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Firmcoins - A new kind of Bitcoin physical bill ready for off-line transactions Development & Technical Discussion
Firmcoins - A new kind of Bitcoin physical bill ready for off-line transactions by Sergio_Demian_Lerner
so how do you flash check the chip to verify that it is not been corrupted or 2x…
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n/a | Sergio_Demian_Lerner | July 14, 2013, 07:54:55 AM |
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Testing so that opcodes can be re-enabled Development & Technical Discussion
We have a way of establishing the severity of a vuln: the severity field (https:…
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n/a | Sergio_Demian_Lerner | July 14, 2013, 07:49:04 AM |
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Firmcoins - A new kind of Bitcoin physical bill ready for off-line transactions Development & Technical Discussion
Firmcoins - A new kind of Bitcoin physical bill ready for off-line transactions by Sergio_Demian_Lerner
Excellent.Thanks!First thought, how secure is the key generation in this? I'm th…
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n/a | Sergio_Demian_Lerner | July 11, 2013, 05:20:30 PM |
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Testing so that opcodes can be re-enabled Development & Technical Discussion
That means instead of just researching and reporting DoS vulnerabilities or bugs…
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n/a | Sergio_Demian_Lerner | July 13, 2013, 07:57:47 AM |
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Testing so that opcodes can be re-enabled Development & Technical Discussion
]There have been plenty of DoS bugs you didn't spot. Yes I know. I apologize fo…
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n/a | Sergio_Demian_Lerner | July 13, 2013, 09:31:19 AM |
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Which clients fully support P2SH and/or multisig ? Development & Technical Discussion
Thank you mandros for taking the time to research on this.
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n/a | Sergio_Demian_Lerner | July 13, 2013, 08:03:06 AM |
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10X Faster Vanity addresses (P2SH/M) Development & Technical Discussion
I was researching how to improve the speed of generating vanity addresses and I…
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n/a | Sergio_Demian_Lerner | July 12, 2013, 04:49:44 PM |
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10X Faster Vanity addresses (P2SH/M) Development & Technical Discussion
Note that with Luke-Jr patch https://github.com/samr7/vanitygen/pull/10 of the v…
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n/a | Sergio_Demian_Lerner | July 12, 2013, 05:23:46 PM |
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Testing so that opcodes can be re-enabled Development & Technical Discussion
I have a hundred ideas of marvelous futuristic things that could be done with a…
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n/a | Sergio_Demian_Lerner | July 12, 2013, 05:05:57 PM |
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Which clients fully support P2SH and/or multisig ? Development & Technical Discussion
I'm reading Satoshi client code and Bitcoinj code. It seems to me that Satoshi s…
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n/a | Sergio_Demian_Lerner | July 12, 2013, 12:57:22 PM |
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Zerocoin when? Development & Technical Discussion
I hope next week I will publish my two years late AppeCoin paper. Appecoin is ev…
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n/a | Sergio_Demian_Lerner | July 09, 2013, 11:13:08 AM |
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Firmcoins - A new kind of Bitcoin physical bill ready for off-line transactions Development & Technical Discussion
Firmcoins - A new kind of Bitcoin physical bill ready for off-line transactions by Sergio_Demian_Lerner
I am at a loss to figure out what makes Firmcoins special compared to smart card…
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n/a | Sergio_Demian_Lerner | July 09, 2013, 11:00:49 AM |
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Firmcoins - A new kind of Bitcoin physical bill ready for off-line transactions Development & Technical Discussion
Firmcoins - A new kind of Bitcoin physical bill ready for off-line transactions by Sergio_Demian_Lerner
That is pretty cool. It says 1BTC on it, so does that mean the intention is for…
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n/a | Sergio_Demian_Lerner | July 09, 2013, 10:50:34 AM |
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Proposal: Simple modification for better anonymity Development & Technical Discussion
Also check this 4 solutions for the same problem:1- [PROPOSAL] Untrackable addre…
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n/a | Sergio_Demian_Lerner | June 29, 2013, 10:00:43 AM |
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Proposal: Mini-blocks for network split detection Development & Technical Discussion
Last week I read in a thread about how mini-blocks (blocks with less PoW generat…
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n/a | Sergio_Demian_Lerner | June 29, 2013, 09:48:15 AM |
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Eternal Choice for the Dark Side Attack (ECDSA) and the Safe Mode solution Development & Technical Discussion
I've changed the post to include gmaxwell explanation about why my solution just…
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n/a | Sergio_Demian_Lerner | June 27, 2013, 05:59:25 PM |
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Eternal Choice for the Dark Side Attack (ECDSA) and the Safe Mode solution Development & Technical Discussion
I absolutely fucking despise people that use these forums to promote their shitt…
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n/a | Sergio_Demian_Lerner | June 27, 2013, 08:40:47 AM |
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Eternal Choice for the Dark Side Attack (ECDSA) and the Safe Mode solution Development & Technical Discussion
I would like to share my post in my blog relating a society-engineering/technica…
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n/a | Sergio_Demian_Lerner | June 26, 2013, 09:26:23 AM |
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Protocols for preventing subliminal channels in hardware wallets Hardware wallets
This is my last post about Firmcoin, regarding how to prevent covert channels wh…
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n/a | Sergio_Demian_Lerner | June 20, 2013, 06:51:47 PM |
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Firmcoins - A new kind of Bitcoin physical bill ready for off-line transactions Development & Technical Discussion
Firmcoins - A new kind of Bitcoin physical bill ready for off-line transactions by Sergio_Demian_Lerner
QuoteWhen requested, a Firmcoin will send you its Bitcoin private key, but will…
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n/a | Sergio_Demian_Lerner | June 15, 2013, 07:02:37 AM |
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Firmcoins - A new kind of Bitcoin physical bill ready for off-line transactions Development & Technical Discussion
Firmcoins - A new kind of Bitcoin physical bill ready for off-line transactions by Sergio_Demian_Lerner
So as silly as the post looked, benjamindees made a good point. "Request privat…
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n/a | Sergio_Demian_Lerner | June 14, 2013, 04:33:51 PM |
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Firmcoins - A new kind of Bitcoin physical bill ready for off-line transactions Development & Technical Discussion
Firmcoins - A new kind of Bitcoin physical bill ready for off-line transactions by Sergio_Demian_Lerner
For a higher security level, you can carry with you the UXTO set of the day befo…
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n/a | Sergio_Demian_Lerner | June 14, 2013, 01:01:22 PM |
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