| Content | Score | Started by | Date posted | ||
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Codex32 Development & Technical Discussion |
n/a | andytoshi | August 11, 2023, 02:53:35 PM |
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How to build a virtual blockchain on top of a Bitcoin blockchain Development & Technical Discussion
Have you heard of sidechains?
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n/a | andytoshi | November 22, 2020, 03:58:02 PM |
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How is a public key calculated from a private key using ecc? Development & Technical Discussion
Not to detract from the main point, but if you were implementing this multiplica…
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n/a | andytoshi | October 02, 2018, 09:03:25 AM |
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Open Timestamps integration in to Bitcoin Development & Technical Discussion
There are OTS libraries for Python, Java, Javascript and Rust. See https://opent…
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n/a | andytoshi | October 01, 2018, 02:24:28 PM |
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Anonymous Atomic Swaps Using Homomorphic Hashing Development & Technical Discussion
QuoteIt is not possible to do a cross-chain atomic swap with only two transactio…
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n/a | andytoshi | September 01, 2018, 08:39:06 PM |
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Anonymous Atomic Swaps Using Homomorphic Hashing Development & Technical Discussion
You can do adaptor-signature based atomic swaps in Bitcoin without Schnorr; see…
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n/a | andytoshi | September 01, 2018, 10:13:52 AM |
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FRAGMENTED BACKUPS VULNERABILITY!! IF YOU USE THEM, READ THIS!! Armory
There are two things should be random in SSS. The coefficients of the polynomia…
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n/a | andytoshi | September 25, 2017, 11:53:00 AM |
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I have a cryptocurrency idea, where do I get started? Altcoin Discussion
What is your idea? There is a good chance you can just build it on top of Bitcoi…
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n/a | andytoshi | May 31, 2017, 09:10:37 AM |
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When can Mimblewimble be implemented? Development & Technical Discussion
So.... it looks like finally MimbleWimble will move away from Bitcoin and may…
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n/a | andytoshi | May 26, 2017, 10:13:24 AM |
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implicit cost of pegged sidechains Development & Technical Discussion
...every coin on Alpha is 100% backed by a locked coin on testnet, and using the…
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n/a | andytoshi | September 26, 2016, 03:09:02 PM |
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implicit cost of pegged sidechains Development & Technical Discussion
When the government of Argentina says they're going to peg the peso to the US do…
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n/a | andytoshi | September 26, 2016, 11:33:01 AM |
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Mimblewimble Paper Proposes ‘Near Complete’ Bitcoin Anonymity Bitcoin Discussion
What kind of blockchain analysis could one reasonably expect with this scheme? I…
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n/a | andytoshi | August 21, 2016, 05:05:35 PM |
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Mimblewimble Paper Proposes ‘Near Complete’ Bitcoin Anonymity Bitcoin Discussion
andytoshi,the "paper" actually saysQuoteThen, tovalidate the entire chain, users…
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n/a | andytoshi | August 07, 2016, 02:25:29 PM |
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Mimblewimble Paper Proposes ‘Near Complete’ Bitcoin Anonymity Bitcoin Discussion
I value legit anonymity for many reasons.... but coming on the heels of a major…
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n/a | andytoshi | August 07, 2016, 11:12:06 AM |
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When can Mimblewimble be implemented? Development & Technical Discussion
Because MimbleWimble doesn't support Bitcoin script, it supports far less functi…
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n/a | andytoshi | August 07, 2016, 10:52:39 AM |
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For the super paranoid: How do I get the public key from a private key by hand? Development & Technical Discussion
It's faster in wNAF and using Jacobian coordinates rather than Cartesian. Still…
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n/a | andytoshi | July 18, 2016, 09:55:04 AM |
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For the super paranoid: How do I get the public key from a private key by hand? Development & Technical Discussion
How much precomputation are you willing to do? Is it OK to use a computer for th…
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n/a | andytoshi | July 15, 2016, 08:19:43 AM |
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Smart contracts in bitcoin Development & Technical Discussion
To answer the OP's question, s/he could use something like a assurance contract,…
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n/a | andytoshi | July 14, 2016, 10:38:14 AM |
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attaching messages on transactions and retrieving them from the blockchain Development & Technical Discussion
You can only have a *single* OP_RETURN per tx - so there is no issue with multip…
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n/a | andytoshi | July 14, 2016, 10:28:43 AM |
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attaching messages on transactions and retrieving them from the blockchain Development & Technical Discussion
Please do not put arbitrary data in OP_RETURN outputs. This is antisocial becaus…
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n/a | andytoshi | July 14, 2016, 06:48:44 AM |
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Secret sharing Development & Technical Discussion
To add to Danny's "here's how to do it properly", the problem that OP mentioned…
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n/a | andytoshi | July 13, 2016, 06:23:42 AM |
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reasoning behind frequent new address generation Bitcoin Discussion
HI ggbitcoin,There are a couple "security" reasons this is worth doing:When you…
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n/a | andytoshi | July 13, 2016, 06:20:31 AM |
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x , y coordination division Development & Technical Discussion
Hi sss555,Sorry I missed your message about this the other day about this.From r…
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n/a | andytoshi | August 06, 2015, 10:55:06 AM |
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how to get X value from Y Development & Technical Discussion
Hi sss555,If you can, installing sage and using that rather than Python will mak…
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n/a | andytoshi | July 25, 2015, 10:33:40 PM |
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[Crypto] Compact Confidential Transactions for Bitcoin Development & Technical Discussion
I'm reasonably confident that the paper as written on July 3 works. I'm a bit un…
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n/a | andytoshi | July 07, 2015, 01:40:44 PM |
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[Crypto] Sumcoin Whitepaper - Compact Confidential Transactions Development & Technical Discussion
How does it compare to Gregory Maxwell "Confidential Transactions" ?If it is cor…
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n/a | andytoshi | June 11, 2015, 04:29:11 PM |
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[Crypto] Borromean ringsig: Efficiently proving knowledge for monotone functions Development & Technical Discussion
PS: using a edge-to-vertex dual graph where signatures are represented as nodes…
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n/a | andytoshi | June 04, 2015, 01:10:07 PM |
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Encoding a transaction in a point of the curve y^2=x^3+7 and Bitcoin Core Development & Technical Discussion
Hi arulbero,I like this question. The short answer is that messages are not enco…
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n/a | andytoshi | May 07, 2015, 01:16:55 PM |
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Coinjoin improvement..? Development & Technical Discussion
Cryddit, if the beers were all labeled with unique addresses this game would not…
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n/a | andytoshi | April 02, 2015, 05:15:06 PM |
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Why block time matters. Altcoin Discussion
Hi hamiltino,There are a couple reasons that the average block interval can't be…
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n/a | andytoshi | April 01, 2015, 03:37:38 PM |
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Cross Chain Pegging? Development & Technical Discussion
Are you aware of the sidechains whitepaper? The problems you will encounter are…
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n/a | andytoshi | April 01, 2015, 01:08:39 PM |
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XMR vs DRK Altcoin Discussion
it's more like math hasn't got to the stage where it can describe complex system…
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n/a | andytoshi | March 30, 2015, 02:16:20 PM |
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XMR vs DRK Altcoin Discussion
Can you (or Tok) point to a part of a cryptocurrency which isn't cryptography?th…
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n/a | andytoshi | March 29, 2015, 08:37:32 PM |
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XMR vs DRK Altcoin Discussion
Tok said cryptography 'wasn't a significant part' of cryptocurrencies. He didn'…
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n/a | andytoshi | March 29, 2015, 01:35:48 PM |
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Coinjoin improvement..? Development & Technical Discussion
In the big splashy CoinJoin post I simplified it down a model where there was so…
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n/a | andytoshi | March 29, 2015, 12:12:37 PM |
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DeckWallet: looking for security feedback and comments Development & Technical Discussion
Not only losing them, but shuffling them (or causing them to be shuffled, e.g. b…
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n/a | andytoshi | March 25, 2015, 10:50:27 PM |
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Transaction type Development & Technical Discussion
Note that the notion of sender addresses doesn't correspond to anything in the p…
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n/a | andytoshi | March 25, 2015, 10:45:34 PM |
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DeckWallet: looking for security feedback and comments Development & Technical Discussion
Any comments regarding security? Do you see any problems savings big amounts of…
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n/a | andytoshi | March 25, 2015, 10:42:10 PM |
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Is it possable to create proof of stake sidechains? Development & Technical Discussion
As far as PoS being unable to form a consensus well that is a larger issue about…
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n/a | andytoshi | March 23, 2015, 08:52:44 AM |
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Is it possable to create proof of stake sidechains? Development & Technical Discussion
For a 2-way pegged sidechain to work, the parent chain must be able to understan…
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n/a | andytoshi | March 20, 2015, 04:03:43 PM |
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Quick elliptic curve security question Development & Technical Discussion
Hey Peter,k1 is indeed hidden. You can argue this by reduction ... suppose you h…
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n/a | andytoshi | March 08, 2015, 05:04:31 PM |
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Conceptual Coding Question about the Bitcoin Client Development & Technical Discussion
Hi dain-001,Have you read A Treatise on Altcoins? How familiar with cryptography…
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n/a | andytoshi | February 15, 2015, 09:53:45 PM |
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An odd looking tx. Development & Technical Discussion
Hi CuriousCarl,Bitcoin transactions are actually chained together in a more gene…
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n/a | andytoshi | February 03, 2015, 04:54:33 PM |
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How to Create a Bitcoin Address from a Coin Flip Development & Technical Discussion
Can someone please tell me where are the 5-9 of this happening in the OP ?These…
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n/a | andytoshi | February 03, 2015, 04:42:53 PM |
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How to Create a Bitcoin Address from a Coin Flip Development & Technical Discussion
Please please please do not do this. The cryptosystem which Bitcoin keys and add…
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n/a | andytoshi | February 03, 2015, 04:42:08 PM |
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Is bitcoin v0.10's new libsecp256k1 safe & without mathematical backdoors? Development & Technical Discussion
It's just a matter of testing and really making sure it's got no mathematical bu…
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n/a | andytoshi | January 31, 2015, 10:50:26 PM |
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❢❢❢ The value proposition of each coin: BTC, DOGE, LTC, DRK, PPC, XRP, NXT, etc. Altcoin Discussion
I think it's on Andrew Poelstra to prove his claims.Hi ilodin,While this would b…
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n/a | andytoshi | January 29, 2015, 08:47:39 AM |
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Is bitcoin v0.10's new libsecp256k1 safe & without mathematical backdoors? Development & Technical Discussion
I've been looking at the code, and theres quite a few magic numbers in there Can…
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n/a | andytoshi | January 28, 2015, 09:22:04 AM |
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Is bitcoin v0.10's new libsecp256k1 safe & without mathematical backdoors? Development & Technical Discussion
Hi colinistheman,This is a good question. I should start off by mentioning that…
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n/a | andytoshi | January 27, 2015, 09:07:22 AM |
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Proof of Stake with Entropy loss as signature cost Altcoin Discussion
Each address that participates in signing will have a deterministic secret S (it…
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n/a | andytoshi | November 06, 2014, 09:36:47 AM |
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Pegged Sidechains [PDF Whitepaper] Development & Technical Discussion
laurentmt: definitely. This is sorta "allowed by default" by a sidechain design…
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n/a | andytoshi | November 04, 2014, 08:32:37 AM |
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A(nother) downside to Proof-of-Stake? Development & Technical Discussion
Quoteandytoshi, what do you think about saving PoS by bouncing checkpoints/block…
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n/a | andytoshi | November 01, 2014, 02:05:10 PM |
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What are checkpoints in bitcoin code? Development & Technical Discussion
Exactly the point. Node's already trust that blocks are valid because they have…
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n/a | andytoshi | November 01, 2014, 01:59:18 PM |
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What are checkpoints in bitcoin code? Development & Technical Discussion
QuoteOld checkpoints distort the selection of the chain, but there's no reason n…
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n/a | andytoshi | November 01, 2014, 11:11:47 AM |
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A(nother) downside to Proof-of-Stake? Development & Technical Discussion
I still don't see how a nothing at stake attack could succeed.Maybe if you read…
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n/a | andytoshi | November 01, 2014, 11:05:56 AM |
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Message Encryption with bitcoin address. Development & Technical Discussion
In this situation the sender would have by default had to already reveal (to the…
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n/a | andytoshi | October 31, 2014, 01:46:06 PM |
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A(nother) downside to Proof-of-Stake? Development & Technical Discussion
Oh, my bad, I thought you had linked to an earlier one.The one you posted was hi…
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n/a | andytoshi | October 30, 2014, 09:29:43 PM |
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A(nother) downside to Proof-of-Stake? Development & Technical Discussion
I am curious to hear other's opinions on Vitalik's PoS proposals that attempt to…
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n/a | andytoshi | October 30, 2014, 08:52:50 PM |
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AttackerSuccessProbability(0.3,1) = 0.627749 Development & Technical Discussion
Either this interpretation is incorrect or something in the Satoshi formulae is…
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n/a | andytoshi | October 30, 2014, 08:40:10 PM |
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multisig using Curve25519 Development & Technical Discussion
Oops! || is concatenation -- you hash the message, then hash R with the same sha…
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n/a | andytoshi | October 13, 2014, 08:01:49 PM |
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multisig using Curve25519 Development & Technical Discussion
Hi James,m is the message to be signed . The signature is the pair (r, s).Andrew
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n/a | andytoshi | October 13, 2014, 07:32:26 PM |
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multisig using Curve25519 Development & Technical Discussion
Hi James,It seems like are a few misunderstandings here. Let me start with some…
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n/a | andytoshi | October 13, 2014, 02:24:07 PM |
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A -failed- solution to a collusion flaw in Deterministic Wallets Development & Technical Discussion
You can mitigate this somewhat by use of hardened keys (which cannot be derived…
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n/a | andytoshi | October 11, 2014, 11:23:55 AM |
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checkpoints.cpp and timestamps Development & Technical Discussion
Checkpoints are really not necessary. They prevent a DoS attack where on first b…
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n/a | andytoshi | October 11, 2014, 11:16:12 AM |
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[Q] How/where TXID is created Bitcoin Technical Support
He could generate a raw transaction and sign it multiple times (as this yields a…
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n/a | andytoshi | October 10, 2014, 07:54:44 AM |
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Looking into forking the core wallet to use parallel computing to verify blocks Development & Technical Discussion
Interested in this also. Maybe begin looking at how parallelisable sipa's libsec…
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n/a | andytoshi | October 08, 2014, 09:10:16 PM |
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A vulnerability in olalonde's implementation of gmaxwell's proof-of-solvency Development & Technical Discussion
You don't need to verify the integrity of nodeC.left.hash or nodeC.right.hash.
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n/a | andytoshi | October 08, 2014, 02:12:05 PM |
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A vulnerability in olalonde's implementation of gmaxwell's proof-of-solvency Development & Technical Discussion |
n/a | andytoshi | October 08, 2014, 12:33:06 PM |
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A Scalability Roadmap Development & Technical Discussion
Ordinary people aren't supposed to run full nodes anyway This is absurd and fal…
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n/a | andytoshi | October 08, 2014, 12:08:34 PM |
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A vulnerability in olalonde's implementation of gmaxwell's proof-of-solvency Development & Technical Discussion
The prover provides nodeC's child hashes. There is no need to verify that they a…
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n/a | andytoshi | October 08, 2014, 12:07:54 PM |
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Looking into forking the core wallet to use parallel computing to verify blocks Development & Technical Discussion
It's not so much that they are far away from each other (though they are), it's…
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n/a | andytoshi | October 08, 2014, 12:07:03 PM |
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Looking into forking the core wallet to use parallel computing to verify blocks Development & Technical Discussion
Hi Skeeter,I've played around with parallelizing verification (though not as par…
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n/a | andytoshi | October 08, 2014, 10:49:15 AM |
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A vulnerability in olalonde's implementation of gmaxwell's proof-of-solvency Development & Technical Discussion
The value of each node is part of the input to the hash for that node. The verif…
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n/a | andytoshi | October 08, 2014, 10:35:09 AM |
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A vulnerability in olalonde's implementation of gmaxwell's proof-of-solvency Development & Technical Discussion
The prover cannot, because nodeC.hash = H(4 || nodeC.left_child_hash || nodeC.ri…
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n/a | andytoshi | October 08, 2014, 10:26:44 AM |
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A vulnerability in olalonde's implementation of gmaxwell's proof-of-solvency Development & Technical Discussion
The prover could falsify nodeC.val without changing nodeC.hashThe prover cannot,…
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n/a | andytoshi | October 08, 2014, 09:25:01 AM |
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A vulnerability in olalonde's implementation of gmaxwell's proof-of-solvency Development & Technical Discussion
It's still logarithmic. You only reveal the preimages of the neighboring hashes…
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n/a | andytoshi | October 08, 2014, 09:00:37 AM |
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A vulnerability in olalonde's implementation of gmaxwell's proof-of-solvency Development & Technical Discussion
You are making sense. What I'm saying is that in the iwilcox writeup, all the in…
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n/a | andytoshi | October 08, 2014, 07:48:10 AM |
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A vulnerability in olalonde's implementation of gmaxwell's proof-of-solvency Development & Technical Discussion
My reading of iwilcox's post (well, my reading of the big diagram with nodes cir…
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n/a | andytoshi | October 07, 2014, 05:28:21 PM |
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A vulnerability in olalonde's implementation of gmaxwell's proof-of-solvency Development & Technical Discussion
Hi charlescharles,Good catch. This actually addressed in iwilcox's writeup --- g…
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n/a | andytoshi | October 07, 2014, 04:31:00 PM |
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Preventing Asic mining [fork] after next halving would solve a lot of problems. Development & Technical Discussion
The only way to avoid this expense, is to fade out PoW mining altogether, and ch…
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n/a | andytoshi | October 06, 2014, 10:58:28 PM |
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Preventing Asic mining [fork] after next halving would solve a lot of problems. Development & Technical Discussion
Seems like they have at least the same understanding about the words I was using…
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n/a | andytoshi | October 05, 2014, 02:19:15 PM |
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Preventing Asic mining [fork] after next halving would solve a lot of problems. Development & Technical Discussion
Sigh, ASIC hardness has been discussed ad nauseum. It is neither possible nor de…
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n/a | andytoshi | October 05, 2014, 12:52:11 PM |
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Can side-chains be used to achieve optimal network security / transaction fees? Development & Technical Discussion
When you unlock coins on the mainchain, all that it sees is a SPV proof of owner…
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n/a | andytoshi | September 26, 2014, 10:34:02 PM |
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BTC fees and micropayments Development & Technical Discussion
@andytoshi: I truely respect your work and don't want to be a troll with you; bu…
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n/a | andytoshi | September 23, 2014, 07:15:09 AM |
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Alternative ways of spam prevention Development & Technical Discussion
How would it be if the spam transactions are prevented not by transaction fees b…
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n/a | andytoshi | September 22, 2014, 04:43:10 PM |
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BTC fees and micropayments Development & Technical Discussion
The Bitcoin protocol is perfectly capable of handling micropayments. Most nodes…
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n/a | andytoshi | September 22, 2014, 12:37:54 PM |
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Hard-Fork to make us have a have a FREE Universal lottery system Development & Technical Discussion
Well, I mean to originate a transaction signed by the private key to which that…
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n/a | andytoshi | September 21, 2014, 10:53:34 AM |
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Hard-Fork to make us have a have a FREE Universal lottery system Development & Technical Discussion
There would be a change in the protocol so that a specific addressAddresses do n…
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n/a | andytoshi | September 21, 2014, 09:21:42 AM |
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Is it possible to create a message readable only to the owner of an address? Development & Technical Discussion
Yes I believe I understand that. I thought that by comparing the hash time-stam…
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n/a | andytoshi | September 16, 2014, 03:12:49 PM |
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Is it possible to create a message readable only to the owner of an address? Development & Technical Discussion
Right. But what if Alice includes a hash of the message in the OP_RETURN-you-ha…
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n/a | andytoshi | September 16, 2014, 02:12:48 PM |
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Is it possible to create a message readable only to the owner of an address? Development & Technical Discussion
It's still not completely clear to me why, if the goal is to send the message to…
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n/a | andytoshi | September 16, 2014, 11:59:35 AM |
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Is it possible to create a message readable only to the owner of an address? Development & Technical Discussion
Greg told me that this method is insecure, but I still don't understand why. In…
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n/a | andytoshi | September 16, 2014, 08:54:49 AM |
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Implementing Secret Sharing with an Encrypted Bitcoin Wallet Development & Technical Discussion
What are you trying to do?Split up the encrypted wallet's private key with ssss…
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n/a | andytoshi | September 15, 2014, 07:13:15 PM |
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Implementing Secret Sharing with an Encrypted Bitcoin Wallet Development & Technical Discussion
Then use multisignature transactions. SSSS is inappropriate because the secret d…
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n/a | andytoshi | September 15, 2014, 02:18:44 PM |
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ASIC-resistant Proof of Work Mining (Altcoins)
https://download.wpsoftware.net/bitcoin/asic-faq.pdfQuestions 2.5 and 2.6 cover…
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n/a | andytoshi | September 15, 2014, 07:35:05 AM |
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Implementing Secret Sharing with an Encrypted Bitcoin Wallet Development & Technical Discussion
What are you trying to do?
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n/a | andytoshi | September 13, 2014, 03:50:38 PM |
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What will be considered Bitcoin 1.0? Development & Technical Discussion
1. thoroughly solve 51% problem2. eliminate the risk of accepting zero confirmat…
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n/a | andytoshi | September 12, 2014, 08:31:53 PM |
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Minimal Python address generator Development & Technical Discussion
The majority of the python code is "classic Joric" address-from-user-passphrase…
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n/a | andytoshi | September 12, 2014, 06:03:31 PM |
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Do SIGHASH_ALL and SIGHASH_NONE sign all inputs? Development & Technical Discussion
QuoteThank you for your answer! I'm still a little confused about the sequence n…
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n/a | andytoshi | September 12, 2014, 05:59:27 PM |
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Do SIGHASH_ALL and SIGHASH_NONE sign all inputs? Development & Technical Discussion
Yes, except for the SIGHASH_ANYONECANPAY flag (which causes only one input to be…
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n/a | andytoshi | September 12, 2014, 01:27:50 PM |
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