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Bitcoin PayPhrase - human-friendly payment system Development & Technical Discussion
1) X owes Y some bitcoins and communicates Y a pass phrase containing the coins.…
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n/a | drazvan | November 09, 2013, 03:40:00 PM |
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Bitcoin PayPhrase - human-friendly payment system Development & Technical Discussion
A couple of things spring to mind.How can you generate a reasonable short phrase…
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n/a | drazvan | November 09, 2013, 02:36:08 PM |
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Bitcoin PayPhrase - human-friendly payment system Development & Technical Discussion
Hello everyone,While working on my OtherCoin off-chain payment system (https://b…
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n/a | drazvan | November 09, 2013, 02:13:19 PM |
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Off-chain anonymous transactions by secure transfer of private keys Development & Technical Discussion
Also, paying by sending a private key allows for some very interesting form fact…
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n/a | drazvan | November 05, 2013, 11:03:10 AM |
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Off-chain anonymous transactions by secure transfer of private keys Development & Technical Discussion
So it's basically safe if you absolutely know that the merchant implements the p…
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n/a | drazvan | November 05, 2013, 10:27:24 AM |
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Off-chain anonymous transactions by secure transfer of private keys Development & Technical Discussion
The problem with the payment protocol and malware is the one I described on the…
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n/a | drazvan | November 05, 2013, 06:24:54 AM |
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Off-chain anonymous transactions by secure transfer of private keys Development & Technical Discussion
There's also another very interesting application for this technology/idea: Bitc…
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n/a | drazvan | November 04, 2013, 05:30:24 PM |
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Off-chain anonymous transactions by secure transfer of private keys Development & Technical Discussion
I don't think it's going to be an "all or nothing" situation - I'm definitely no…
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n/a | drazvan | November 02, 2013, 11:12:10 AM |
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Off-chain anonymous transactions by secure transfer of private keys Development & Technical Discussion
Thank you beeblebrox! My answer was directed at justusranvier, I was just explai…
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n/a | drazvan | November 02, 2013, 10:24:41 AM |
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Off-chain anonymous transactions by secure transfer of private keys Development & Technical Discussion
In the case of the OtherCoins, we're definitely not "holding bitcoins on the use…
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n/a | drazvan | November 02, 2013, 07:23:47 AM |
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Off-chain anonymous transactions by secure transfer of private keys Development & Technical Discussion
You are right Piotr, it can be made into a standalone wallet (and I expect other…
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n/a | drazvan | November 01, 2013, 09:40:37 AM |
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Off-chain anonymous transactions by secure transfer of private keys Development & Technical Discussion
I just realized, an easy way to think about all this is if you're familiar with…
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n/a | drazvan | October 31, 2013, 11:22:29 AM |
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Off-chain anonymous transactions by secure transfer of private keys Development & Technical Discussion
The problem with smart cards is that they don't have a calendar.No problem there…
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n/a | drazvan | October 31, 2013, 11:19:13 AM |
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Off-chain anonymous transactions by secure transfer of private keys Development & Technical Discussion
SPV is definitely a path worth exploring.But @drazvan, do you even have ECDSA an…
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n/a | drazvan | October 31, 2013, 11:16:16 AM |
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Off-chain anonymous transactions by secure transfer of private keys Development & Technical Discussion
Sorry - could you please elaborate a bit more on this.I though what we were talk…
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n/a | drazvan | October 31, 2013, 11:14:33 AM |
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Off-chain anonymous transactions by secure transfer of private keys Development & Technical Discussion
Piotr, adding funds to the card is simple - the wallet already knows the address…
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n/a | drazvan | October 31, 2013, 10:46:33 AM |
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Off-chain anonymous transactions by secure transfer of private keys Development & Technical Discussion
Hi Adam,The mechanism you described (which is pretty cool btw!) would protect ag…
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n/a | drazvan | October 31, 2013, 10:28:32 AM |
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Off-chain anonymous transactions by secure transfer of private keys Development & Technical Discussion
A lot of things can be done by using an external oracle (in this case the issuin…
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n/a | drazvan | October 31, 2013, 06:45:37 AM |
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[PREORDER] Trezor: Bitcoin hardware wallet Hardware wallets
TREZOR is payment protocol ready (BIP70) which adresses exactly this issue.I und…
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n/a | drazvan | October 31, 2013, 05:12:44 AM |
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Off-chain anonymous transactions by secure transfer of private keys Development & Technical Discussion
Is the tamper-resistance mostly hardware related, i.e. which of these 2 things-…
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n/a | drazvan | October 30, 2013, 04:35:28 PM |
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Off-chain anonymous transactions by secure transfer of private keys Development & Technical Discussion
So you already have an implementation? Good for you, man!If you need developers…
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n/a | drazvan | October 30, 2013, 02:14:07 PM |
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Off-chain anonymous transactions by secure transfer of private keys Development & Technical Discussion
Yeah. If you assume a trust in the authority that made the card, then you can as…
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n/a | drazvan | October 30, 2013, 01:47:48 PM |
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Off-chain anonymous transactions by secure transfer of private keys Development & Technical Discussion
But how do you see the accounting part?If the only thing the card can transfer i…
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n/a | drazvan | October 30, 2013, 01:13:22 PM |
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Off-chain anonymous transactions by secure transfer of private keys Development & Technical Discussion
No trusted third party server – information is secured by each smartcard, there…
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n/a | drazvan | October 30, 2013, 01:07:42 PM |
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Off-chain anonymous transactions by secure transfer of private keys Development & Technical Discussion
Exactly. The recipient of the funds presents his signed RSA-2048 key signed by t…
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n/a | drazvan | October 30, 2013, 01:05:27 PM |
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[PREORDER] Trezor: Bitcoin hardware wallet Hardware wallets
Unless everyone suddenly implements the protocol (any of the protocols described…
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n/a | drazvan | October 30, 2013, 12:11:21 PM |
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Off-chain anonymous transactions by secure transfer of private keys Development & Technical Discussion
Piotr, the way it works is that there are two separate operations. The first one…
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n/a | drazvan | October 30, 2013, 07:59:48 AM |
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[PREORDER] Trezor: Bitcoin hardware wallet Hardware wallets
What I've described is not a matter of CAs, it's a matter of backwards compatibi…
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n/a | drazvan | October 30, 2013, 07:51:44 AM |
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Off-chain anonymous transactions by secure transfer of private keys Development & Technical Discussion
Thats kinda bad for privacy. You could use a cryptographically secure bloom fil…
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n/a | drazvan | October 30, 2013, 06:59:24 AM |
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Off-chain anonymous transactions by secure transfer of private keys Development & Technical Discussion
Piotr_n, there is no private key that all the cards share. They all share the pu…
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n/a | drazvan | October 30, 2013, 06:31:26 AM |
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Off-chain anonymous transactions by secure transfer of private keys Development & Technical Discussion
There is an alert mechanism already built into the system - basically, the walle…
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n/a | drazvan | October 29, 2013, 06:39:46 PM |
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[PREORDER] Trezor: Bitcoin hardware wallet Hardware wallets
What would happen to merchants that do not speak/use the payment protocol? If th…
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n/a | drazvan | October 29, 2013, 06:01:19 PM |
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Off-chain anonymous transactions by secure transfer of private keys Development & Technical Discussion
Also, the plan is to eventually get more than 1 entity certifying/signing the de…
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n/a | drazvan | October 29, 2013, 05:43:05 PM |
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Off-chain anonymous transactions by secure transfer of private keys Development & Technical Discussion
My apologies, tamper-resistant is more accurate. The cards we plan to use are ce…
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n/a | drazvan | October 29, 2013, 05:38:05 PM |
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Off-chain anonymous transactions by secure transfer of private keys Development & Technical Discussion
Hello everyone,I've posted a message on the Project Development thread at https:…
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n/a | drazvan | October 29, 2013, 05:16:45 PM |
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[PREORDER] Trezor: Bitcoin hardware wallet Hardware wallets
This might have been answered before (if it has, I couldn't find it): can the Tr…
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n/a | drazvan | October 29, 2013, 04:58:44 PM |
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Project OtherCoin - off-chain payment system using tamperproof chips Project Development
Hi everyone,I would like to introduce a project that I've been working on for th…
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n/a | drazvan | October 26, 2013, 05:40:23 PM |
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iBTCARD: Worlds first bicoin debit card - More Details & Poll Project Development
The only issue is that the merchant will almost certainly want to convert the Bi…
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n/a | drazvan | July 26, 2013, 08:33:37 AM |
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[ANN] VisualBTC - Android-based hardware offline wallet using animated QR codes Project Development
Well, you won't be using it to film your next Oscar-winning motion picture, 0.3M…
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n/a | drazvan | July 17, 2013, 07:29:55 PM |
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[ANN] VisualBTC - Android-based hardware offline wallet using animated QR codes Project Development
http://www.storageoptions.com/products/scroll/tablets/scroll-pocket - go to the…
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n/a | drazvan | July 17, 2013, 06:17:51 PM |
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[ANN] VisualBTC - Android-based hardware offline wallet using animated QR codes Project Development
i have a 3g and a 3gs iphones that i am not doing anything with, would this work…
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n/a | drazvan | July 17, 2013, 05:56:22 PM |
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[ANN] VisualBTC - Android-based hardware offline wallet using animated QR codes Project Development
Why would he recommend a tablet with no camera?What about backup?Settings menu d…
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n/a | drazvan | July 17, 2013, 05:54:19 PM |
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[ANN] VisualBTC - Android-based hardware offline wallet using animated QR codes Project Development
Fairly big issue with the device posted up there... has no camera.In fact there…
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n/a | drazvan | July 17, 2013, 05:48:37 PM |
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[PREORDER] Trezor: Bitcoin hardware wallet Hardware wallets
hmm...a great device. Even better would be the standalone;same thing with a disp…
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n/a | drazvan | July 17, 2013, 07:52:13 AM |
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ECDSA subliminal channels Development & Technical Discussion
The users will inherently trust the wallet (at least most of them will - after a…
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n/a | drazvan | June 19, 2013, 11:15:36 AM |
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ECDSA subliminal channels Development & Technical Discussion
Hi everyone,I'm working on a hardware wallet for Bitcoin and I am trying to unde…
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n/a | drazvan | June 18, 2013, 08:15:37 PM |
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[PREORDER] Trezor: Bitcoin hardware wallet Hardware wallets
um doesnt pretty much every retailer in the first word have a little terminal fo…
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n/a | drazvan | June 17, 2013, 04:12:10 PM |
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[PREORDER] Trezor: Bitcoin hardware wallet Hardware wallets
*edit* maybe the next step for you guys is a hardware devise for merchants which…
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n/a | drazvan | June 17, 2013, 10:45:08 AM |
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[PREORDER] Trezor: Bitcoin hardware wallet Hardware wallets
you could use it at a merchant with no worriesNo worries for who? You or the mer…
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n/a | drazvan | June 16, 2013, 03:20:08 PM |
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[PREORDER] Trezor: Bitcoin hardware wallet Hardware wallets
Either the device is secure or it isn't. If it isn't, then it's pointless. If it…
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n/a | drazvan | June 16, 2013, 03:15:38 PM |
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[PREORDER] Trezor: Bitcoin hardware wallet Hardware wallets
What he's saying is that the device could be attacked - obviously not by design,…
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n/a | drazvan | June 16, 2013, 03:09:04 PM |
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Best Bitcoin Android apps and widgets Bitcoin Discussion
Can you add our offline wallet: https://play.google.com/store/apps/details?id=co…
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n/a | drazvan | May 27, 2013, 07:28:15 PM |
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Use old out-of-service smartphones for BTC offline storage+signing transactions Project Development
You want proof of a deposit, just look at the address in the block-chain. They g…
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n/a | drazvan | May 26, 2013, 03:13:46 PM |
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Use old out-of-service smartphones for BTC offline storage+signing transactions Project Development
Ok, no problem, I'll move the discussion to the VisualBTC thread. Just one thing…
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n/a | drazvan | May 26, 2013, 10:29:08 AM |
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Use old out-of-service smartphones for BTC offline storage+signing transactions Project Development
One more thing (I should probably post it to the VisualBTC thread but it answers…
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n/a | drazvan | May 25, 2013, 02:40:52 PM |
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Use old out-of-service smartphones for BTC offline storage+signing transactions Project Development
Thanks for the clarification. So this seems fine as long as the user is really n…
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n/a | drazvan | May 25, 2013, 02:15:27 PM |
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Bitcoin and Smart Cards Bitcoin Discussion
I'm not sure what you mean by "verified through an API"... at the time of the pa…
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n/a | drazvan | May 25, 2013, 05:38:11 AM |
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Use old out-of-service smartphones for BTC offline storage+signing transactions Project Development
The server involved is blockchain.info - we fetch transaction information from i…
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n/a | drazvan | May 25, 2013, 05:08:01 AM |
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Use old out-of-service smartphones for BTC offline storage+signing transactions Project Development
Also, the reasons I dislike the idea of reusing old hardware (old smartphones) a…
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n/a | drazvan | May 24, 2013, 08:53:32 PM |
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Use old out-of-service smartphones for BTC offline storage+signing transactions Project Development
Just three things for tonight:1. VisualBTC does not require a server, the online…
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n/a | drazvan | May 24, 2013, 08:48:14 PM |
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Bitcoin and Smart Cards Bitcoin Discussion
You mean something like this: https://bitcointalk.org/index.php?topic=190046.0 ?…
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n/a | drazvan | May 24, 2013, 07:46:38 PM |
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Use old out-of-service smartphones for BTC offline storage+signing transactions Project Development
Michael, have you looked at VisualBTC (I mentioned the link above: https://bitco…
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n/a | drazvan | May 24, 2013, 07:23:56 PM |
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Tech details needed to give cryptocoins the benefits mandatory for true adoption Development & Technical Discussion
You don't have to go through NFC, far more phones have screens and cameras: http…
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n/a | drazvan | May 23, 2013, 05:26:19 AM |
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Tech details needed to give cryptocoins the benefits mandatory for true adoption Development & Technical Discussion
Tuheeden, you do realize that paper wallets cannot be passed around like cash, d…
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n/a | drazvan | May 22, 2013, 07:28:00 PM |
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Piper: A paper wallet generator and printer - Project Update Project Development
Well, I suspect the internal Linux system is either a Raspberry Pi Model A ($25)…
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n/a | drazvan | May 22, 2013, 08:14:46 AM |
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Piper: A paper wallet generator and printer - Project Update Project Development
Probably one of these: http://www.adafruit.com/products/597
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n/a | drazvan | May 22, 2013, 07:47:56 AM |
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[ANN] VisualBTC - Android-based hardware offline wallet using animated QR codes Project Development
BTW, I know I mentioned it in the first post but people keep asking me this, so…
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n/a | drazvan | May 21, 2013, 05:37:27 PM |
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[ANN] VisualBTC - Android-based hardware offline wallet using animated QR codes Project Development
Hello everyone,I've just released VisualBTC, an Android-based offline Bitcoin wa…
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n/a | drazvan | May 19, 2013, 02:24:07 PM |
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[WANTED] Wallet developer(s) Project Development
On the contrary, let's have as many competing wallets as possible and may the be…
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n/a | drazvan | May 20, 2013, 08:07:20 AM |
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[QUESTION] Offline hardware wallet transactions Project Development
It doesn't have to be on the Internet, it just needs a way to send its transacti…
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n/a | drazvan | May 20, 2013, 07:52:27 AM |
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[ANN] VisualBTC - Android-based offline wallet using animated QR codes Project Development
At this point the app is not open source. We're trying to figure out the best wa…
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n/a | drazvan | May 20, 2013, 06:28:39 AM |
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[WANTED] Wallet developer(s) Project Development
Have a look at VisualBTC: https://bitcointalk.org/index.php?topic=210371.0 . I'v…
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n/a | drazvan | May 19, 2013, 06:55:49 PM |
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Improving Offline Wallets (i.e. cold-storage) Development & Technical Discussion
Etotheipi mentioned QR codes in his initial post and we've tried to work around…
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n/a | drazvan | May 19, 2013, 05:24:49 PM |
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[QUESTION] Offline hardware wallet transactions Project Development
Icellan is right, a transaction exists only after it is broadcast on the Bitcoin…
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n/a | drazvan | May 19, 2013, 05:01:56 PM |
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[ANN] VisualBTC - Android-based offline wallet using animated QR codes Project Development
Thank you!One more thing that I think makes this solution very interesting: this…
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n/a | drazvan | May 19, 2013, 03:40:36 PM |
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Use old out-of-service smartphones for BTC offline storage+signing transactions Project Development
Have you seen my recent thread at https://bitcointalk.org/index.php?topic=210371…
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n/a | drazvan | May 19, 2013, 03:28:58 PM |
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Blockchain.info - Bitcoin Block explorer & Currency Statistics Web Wallets
Thank you Piuk, could you do the same for /unspent? Chrome still says something…
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n/a | drazvan | May 15, 2013, 08:15:11 AM |
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Blockchain.info - Bitcoin Block explorer & Currency Statistics Web Wallets
I wonder if you could modify the API (most specifically the "pushtx" function) a…
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n/a | drazvan | May 13, 2013, 06:11:27 PM |
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SIGHASH_WITHINPUTVALUES: Super-lightweight HW wallets and offline data Development & Technical Discussion
It seems a bit excessive to bring in an extra piece of hardware to try solve thi…
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n/a | drazvan | April 29, 2013, 04:25:06 PM |
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SIGHASH_WITHINPUTVALUES: Super-lightweight HW wallets and offline data Development & Technical Discussion
FYI, the way I deal with this issue today (specification update pending), to mak…
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n/a | drazvan | April 29, 2013, 03:41:56 PM |
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Prevent double-spend by using smartcard hardware wallets Development & Technical Discussion
I've just read it, sorry. It's a very nice idea and you're right, it doesn't loc…
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n/a | drazvan | April 29, 2013, 11:37:23 AM |
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Prevent double-spend by using smartcard hardware wallets Development & Technical Discussion
As you said, the problem with involving a third party with each payment is that…
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n/a | drazvan | April 29, 2013, 11:14:08 AM |
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Prevent double-spend by using smartcard hardware wallets Development & Technical Discussion
@grue, I know very well what double spending means. What I'm proposing is a way…
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n/a | drazvan | April 28, 2013, 07:01:06 PM |
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Prevent double-spend by using smartcard hardware wallets Development & Technical Discussion
Hello,I was wondering if anyone with more knowledge of the Bitcoin inner working…
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n/a | drazvan | April 28, 2013, 05:31:59 PM |
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[ANN] btchip : a Smartcard wallet (no reader required / now with anti-malware) Hardware wallets
Hey guys, I've sent you an email (contact (at) btchip (dot) com ). I think I mig…
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n/a | drazvan | April 15, 2013, 11:40:02 AM |
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Bitcoin debit card Bitcoin Discussion
You could do more than simply notify the user of the transaction amount, you cou…
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n/a | drazvan | April 15, 2013, 11:34:24 AM |
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Newbie restrictions Beginners & Help
Same here... I fail to see how this protects the forums and improves the quality…
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n/a | drazvan | April 15, 2013, 11:24:38 AM |
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README replies Beginners & Help
Is the whitelist thread still active at all? I mean does anyone read those reque…
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n/a | drazvan | April 15, 2013, 11:19:33 AM |
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Bitcoin Businesses and Developers, Let's Get Started! Beginners & Help
Does anyone still read these messages? Or should I just post until I hit the 5 p…
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n/a | drazvan | April 15, 2013, 11:17:59 AM |
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Bitcoin Businesses and Developers, Let's Get Started! Beginners & Help
Hi everyone,I am the owner/developer of VeriFi (https://www.veri.fi/) . Company…
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n/a | drazvan | April 14, 2013, 01:51:10 PM |
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Whitelist Requests (Want out of here?) Beginners & Help
Hi there,I am the owner/developer of http://www.veri.fi/ and http://www.automoni…
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n/a | drazvan | April 14, 2013, 01:47:47 PM |
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