SDLerner
Bitcoin design analyst
Homepage: https://bitslog.wordpress.com
How you will not uncover Satoshi
Posted in Uncategorized on June 19, 2014
Computer forensics is the science of finding evidence in computers and digital documents, and when a hacker perform forensics, better be prepared for the unknown. Satoshi did many things in order to try to stay anonymous: he used Tor, he used anonymous e-mail servers, he did not disclose personal information in posts and probably he […]
Theoretical and Practical Nonoutsourceable Puzzles
Posted in Uncategorized on June 19, 2014
The fact that GHash.io has reached twice 51% of the Bitcoin hashing power this year has pushed scientist and alt-coin creators to find for other proof-of-work puzzles that discourage mining coalitions. Several months ago I read the foundations of Nonoutsourceable Puzzles as proposed by Andrew Miller, and now his paper (working with Elaine Shi, Jonathan […]
Deterministic Signatures, Subliminal channels and Hardware wallets
Posted in Uncategorized on June 9, 2014
A subliminal channel in a signature scheme allows a signing party to send a covert message to an authorized receiver of signed messages without anyone else noticing it. One property of ECDSA, DSA and many similar digital signature schemes (such as Schnorr) is that they need to produce, for each signature generation, a fresh random […]
NimbleCoin can be Bitcoin’s Best Friend
Posted in Uncategorized on May 12, 2014
The debate of what will happen with Bitcoin hashing power when the reward is halved around August 2016 is starting to boil in the bitcointalk forums. Some questions have been risen about the security of CPU-friendly alt-coins, such as LiteCoin and DogeCoin in the long run. The problem was summarized in one sentence: If the […]
DECOR+
Posted in Uncategorized on May 7, 2014
In my previous post I presented the DECOR protocol. One of the assumptions I did was that the amount of coins each miner earned in competing blocks was approximately the same. This could be true for cryptocurrencies with never ending block subsidies (inflationary designs) because the block subsidy may be an order of magnitude higher […]
Even faster block-chains with DECOR protocol
Posted in Uncategorized on May 2, 2014
One of the most interesting papers ever written about the Bitcoin block-chain design is “Accelerating Bitcoin’s Transaction Processing” by Sompolinsky and Zohar. The paper presents the GHOST protocol which aims to achieve higher TPS securely by changing the way nodes decide which is the best chain fork. The authors try to reduce the block rate […]
The Roads to Innovation in Cryptocurrencies
Posted in Uncategorized on May 1, 2014
Once upon a time there was Bitcoin and nothing else. History was being written by Satoshi and a few illuminated minds that posted the most interesting ideas in the Bitcointalk forums and IRC channels. Almost every cryptocurrency idea I’ve heard of had a seed in some of these heated online discussions. During 2009 improving every […]
SmartSPV – A better Simplified Payment Verification for Smartphones
Posted in Uncategorized on April 25, 2014
NimbleCoin is a new cryptocurrency I’ll be hopefully launching soon. One of its nice features is that it uses the FastBlock5 protocol (a 5 seconds block interval) to achieve near instant payments. Because NimbleCoin also implements merged mining, each block header can be as large as 700 bytes (including Merkle branch and coinbase transaction). Yesterday […]
AppeCoin Anonymous Cryptocurrency Draft
Posted in Uncategorized on April 24, 2014
Two years ago I posted about a proposal of to create an anonymous cryptocurrency. This was much time before the ZeroCoin and ZeroCash protocols were proposed. I had moral concerns regarding the idea of an anonymous payment protocol: why such protocol would be needed and who would benefit from the protocol. Adam Back and Gregory […]
The Private Automatic Miner Backbone Protocol (PAMBA)
Posted in Uncategorized on April 19, 2014
The need for direct connection between the main miner pools or solo-miners (which is often called the miner backbone), was discussed several times in the forums and in this blog during the last two years. A miner backbone provides not only benefits to the network as a whole, but benefits for those miners that establish […]
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