Words on Bitcoin Design, Privacy, Security and Crypto, by Sergio Demian Lerner
Contributions to Bitcoin and the cryptocurrency field
HC Family of Block Cipher modes
My name is Sergio Demian Lerner. I’m a Cryptofan, Independent Security Researcher, and Bitcoin specialist since 2011.
I work at Certimix, developing Firmcoin, QixCoin, and other crazy ideas.
Follow me on Twitter: @SDLerner
I discovered and responsible reported these Bitcoin-Related vulnerabilities:
Lack of orphan tx limit prior v0.5.3
CVE-2012-3789: Multiple DoS Vulnerabilties in Satoshi client
CVE-2012-4683: Targeted DoS by CPU exhaustion using alerts
CVE-2012-4684: Network-wide DoS using malleable signatures in alerts
CVE-2013-2272: Remote discovery of node’s wallet addresses
CVE-2013-2292: A transaction that takes at least 3 minutes to verify
CVE-2013-2293: Continuous hard disk seek
CVE-2013-4627 security holes.
security vulnerability in BouncyCastle ECDSA (BJB-22)
Brumley/Tuveri attack to SatoshiDice
BitsOfProof client vulnerabilities
Bitmessage v1.0: completely broken crypto
Me and Bitcoin
When I first read Bitcoin paper I rushed to analyze its source code. I got fascinated for its simplicity. But also I found many things for improvement, both in the economic, cryptographic and protocol related areas.
This blog aim is to provide clues for Bitcoin improvement but also to build the infrastructure for new crypto-currencies. I dream of a future with an ecosystem of crypto-currencies, even some of the government-backed. I plan to take active part in this future.
I hope you enjoy redesigning Bitcoin as I do.
If you like my work and want to encourage me in researching further you can donate to this address: 17mcFB7Xyymd9hxp2bgNPz1ruWsdoPoCnZ
2013-04-13: I’m very happy to announce that today I received 1 BTC from an anonymous donor! Thank you!