This is a list of contributions to the cryptocurrency ecosystem. Many of them have been first published in this blog. Some others are hidden in forums.
QixCoin: The first Turing-complete cryptocurrency
MAVE: Digital Signature Protocol for Massive bulk verifications
MAVEPAY: a new lightweight payment scheme for peer to peer currency networks(Link)
New Opcode: PUSH_SIG
Paycket protocol: How to reward nodes that relay txs
PayQueue: Still another protocol to reward nodes that relay txs
Hidden-branch-protection Protocol
Soft-fork Proposal: allow nLockTime specify an upper limit instead of lower limit
The Tick Method: How to prevent wallet theft
BIP: Increasing the Network Hashing Power by reducing block propagation time
HL mining protocol (Heavy/Light mining): reducing block propagation problems
New opcode: OP_PUSH_BLOCK_DATE
Still More New Opcodes proposal
Destination Address Anonymization in Bitcoin, August 6, 2012
New SIGHASH_MULTI flag
New Opcode: OP_COPY_SCRIPTSIG
A clean solution to ALL Bitcoin problems: SatoshiDice, Block size, future fees. CoVar and Restricted-CoVar
Global Pool Mining Proposal and a fast light tx verification system
Fee confiscation: a solutions to the tragedy of the commons problem
Proof of Bet – An alternative to everything else
Using the version field as more nonce space while maintaining backwards compatibility
Peer Isolation for DoS prevention
Mining hardware “time bomb”
Double-Spend alert system
More on Double-Spend alert system
A solution to the “Tragedy of the Commons” problem in Bitcoin ?
Emulating 2-3 multisig with DAA
Escrow without third parties
APPECoin, a system with total anonymization – key design points
Possible use for the double hash in blocks (forward only second hash preimage)
Bitmessage v1.0: completely broken crypto November 30, 2012
The Bitcoin trasaction fetch memory exhaustion attack (TFMEA) January 23, 2013
Get your peer public addresses, January 23, 2013
CVE-2012-3789 disclosure, January 8, 2013
Vulnerability in BouncyCastle ECDSA signature verification February 19, 2013
The Well Deserved Fortune of Satoshi Nakamoto, Bitcoin creator, Visionary and Genius April 17, 2013
DECOR+ Protocol, May 7, 2014
DECOR protocol, May 2, 2014
SmartSPV Protocol – A better Simplified Payment Verification for Smartphones, April 25, 2014
AppeCoin Anonymous Cryptocurrency Draft, April 24, 2014
The Private Automatic Miner Backbone Protocol (PAMBA), April 19, 2014
Re-Mining, April 3, 2014
MinCen: A new protocol to achieve instant payments, March 20, 2014
The re-design of the Bitcoin block header, March 18, 2014
Safe merged-mining Protocol, February 20, 2014
FastCoin5 Protocol: 5-seconds block intervals for instant payments, February 17, 2014
Flaws in Ethereum “Dagger” PoW function, January 17, 2014
Strict memory hard hash functions, December 31, 2013
Group Signatures with proposed Trapdoor threshold anonymity property, July 30, 2013
Buggy CVE-2013-4627 patch, open new vectors of attack, July 18, 2013
The Bitcoin Eternal Choice for the Dark Side Attack (ECDSA), June 26, 2013
P2pTradeX Protocol, July 05, 2012
Faster SHA-256 ASICs using carry reduced adders, February 7, 2015
Proof of unique blockchain storage, November 3, 2014
Blockpad: Improved Proof-of-work function with decentralization incentives, July 5, 2014
Preventing Geographical Centralization of Cryptocurrency Mining with the LIMIO protocol, July 4, 2014
Bitslog 