"The design aims to protect transactions from threats posed by quantum computers while remaining compatible with the existing Bitcoin protocol. QSB replaces reliance on elliptic curve security with hash-based assumptions."
"At the core of QSB is a 'hash-to-signature' puzzle. The system hashes a transaction-derived public key using RIPEMD-160 and treats the output as a candidate ECDSA signature."
"Because the puzzle depends on hash properties rather than elliptic curve hardness, it remains resistant to Shor's algorithm. A quantum attacker would gain only a quadratic speedup from Grover's algorithm."
The Quantum Safe Bitcoin (QSB) proposal aims to secure Bitcoin transactions against quantum threats while maintaining compatibility with existing protocols. It addresses vulnerabilities in Bitcoin's reliance on ECDSA signatures, which could be compromised by quantum computers using Shor's algorithm. QSB shifts security to hash-based assumptions, utilizing a 'hash-to-signature' puzzle that creates a proof-of-work condition. This method ensures resistance to quantum attacks, providing significant security margins against potential threats, with an estimated 118-bit second pre-image resistance under Shor's algorithm.
Read at Bitcoin Magazine
Unable to calculate read time
Collection
[
|
...
]