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Off-line Digital Cash Schemes Providing Unlinkability, Anonymity and Change
Digital money group blind signature double spending
2017/12/25
Several ecash systems have been proposed in the last twenty years or so,each offering features similar to real cash. One feature which to date has not been provided is that of a payee giving change to...
Sign Change Fault Attacks On Elliptic Curve Cryptosystems
elliptic curve cryptosystem fault attacks smartcards
2009/3/27
We present a new type of fault attacks on elliptic curve scalar
multiplications: Sign Change Attacks. These attacks exploit di erent number
representations as they are often employed in modern crypt...
Cryptanalysis on Chang-Yang-Hwang Protected Password Change Protocol
Authentication Passwords Information security Cryptography
2009/2/12
Recently, Chang et al. proposed an authenticated key agreement and protected
password change scheme. They claimed that their scheme is simple and efficient.
However, in this letter we point out that...