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Bionic evolution is an adaptive artificial intelligence technique; it mimics natural evolution process to solve optimization problems. In the paper, we present an improved proxy signature scheme based on bionic evolution. In the scheme, the original private key is generated with bionic evolution algorithm by a successive optimizing process. The optimizing selection algorithm renders effective protection...
Threshold signature is an important signature with additional property; it can achieve effective supervision on signature generating and signature verifying. This paper analyzed the basic principles of threshold cryptosystem and its superiority for application in threshold signature schemes. Considering the security threats and system flaws of present signature schemes, we present a threshold signature...
The security threats and system weakness of present digital fingerprint schemes were analyzed. Combining blind signature and digital fingerprint, an asymmetric digital fingerprint scheme with conditional anonymity based on elliptic curves cryptosystem was presented. The probabilistic encryption algorithm and identity blinding process enable the buyer to be conditionally anonymous in fingerprint embedding...
Analyses were made on the security threats of present subliminal channel schemes, and an anonymous subliminal channel scheme based on (t, n) threshold cryptosystem was presented. The threshold secret sharing of the scheme enables the subliminal message to be recoverable only by no less than t members of the n receivers. The identity blindness algorithm makes the subliminal message sender indistinguishable...
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