منابع مشابه
Smoluchowski's Trapdoor
A mechanism of a gated pore in a membrane is described. Fluxes of gas molecules pass through the pore and produce a pressure gradient in a process that challenges the second law.
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Sanitizable signature (SS) allows a signer to partly delegate signing rights to a predetermined party, called sanitizer, who can later modify certain designated parts of a message originally signed by the signer and generate a new signature on the sanitized message without interacting with the signer. One of the important security requirements of sanitizable signatures is accountability, which ...
متن کاملOn the Impossibility of Basing Trapdoor Functions on Trapdoor Predicates
We prove that, somewhat surprisingly, there is no blackbox reduction of (poly-to-one) trapdoor functions to trapdoor predicates (equivalently, to public-key encryption schemes). Our proof follows the methodology that was introduced by Impagliazzo and Rudich [19], although we use a new, weaker model of separation.
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We describe a method of cryptographically-secure key extraction from a noisy biometric source. The computational security of our method can be clearly argued through hardness of Learning Parity With Noise (LPN). We use a fuzzy commitment scheme so the extracted key is chosen by definition to have uniformly random bits. The biometric source is used as the noise term in the LPN problem. A key ide...
متن کاملPartition-Based Trapdoor Ciphers
This paper deals with block ciphers embedding a trapdoor which consists in mapping a partition of the plaintext space to a partition of the ciphertext space. In a first part, this issue is reduced to the study of the S-boxes of the cipher satisfying a few criteria. Then, differential and linear properties of such S-boxes are assessed and an algorithm to build optimal S-boxes is provided. Finall...
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ژورنال
عنوان ژورنال: Journal of Academic Research in Medicine
سال: 2013
ISSN: 2146-6505,2147-1894
DOI: 10.5152/jarem.2013.23