Format-preserving encryption (FPE) encrypts a plaintext of some specified format into a
ciphertext of identical format—for example, encrypting a valid credit-card number into a valid …

We analyze the security of the Thorp shuffle, or, equivalently, a maximally unbalanced
Feistel network. Roughly said, the Thorp shuffle on N cards mixes any N 1− 1/r of them in …

Probabilistic symmetric encryption have already been widely studied, from a theoretical
point of view. Nevertheless, many applications require length-preserving encryption, to be …

Tor is a popular anonymous Internet communication system, used by an estimated 250,000
users to anonymously exchange over five terabytes of data per day. The security of Tor …

We introduce identity-based format-preserving encryption (IB-FPE) as a way to localize and
limit the damage to format-preserving encryption (FPE) from key exposure. We give …

Block ciphers are widely used building blocks for secure communication systems; their
purpose is to ensure confidentiality of the data exchanged through such systems, while …

Le concept de connaissance a fortement évolué au cours des dernières années. La
connaissance n'est plus perçue comme une substance, mais comme une capacité à …

Abstract In Blockwise On-line Encryption, encryption and decryption return an output block
as soon as the next input block is received. In this paper, we introduce Authenticated …

We analyze the security of the Thorp shuffle, or, equivalently, a maximally unbalanced
Feistel network. Roughly said, the Thorp shuffle on N cards mixes any N^ 1-1/r N 1-1/r of …

La sécurité prouvée est une branche relativement jeune de la cryptologie dont l'objectif est
d'analyser formellement le but ultime des schémas cryptographiques: la sécurité. Elle ne …