ISSN 1342-2812 Sanitizable Signature with Secret Information

Provably Security Identity-based Sanitizable Signature Scheme Without Random Oracles

A sanitizable signature scheme is a signature which allows a semi-trusted party called sanitizer to hide parts of the original message after the message is signed, without interacting with the signer. A verifier can confirm the integrity of disclosed parts of the sanitized document from the signature. Sanitizable signatures are quite useful in governmental or military offices, where there is a ...

Sanitizable Signcryption: Sanitization over Encrypted Data (Full Version)

We initiate the study of sanitizable signatures over encrypted data. While previous solutions for sanitizable signatures require the sanitizer to know, in clear, the original message-signature pair in order to generate the new signature, we investigate the case where these data should be hidden from the sanitizer and how this can be achieved with encryption. We call this primitive sanitizable s...

1342 - 2812 Level - wise Node Size Distribution of Randomly Generated Regular Trees

1342 - 2812 Key - Substitution Attacks on

Group signatures were introduced by Chaum and Van Heyst [12], and many security requirements for group signatures have been proposed. Bellare, Micciancio, and Warinschi [4] showed that satisfying full-anonymity and full-traceability is sufficient, in the sence that all the above-mentioned requirements are implied by them. Wilson and Menezes [5] introduced a considerable attack against standard ...

Efficient Sanitizable Signatures without Random Oracles (Full Version)

Sanitizable signatures, introduced by Ateniese et al. (ESORICS ’05), allow the signer to delegate the sanitization right of signed messages. The sanitizer can modify the message and update the signature accordingly, so that the sanitized part of the message is kept private. For a stronger protection of sensitive information, it is desirable that no one can link sanitized messagesignature pairs ...