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Introduction to Proxy Re-encryption.

Hold Date
2011-03-10 10:00〜2011-03-10 12:00
Seminar Room 6, Faculty of Mathematics building, Ito Campus
Object person
Chul Sur, Kyushu University

Abstract: In a proxy re-encryption (PRE) scheme, a semi-trusted proxy is allowed to transform a ciphertext under Alice's public key into a new ciphertext under Bob's public key on the same message. However, the proxy cannot learn any information about the messages encrypted under the public key of either Alice or Bob. Due to the nature of PRE, it has received plenty of attention from the research community as fundamental cryptographic function to solve key management problems in various practical applications. In this talk, we introduce the notion of PRE and the definitions for secure PRE schemes. We also give notable PRE schemes according to their characteristics.