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- Title
Selectively chosen ciphertext security in threshold public-key encryption.
- Authors
Kim, Kitak; Park, Jong Hwan; Lee, Dong Hoon
- Abstract
Threshold public-key encryption can control decryption abilities of an authorized user group in such a way that each user of the group can produce only a decryption share and at least t of them should collect decryption shares to recover a message. We present a new threshold public-key encryption that is secure against selectively chosen ciphertext attacks. Semantic security against chosen ciphertext adversaries is the de facto level of security for public-key encryption deployed in practice because many encryption systems are broken in a model of chosen ciphertext security. The security of the proposed system is formally proved without random oracles under a new assumption. We also provide proof of the intractability of our assumption in the generic group model. Copyright © 2012 John Wiley & Sons, Ltd.
- Subjects
PUBLIC key cryptography; COMPUTER network security; CIPHERS; CRYPTOGRAPHY research; COMPUTER security research
- Publication
Security & Communication Networks, 2016, Vol 9, Issue 3, p189
- ISSN
1939-0114
- Publication type
Article
- DOI
10.1002/sec.417