Selectively chosen ciphertext security in threshold public-key encryption
- Authors
- Kim, Kitak; Park, Jong Hwan; Lee, Dong Hoon
- Issue Date
- 2월-2016
- Publisher
- WILEY-HINDAWI
- Keywords
- threshold public-key encryption; chosen ciphertext attacks; chosen plaintext attacks
- Citation
- SECURITY AND COMMUNICATION NETWORKS, v.9, no.3, pp.189 - 200
- Indexed
- SCIE
SCOPUS
- Journal Title
- SECURITY AND COMMUNICATION NETWORKS
- Volume
- 9
- Number
- 3
- Start Page
- 189
- End Page
- 200
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/89653
- DOI
- 10.1002/sec.417
- ISSN
- 1939-0114
- 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 (c) 2012 John Wiley & Sons, Ltd.
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Collections - School of Cyber Security > Department of Information Security > 1. Journal Articles
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