Chosen ciphertext secure authenticated group communication using identity-based signcryption
نویسندگان
چکیده
منابع مشابه
Identity-Based Encryption Secure against Selective Opening Chosen-Ciphertext Attack
Security against selective opening attack (SOA) requires that in a multi-user setting, even if an adversary has access to all ciphertexts from users, and adaptively corrupts some fraction of the users by exposing not only their messages but also the random coins, the remaining unopened messages retain their privacy. Recently, Bellare, Waters and Yilek considered SOA-security in the identity-bas...
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We propose new instantiations of chosen-ciphertext secure identitybased encryption schemes with wildcards (WIBE). Our schemes outperform all existing alternatives in terms of efficiency as well as security. We achieve these results by extending the hybrid encryption (KEM–DEM) framework to the case of WIBE schemes. We propose and prove secure one generic construction in the random oracle model, ...
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(1, 2, 3, 4, 5. College of Information Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P.R.China) * corresponding author 1. E-mail: [email protected] 2. E-mail: [email protected] 3. E-mail: [email protected] 4. E-mail: [email protected] 5. E-mail: [email protected] Abstract. We use hybrid encryption with Fuzzy Identity-Based Encryption (F...
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We propose simple and efficient CCA-secure public-key encryption schemes (i.e., schemes secure against adaptive chosen-ciphertext attacks) based on any identity-based encryption (IBE) scheme. Our constructions have ramifications of both theoretical and practical interest. First, our schemes give a new paradigm for achieving CCA-security; this paradigm avoids “proofs of well-formedness” that hav...
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ژورنال
عنوان ژورنال: Computers & Mathematics with Applications
سال: 2010
ISSN: 0898-1221
DOI: 10.1016/j.camwa.2010.01.005