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METHOD AND APPARATUS FOR MAKING COCKS CIPHERTEXTS ANONYMOUS WITHOUT CIPHERTEXT EXPANSION
METHOD AND APPARATUS FOR MAKING COCKS CIPHERTEXTS ANONYMOUS WITHOUT CIPHERTEXT EXPANSION
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机译:在不进行密文扩展的情况下使公鸡密文匿名的方法和装置
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摘要
Cocks scheme is an efficient identity-based encryption scheme whose semantic security relies on a standard assumption. In particular, it does not use bilinear maps (a.k.a pairings). Unlike most pairing-based schemes, Cocks scheme is not anonymous. The present embodiments provide methods for anonymizing Cocks ciphertexts. Previous 5 attempts in this direction resulted in longer ciphertexts or were quite impractical. The methods according to the present principles are computationally inexpensive and do not increase the size of the ciphertexts.
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