Ciphertext verification security of symmetric encryption schemes |
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| Authors: | ZhenYu Hu FuChun Sun JianChun Jiang |
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| Affiliation: | HU ZhenYu1,SUN FuChun1 & JIANG JianChun2 1 National Laboratory of Information Science , Technology,Department of Computer Science , Technology,Tsinghua University,Beijing 100084,China,2 Institute of Software,Chinese Academy of Sciences,Beijing 100080 |
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| Abstract: | ![]()
This paper formally discusses the security problem caused by the ciphertext verification,presenting a new security notion named IND-CVA(indistinguishability under ciphertext verification attacks) to characterize the privacy of encryption schemes in this situation. Allowing the adversary to access to both encryption oracle and ciphertext verification oracle,the new notion IND-CVA is slightly stronger than IND-CPA(indistinguishability under chosen-plaintext attacks) but much weaker than IND-CCA(indistinguisha... |
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| Keywords: | encryption privacy integrity reaction attack IND-CPA IND-CCA |
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