发明名称 |
Verifiable anonymous channel |
摘要 |
<p>Two El Gamal ciphertexts, which are input to a two-input two-output unit switching gates SW forming a permutation network, are randomized with a random number and randomly permuted, and a zero-knowledge proof, which proves the correspondence between the inputs and outputs of the switching gates SW, is output to a verifier without revealing the random number and the random permutation. A decryption unit decrypts ciphertexts from a unit switching gate SW in he last column through the use of a secret key, and proves in zero-knowledge the validity of the decryption without revealing the secret key. A verification unit verifies the proof of each unit switching gate and the proof of the decryption unit. <IMAGE></p> |
申请公布号 |
EP1054527(A2) |
申请公布日期 |
2000.11.22 |
申请号 |
EP20000110775 |
申请日期 |
2000.05.19 |
申请人 |
NIPPON TELEGRAPH AND TELEPHONE CORPORATION |
发明人 |
ABE, MASAYUKI;HOSHINO, FUMITAKA;OHKUBO, MIYAKO;FUJIOKA, ATSUSHI |
分类号 |
H04L9/30;H04L9/32;(IPC1-7):H04L9/30 |
主分类号 |
H04L9/30 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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