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Certificate-based encryption : ウィキペディア英語版 | Certificate-based encryption Certificate-based encryption is a system in which a certificate authority uses ID-based cryptography to produce a certificate. This system gives the users both implicit and explicit certification, the certificate can be used as a conventional certificate (for signatures, etc.), but also implicitly for the purpose of encryption. ==Example== A user ''Alice'' can doubly encrypt a message using another user's (''Bob'') public key and his (''Bob's'') identity. This means that the user (''Bob'') cannot decrypt it without a currently valid certificate and also that the certificate authority cannot decrypt the message as they don't have the user's private key (i.e., there is no implicit escrow as with ID-based cryptography, as the double encryption means they cannot decrypt it solely with the information they have).
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Certificate-based encryption」の詳細全文を読む
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