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Automatic Event-Stream Notarization Using Digital Signatures

Some digital signature algorithms (such as RSA) require messages to be padded before they are signed. Secure tokens can use these padding bits as a subliminal channel to embed auditing information in their signed messages. These auditing bits simplify protecting against lost and stolen tokens; breaks of specific protocols, hash functions, and ciphers; and attacks based on defeating a token's tamper-resistance.

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