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- W2143671749 abstract "Mix chains as proposed by Chaum allow sendingun traceable electronic e-mail without requiring trust in a single authority: messages are recursively public-key encrypted to multiple intermediates (mixes), each of which forwards the message after removing one layer of encryption. To conceal as much information as possible when using variable (source routed) chains, all messages passed to mixes should be of the same length; thus, message length should not decrease when a mix transforms an input message into the corresponding output message directed at the next mix in the chain. Chaum described an implementation for such length-preserving mixes, but it is not secure against active attacks. We show how to build practical cryptographically secure length-preserving mixes. The conventional definition of security against chosen ciphertext attacks is not applicable to length-preserving mixes; we give an appropriate definition and show that our construction achieves provable security." @default.
- W2143671749 created "2016-06-24" @default.
- W2143671749 creator A5056679254 @default.
- W2143671749 date "2003-01-01" @default.
- W2143671749 modified "2023-10-06" @default.
- W2143671749 title "Provably Secure Public-Key Encryption for Length-Preserving Chaumian Mixes" @default.
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- W2143671749 doi "https://doi.org/10.1007/3-540-36563-x_17" @default.
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