Blind Signatures for Untraceable Payments
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David Chaum
Library
Computer Systems Established, Maintained, and Trusted by Mutually Suspicious Groups
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Link
The Dining Cryptographers Problem: Unconditional Sender and Recipient Untraceability
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Online Cash Checks
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Security Without Identification: Card Computers to Make Big Brother Obsolete
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Untraceable Electronic Mail, Return Addresses, and Digital Pseudonyms
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