New Directions in Cryptography - Department of Computer ...

New Directions in CryptographyInvited PaperWhitfield Diffie and Martin E. HellmanAbstractTwo kinds of contemporary developments in cryp-communications over an insecure channel order to use cryptog-tography are examined. Widening applications of teleprocess-raphy to insure privacy, however, it currently necessary for theing have given rise to a need for new types of cryptographiccommunicating parties to share a key which is known to nosystems, which minimize the need for secure key distributionone else. This is done by sending the key in advance over somechannels and supply the equivalent of a written signature. Thissecure channel such a private courier or registered mail. Apaper suggests ways to solve these currently open conversation between two people with no prior acquain-It also discusses how the theories of communication and compu-tance is a common occurrence in business, however, and it istation are beginning to provide the tools to solve cryptographicunrealistic to expect initial business contacts to be postponedproblems of long enough for keys to be transmitted by some physical cost and delay imposed by this key distribution problemis a major barrier to the transfer of business communications1 INTRODUCTIONto large teleprocessing III propos

New Directions in Cryptography Invited Paper Whitfield Diffie and Martin E. Hellman Abstract Two kinds of contemporary developments in cryp- communications over an insecure channel order to use cryptog-tography are examined. Widening applications of teleprocess- raphy to insure privacy, however, it currently necessary for the

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