New Directions in Cryptography
Short Description
We stand today on the brink of a revolution in cryptography. … rary cryptography is unable to meet the requirements, in that …
Website: groups.csail.mit.edu | Filesize: 260kb
Content
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 cryptogtography
are examined. Widening applications of teleprocess- raphy to insure privacy, however, it currently necessary for the
ing have given rise to a need for new types of cryptographic communicating parties to share a key which is known to no
systems, which minimize the need for secure key distribution one else. This is done by sending the key in advance over some
channels and supply the equivalent of a written signature. This secure channel such a private courier or registered mail. A
paper suggests ways to solve these currently open problems. private 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 is
tation are beginning to provide the tools to solve cryptographic unrealistic to expect initial business contacts to be postponed
problems of long standing. long enough for keys to be transmitted by some physical means.
The cost and delay imposed by this key distribution problem
is a major barrier to the transfer…
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