密钥交换（，也称key establishment）是密码学中两方交换密钥以允许使用某种加密算法的过程。
如果发送方和接收方希望交换加密消息，则双方都必须配有密钥以加密发送的消息和解密收到的消息。它们所需的事物取决于可能使用的加密技术。如果双方使用一本代码，则需要一份相同的編碼簿。如果使用密碼，则需要适当的密钥。如果该密码是對稱密鑰加密，双方需要同一份密钥副本。如果是公钥/私钥结构的公开密钥加密，则双方需要其他人的公钥。
参见
- 密钥
- 密钥管理
- 迪菲-赫爾曼密鑰交換
- 橢圓曲線迪菲-赫爾曼金鑰交換
- 前向安全性
参考资料
拓展阅读
- [https://web.archive.org/web/20141030210530/https://cryptocellar.web.cern.ch/cryptocellar/cesg/possnse.pdf The possibility of Non-Secret digital encryption] J. H. Ellis, January 1970.
- [https://web.archive.org/web/20101116234929/http://www.cesg.gov.uk/publications/media/secenc.pdf Non-Secret Encryption Using a Finite Field] MJ Williamson, January 21, 1974.
- [http://www.fi.muni.cz/usr/matyas/lecture/paper3.pdf Thoughts on Cheaper Non-Secret Encryption] MJ Williamson, August 10, 1976.
- [http://citeseer.ist.psu.edu/viewdoc/summary?doi=10.1.1.37.9720 New Directions in Cryptography] W. Diffie and M. E. Hellman, IEEE Transactions on Information Theory, vol. IT-22, Nov. 1976, pp: 644–654.
- Martin E. Hellman, Bailey W. Diffie, and Ralph C. Merkle, U.S. Patent #4,200,770, 29 April 1980
- [http://cr.yp.to/bib/1988/diffie.pdf The First Ten Years of Public-Key Cryptography] Whitfield Diffie, Proceedings of the IEEE, vol. 76, no. 5, May 1988, pp: 560–577 (1.9MB PDF file)
- Menezes, Alfred; van Oorschot, Paul; Vanstone, Scott (1997). Handbook of Applied Cryptography Boca Raton, Florida: CRC Press. ISBN 0-8493-8523-7. ([http://www.cacr.math.uwaterloo.ca/hac/ Available online])
- Singh, Simon (1999) The Code Book: the evolution of secrecy from Mary Queen of Scots to quantum cryptography New York: Doubleday ISBN 0-385-49531-5
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