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Symmetric key cryptosystem

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Definition Edit

A symmetric key cryptosystem (also called single-key encryption) is a cryptosystem that uses the same key for both encrypting and decrypting data.

Problems Edit

Three main problems with symmetric key cryptosystems are: (1) in the case of multiple persons, multiple keys are needed; (2) if a key is stolen, security cannot be assured; and (3) distribution of keys must be strictly controlled.

See also Edit

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