Glossary of Security Terms: Key

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Mozilla (stylized as moz://a) is a free software community founded in 1998 by members of Netscape. A key is a piece of information used by a cipher for encryption and/or decryption. In symmetric-key cryptography, the same key is used for both encryption and decryption. In public-key, the public key is freely available, whereas the private key is kept secret. The public key can encrypt messages that only the corresponding private key can decrypt, and vice versa.