Cryptography using a public key and a corresponding private key. Public-key encryption lets others encrypt for the private-key holder; a digital signature instead lets the holder authenticate messages for public verification.
The published member of a public-key cryptographic key pair. Its association with a particular identity must itself be authenticated; mere knowledge of a purported public key does not establish that identity.
The secret member of a public-key cryptographic key pair, used for decryption or signing according to the scheme. In the RSA cryptosystem the private exponent is not interchangeable with a security proof for textbook signing.
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Public-key cryptography, also known as asymmetric cryptography, is a cryptographic system that uses a pair of keys for secure communication: a public key and a private key. These keys are mathematically related but serve different purposes. 1. **Public Key**: This key is shared openly and can be distributed to anyone. It is used to encrypt messages or verify digital signatures. 2. **Private Key**: This key is kept secret by the owner.
It allows you to do two things: