A cryptographic key that can be obtained and used by anyone to encrypt messages intended for a particular recipient, such that the encrypted messages can be deciphered only by using a second key that is known only to the recipient (the private key).
More example sentences
- Now anyone can use your public key to encrypt email messages to you, but only you alone can use your private key for decryption.
- Click ‘encrypt’ and the message is automatically encrypted with the public key of the recipient.
- When users want to send a secure message to another user, they use the recipient's public key to encrypt the message.
Definition of public key in:
- The British & World English dictionary