# public key definition

Unlike symmetric key algorithms that rely on one key to both encrypt and decrypt, each key performs a unique function. Sometimes referred to as asymmetric cryptography, public key cryptography is a class of cryptographic protocols based on algorithms.This method of cryptography requires two separate keys, one that is private or secret, and one that is public. Public key encryption is a type of cipher architecture known as public key cryptography that utilizes two keys, or a key pair, to encrypt and decrypt data. The public key is also mathematically derived from your private key, but using reverse mathematics to derive the private key would take the world’s most powerful supercomputer many trillion years to crack. THIS DEFINITION IS FOR PERSONAL USE ONLY. It can be used to encrypt while the private key can be used to decrypt. Definition of Public Key Cryptography in the Network Encyclopedia. Information and translations of public key certificate in the most comprehensive dictionary definitions resource on the web. Meaning of public key. Public-key definition is - a cryptographic element that is the publicly shared half of an encryption code and that can be used only to encode messages. An encryption key that can be made public or sent by ordinary means such as an email message. Public Key vs Private Key : Public Key: Private Key: Definition: A published key that can be used to send a secure message to a receiver. Also known as asymmetric-key encryption, public-key encryption uses two different keys at once -- a combination of a private key and a public key. The encrypted message is sent and the recipient uses his or her private key to decrypt it. Public Key Cryptography, also known as asymmetric cryptography, is a popular encryption method developed by Martin Hellman and Whitfield Diffie in 1976 that is used for securing the transmission of data over distrusted networks such as the Internet. Public-key cryptography, or asymmetric cryptography, is an encryption scheme that uses two mathematically related, but not identical, keys - a public key and a private key. Meaning of public key certificate. What does public key certificate mean? The private key is known only to your computer , while the public key is given by your computer to any computer that wants to communicate securely with it. Public key cryptography is actually a fairly recent creation, dating back to 1973, it uses a public/private key pair. One of the two keys is a public key, which anyone can use to encrypt a message for the owner of that key. Definition of public key in the Definitions.net dictionary. What is Public Key Cryptography? 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