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 certificate: A public key certificate is a digitally signed document that serves to validate the sender's authorization and name. A Definition of Public Key Cryptography. Unlike symmetric key algorithms that rely on one key to both encrypt and decrypt, each key performs a unique function. 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. A secret key that can be used to decrypt messages encrypted with the corresponding public or private key. The public key is used to ensure you are the owner of an address that can receive funds. See private key for more details. 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. It can be used to encrypt while the private key can be used to decrypt. 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. An encryption method that uses a two-part key: one private; the other public. One of the two keys is a public key, which anyone can use to encrypt a message for the owner of that key. The keys are asymmetric, the public key is actually derived from the private key. Meaning of public key. Definition of public key certificate in the Definitions.net dictionary. Meaning of public key certificate. Information and translations of public key in the most comprehensive dictionary definitions resource on the web. Public key cryptography is actually a fairly recent creation, dating back to 1973, it uses a public/private key pair. What does public key certificate mean? 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. 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. Applies to : … 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. What is Public Key Cryptography? 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. 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