(PKE, Or “public-key cryptography”) An encryption scheme, introduced by Diffie and Hellman in 1976, where each person gets a pair of keys, called the public key and the private key. Each person’s public key is published while the private key is kept secret. Messages are encrypted using the intended recipient’s public key and can only be decrypted using his private key. This is often used in conjunction with a digital signature.
The need for sender and receiver to share secret information (keys) via some secure channel is eliminated: all communications involve only public keys, and no private key is ever transmitted or shared.
Public-key encryption can be used for authentication, confidentiality, integrity and non-repudiation.
RSA encryption is an example of a public-key cryptosystem.
alt.security FAQ (http://cis.ohio-state.edu/hypertext/faq/bngusenet/alt/security/top.html).
See also knapsack problem.
- Public key infrastructure
cryptography, communications (PKI) A system of public key encryption using digital certificates from Certificate Authorities and other registration authorities that verify and authenticate the validity of each party involved in an electronic transaction. PKIs are currently evolving and there is no single PKI nor even a single agreed-upon standard for setting up a PKI. However, […]
noun 1. Also called public act, public statute. a law or statute of a general character that applies to the people of a whole state or nation. 2. a branch of law dealing with the legal relationships between the state and individuals and with the relations among governmental agencies. Compare private law. 3. public international […]
noun 1. (in Britain) an act of Parliament that directs compensation to an author for the library loan of his or her book. Public Lending Right noun 1. the right of authors to receive payment when their books are borrowed from public libraries PLR
noun 1. a nonprofit library established for the use of the general public and maintained chiefly by public funds.
noun 1. public service as an elected or appointed government official.