public-key encryption

public-key encryption

(cryptography)
(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.

See also knapsack problem.
References in periodicals archive ?
Additionally, NuCypher's technology, called proxy re-encryption, is a type of public-key encryption that allows a third-party proxy to transform ciphertexts from one public key to another (using re-encryption keys) without learning anything about the underlying message.
Public-key encryption methods ensure that the data can only be decrypted by the sender and the final receiver of the message, ensuring security of data.
Functional encryption is a novel paradigm for public-key encryption that enables both fine-grained access control and selective computation on encrypted data, as is necessary to protect big, complex data in the cloud.
RSA is one of the first practicable public-key encryption and is widely used for secure data transmission.
Public-key encryption uses two distinct but mathematically related keys--public key and private key.
A signcryption scheme should be more computationally efficient than a native combination of public-key encryption and digital signatures.
Pointcheval, "Key-privacy in public-key encryption," in Advances in Cryptology--ASIACRYPT 2001.
lt;p>Armed with Certicom's ECC public-key encryption technology and its own SSL business, VeriSign expects to be able to enter new markets, it said.
Assymetric or public-key encryption would be used for key management and digital signature.
The most popular type of public-key encryption, invented by Ronald L.
Let us assume, as its advocates claim, that this system could keep our friends and enemies from using our money card with a technology called public-key encryption.

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