| slovo | definícia |
public-key encryption
(gcide) | encryption \encryption\ n.
the process of converting messages in ordinary language, or
other information into a secret coded form that cannot be
interpreted without knowing the secret method for
interpretation, called the key.
Note: Encryption is used commonly to allow messages to be
transmitted between parties at a distance without
permitting others to read and understand the message.
It is also used to make data more secure from possible
discovery and uninterpretable by unauthorized people
accessing the data. In order to read an encrypted
message, a party normally requires knowledge of both
the method of encryption and the secret key, which may
be a single word or more complex sequence of
characters. Until recently, transmission of such secret
messages required that the key be transmitted secretly
by some seecure and reliable method to the party
receiving the message. More recently, a mathematical
method was discovered to allow a party to publish an
encoding key (the public key) which allows anyone to
encode a message, but the message thus encoded can only
be decoded by the person possessing a corresponding
key, called the private key. This two-key system is
called the public-key encryption method.
Syn: encoding, coding, enciphering, ciphering, cyphering,
writing in code.
[WordNet 1.5] |
public-key encryption
(foldoc) | public-key encryption
PKE
public-key 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
(http://cis.ohio-state.edu/hypertext/faq/bngusenet/alt/security/top.html)}.
See also knapsack problem.
(1995-03-27)
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