# cryptography

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## cryptography

(krip-tog′ră-fē) [ crypt- + -graphy]
The science and techniques of concealing or disguising information through encoding and decoding. In the health professions cryptography is used to ensure the confidentiality of medical records.
References in periodicals archive ?
This theorem ensures the encryption and decryption phases in the RSA cryptosystem as follows: a plaintext is encrypted by computing and is in turn decrypted by calculating [c.
A cryptosystem that supports threshold decryption generally assumes that n shares of the decryption key (in a secret sharing scheme) have been distributed to n involved parties.
Koblitz, Elliptic Curve Cryptosystems, Mathematics of Computation, Vol 48, 203-209, 1987.
To create the best cryptosystem, it is feasible to use symmetric algorithms since they are extremely fast in process and secure in algorithms comparing to asymmetric algorithms.
We will mention now some of cryptosystem which are based on the discrete logarithm problem as elgamal cryptosystem, and diffie-hellman key exchange, and we will use the multiplication [[].
The paper is organized such that, section (2) discusses the over view of the public key cryptosystem based on number theoretic transforms published in "International journal of Computational Mathematical Sciences", section (3) the brute force attack, section (4) the key agreement resistible against brute force attack, section (5) pubic key encryption and decryption algorithm, section (6) the security aspect and section (7) an illustration and (8) conclusion.
A perfect image cryptosystem is not only flexible in the security mechanism, but also has high overall performance.
A public key cryptosystem and signature scheme based on discrete logarithms, IEEE Transactions on Information Theory, IT-31, 469-473.
An assumption, first codified by Kerckhoffs in the 18th century, holds that security of a cryptosystem should rest entirely in the secrecy of the key, and not in the secrecy of the algorithm.
The RSA cryptosystem has other potential vulnerabilities, however, and researchers have expended considerable effort to expose such weaknesses (SN: 10/3/98, p.
It has consistently opposed the adoption of public-key cryptosystems, preferring more conventional coding schemes that the agency can crack.
A public key cryptosystem is a set of rules for deciphering messages composed via secret key cryptosystems.
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