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n. A system of cryptography.


In cryptography, a cryptosystem is a suite of cryptographic algorithms needed to implement a particular security service, most commonly for achieving confidentiality ( encryption).

Typically, a cryptosystem consists of three algorithms: one for key generation, one for encryption, and one for decryption. The term cipher (sometimes cypher) is often used to refer to a pair of algorithms, one for encryption and one for decryption. Therefore, the term cryptosystem is most often used when the key generation algorithm is important. For this reason, the term cryptosystem is commonly used to refer to public key techniques; however both "cipher" and "cryptosystem" are used for symmetric key techniques.

Usage examples of "cryptosystem".

This most widely distributed and extensively used of Japan's naval cryptosystems, in which about half her naval messages were transmitted, was already the target of three other cryptanalytical units—a 16th Naval District group under Lieutenant Rudolph J.

Crypto experts won’t trust a cryptosystem until they have attacked it, and they can’t attack it until they know the basic cryptanalytical techniques, and hence the demand for a document like this modern, annotated version of the Cryptonomicon.

Referat IVa: testing of suggested German military cryptosystems and telephone scramblers for resistance to crypt-analysis: examination of inventions.

Referat IVa, which tested German cryptosystems, frequently with mathematical tools to calculate theoretical limits of security and to find improvements, was headed by mathematician Dr.

In January and February of 1943, the B-Dienst mastered British naval cryptosystems so fully that it was even reading the British "U-Boat Situation Report," which was regularly broadcast to the commanders of convoys at sea, telling them the known and presumed locations of U-boats!

The outfit was split up into sections for its three major cryptologic functions : (1) the development, production, and distribution of naval cryptosystems, headed by Safford.

They did not even attempt to solve medium and high-echelon messages, couched in cryptosystems far beyond their ability.

They concentrated instead on three simpler cryptosystems of the lowest level of command.

The Germans did not solve the cryptosystems of the top Soviet military commands—primarily the 5-digit codes.

The apparent failure of German cryptanalysts to solve Russia's strategic cryptosystems, with the valuable information that they concealed, led one German crypt-analyst to adjudge that Russia lost World War I in the ether and won World War II there.

The computer has relieved him of much drudgery, but modern cryptosystems involve much more work than older ciphers.

On this basis, the United States probably has the most secure cryptosystems and the most informative communications intelligence in the world.

This principle arranges a nation's cryptosystems in a hierarchy in which front-line systems are simple and diplomatic systems secure and more complex.

Ladislas Farago's The Broken Seal (Random House, 1967, 441 pages) tells about the development, theft, and solution of Japanese cryptosystems before Pearl Harbor.

Trithemius suggests forty major cryptosystems: in one, only the initial letters count.