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A format of one-time pad used by the U.S. National Security Agency, code named DIANA. The table on the right is an aid for converting between plaintext and ciphertext using the characters at left as the key. In cryptography, the one-time pad (OTP) is an encryption technique that cannot be cracked.
Although ciphers can be confusion-only (substitution cipher, one-time pad) or diffusion-only (transposition cipher), any "reasonable" block cipher uses both confusion and diffusion. [2] These concepts are also important in the design of cryptographic hash functions , and pseudorandom number generators , where decorrelation of the generated ...
A sample NSA one-time pad. one time pad (OTP or OTPad) - keying material that should be as long as the plaintext and should only be used once. If truly random and not reused it's the most secure encryption method. See one-time pad article.
In cryptography, a Caesar cipher, also known as Caesar's cipher, the shift cipher, Caesar's code, or Caesar shift, is one of the simplest and most widely known encryption techniques. It is a type of substitution cipher in which each letter in the plaintext is replaced by a letter some fixed number of positions down the alphabet.
George W. Bush using a Motorola STU-III immediately after the September 11 attacks KSD-64 "Crypto-ignition keys" on display at the National Cryptologic Museum in 2005. This is a list of telecommunications encryption terms.
The Soviet systems in general used a code to convert words and letters into numbers, to which additive keys (from one-time pads) were added, encrypting the content. When used correctly so that the plaintext is of a length equal to or less than that of a random key, one-time pad encryption is unbreakable. [25]
Franklin Miller (January 19, 1842 – February 13, 1925) [1] was an American cryptographer, banker, and trustee of Stanford University.He invented the one-time pad in 1882, [2] 35 years before the patent issued to Gilbert Vernam.
The poem code was ultimately replaced with the one-time pad, specifically the letter one-time pad (LOP). In LOP, the agent was provided with a string of letters and a substitution square. The plaintext was written under the string on the pad. The pairs of letters in each column (such as P and L) indicated a unique letter on the square (Q).