an algorithm or set of algorithms that systematically convert a sender's intended message text to what appears to be meaningless text, which can be converted back to the sender's original message only by authorized recipients
The method of forming a hidden message. The cipher is used to transform a readable message called plaintext (also sometimes called cleartext) into an unreadable, scrambled, or hidden message called ciphertext. Only someone with a secret decoding key can convert the ciphertext back into its original plaintext. See also ciphertext; plaintext; cryptography.
A system of encrypting a message by which units (usually letters) of ‘plain text' are arbitrarily transposed or substituted according to a pre-determined code (or cryptographic ‘key') to produce ‘ cipher text'. In theory, only those in possession of the key may be able to decrypt the message and reveal the original ‘plain text'.
An algorithm for encryption or decryption. A cipher replaces a piece of information (an element of plain text) with another object, with the intent to conceal meaning. Typically, the replacement rule is governed by a secret key. See also: Encryption, Decryption.
a quantity of no importance; "it looked like nothing I had ever seen before"; "reduced to nil all the work we had done"; "we racked up a pathetic goose egg"; "it was all for naught"; "I didn't hear zilch about it"
Common Information for Public Health Electronic Reporting ? a set of standards or guidelines for data representation and code values which include specifications for representing concepts as well as standard code lists for coded elements. The CDC and its partners in public health have designed and implemented information systems to support surveillance for specific diseases and adverse health conditions.
A group of MC's, usually in a circular formation, who perform either improvised or pre-written lyrics. On a more symbolic note, the circle represents completion-360 degrees, or the idea of coming full circle in thought.