Notation and Cipher

noun

• A technical system of symbols used to represent special things.
  • synonyms: notational system
• A comment or instruction (usually added. )
  • usage: "his notes were appended at the end of the article"; "he added a short notation to the address on the envelope"
  • synonyms: note, annotation
• The activity of representing something by a special system of marks or characters. .

• (n.) Literal or etymological signification.
• (n.) Any particular system of characters, symbols or abbreviated expressions used in art or science, to express briefly technical facts, quantities, etc. especially, the system of figures, letters, and signs used in arithmetic and algebra to express number, quantity or operations.
• (n.) The act or practice of recording anything by marks, figures or characters.
• (n.) The act or practice of recording anything by marks, figures or characters.
• (n.) Any particular system of characters, symbols or abbreviated expressions used in art or science, to express briefly technical facts, quantities, etc. especially, the system of figures, letters, and signs used in arithmetic and algebra to express number, quantity or operations.
• (n.) Literal or etymological signification.

• (n.) A combination or interweaving of letters, as the initials of a name; a device; a monogram; as, a painter's cipher, an engraver's cipher, etc. The cut represents the initials N. W.
• (n.) A character in general, as a figure or letter.
• (n.) A private alphabet, system of characters or other mode of writing, contrived for the safe transmission of secrets; also, a writing in such characters.
• (v.t.) To decipher.
• (v.i.) To use figures in a mathematical process; to do sums in arithmetic.
• (a.) Of the nature of a cipher; of no weight or influence.
• (v.t.) To get by ciphering; as, to cipher out the answer.
• (v.t.) To designate by characters.
• (n.) A character [0] which, standing by itself, expresses nothing, but when placed at the right hand of a whole number, increases its value tenfold.
• (v.t.) To write in occult characters.
• (n.) One who or that which, has no weight or influence.

noun

• A message written in a secret code.
  • synonyms: cypher
• A mathematical element that when added to another number yields the same number.
  • synonyms: zero, 0, nought, cypher
• A quantity of no importance.
  • usage: "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"
  • synonyms: nothing, nil, nix, nada, null, aught, cypher, goose egg, naught, zero, zilch, zip, zippo
• A person of no influence.
  • synonyms: cypher, nobody, nonentity
• A secret method of writing.
  • synonyms: cypher, cryptograph, secret code

verb

• Convert ordinary language into code.
  • usage: "We should encode the message for security reasons"
  • synonyms: code, encipher, cypher, encrypt, inscribe, write in code
• Make a mathematical calculation or computation.
  • synonyms: calculate, cypher, compute, work out, reckon, figure

(DoD) Any cryptographic system in which arbitrary symbols (or groups of symbols) represent units of plain text of regular length, usually single letters; units of plain text are rearranged; or both, in accordance with certain predetermined rules. See also cryptosystem.