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also cy·pher (sī′fər)
1. The mathematical symbol (0) denoting absence of quantity; zero.
2. An Arabic numeral or figure; a number.
3. One having no influence or value; a nonentity.
a. A cryptographic system in which units of text of regular length, usually letters, are transposed or substituted according to a predetermined code.
b. The key to such a system.
c. A message written or transmitted in such a system.
5. A design combining or interweaving letters or initials; a monogram.
v. ci·phered, ci·pher·ing, ci·phers also cy·phered or cy·pher·ing or cy·phered
To solve problems in arithmetic; calculate.
1. To put in secret writing; encode.
2. To solve by means of arithmetic.

[Middle English cifre, from Old French, from Medieval Latin cifra, from Arabic ṣifr, from ṣafira, to be empty (translation of Sanskrit śūnyam, cipher, dot); see ṣpr in Semitic roots.]


References in classic literature ?
As to Tom, Charley's brother, I am really afraid to say what he did at school in ciphering, but I think it was decimals.
For each mode implemented, selections are available for key sizes (128 bit, 192 bit, 256 bit) supported as well as the ciphering direction (i.
Generally, you want to put ciphering devices where they can be protected, observed, and interfaced.