Also found in: Dictionary, Thesaurus, Medical, Financial, Acronyms, Idioms, Encyclopedia, Wikipedia.
See: blank, calculate, designation, indicant, nonentity, symbol

CIPHER. An arithmetical character, used for numerical notation. Vide Figures, and 13 Vin. Ab. 210; 18 Eng. C. L. R. 95; 1 Ch. Cr. Law, 176.
     2. By cipher is also understood a mode of secret writing. Public ministers and other public agents frequently use ciphers in their correspondence, and it is sometimes very useful so to correspond in times of war. A key is given to each minister before his departure, namely, the cipher for writing ciphers, (chiffre chiffrant,) and the cipher for deciphering (chiffre dechiffrant.) Besides these, it is usual to give him a common cipher, (chiffre banal,) which is known to all the ministers of the same power, who occasionally use it in their correspondence with each other.
     3. When it is suspected that, a cipher becomes known to the cabinet where the minister is residing, recourse is had to a preconcerted sign in order to annul, entirely or in part, what has been written in cipher, or rather to indicate that the contents are to be understood in an inverted or contrary sense. A cipher of reserve is also employed in extraordinary cases.

References in classic literature ?
Because there are many ciphers which I would read as easily as I do the apocrypha of the agony column: such crude devices amuse the intelligence without fatiguing it.
I have said enough to convince you that ciphers of this nature are readily soluble, and to give you some insight into the rationale of their development.
The agreement provides that Synergy will be responsible for manufacturing and supplying finished product to Cipher.
a working example of the affine cipher, which uses modular arithmetic to encrypt a message; Break ciphers with techniques such as brute-force and frequency analysis.
MarketsandMarkets selected CIPHER for its innovative range of security system integration services across the banking, financial, healthcare, hospitality, education, legal, and retail verticals.
RtTech's Cipher software delivers on the IIoT promise of affordable, high performance connectivity for old, new, local and remote assets, without having to rip out and replace existing IT/OT (information technology/operational technology) infrastructures or business systems.
Cipher Reports are now available to Wolters Kluwer customers on Kluwer IP Law, the world's leading research solution for global intellectual property professionals, at www.
Keywords: Block cipher modes of operation, cryptography, computer security, network security, one-time key
Objective: In this paper, two modified designs proposed by the author are implemented into hardware and the resulting rate of power consumption is compared with that of the conventional design of the A5/1 stream cipher.
Caesar created another cipher that now bears his name.
It is possible to view Carroll's novel Through the Looking-Glass and What Alice Found There as Carroll's fifth cipher.
Through a business agreement with the Canadian firm, Cipher Pharmaceuticals Inc.