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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 periodicals archive ?
Data in Table 1 show that the correlation coefficient is very great between adjacent pixels of the plaintext image, and the correlation coefficient is almost close to 1.
A cipher key is the method used to encode a plaintext and decode a ciphertext.
Once you've downloaded PlainText from the iTunes store and opened it up, you should see a screen similar to the one on the right.
This step is converting the plaintext (message) into DNA form (represented by the four alphabets or letters A, T, C, G).
Some projects described include an artificial dendritic cells algorithm for online break-in fraud detection, a biometric-based security system for plaintext e-mail messages, and an e-performance management system used in federal government organizations of the United Arab Emirates.
With a onetime pad, there are as many bits in the key as in the plaintext.
Instead of encrypting or taking any reasonable measure to defend itself, RockYou kept all of its stored personal data in plaintext files.
At its destination, ciphertext is converted back to plaintext.
The simplest solution is to transfer data in plaintext format using simple data transfer protocol: start, data, checksum and stop bytes (Fig.
Investors using hard copy or even PDFs who want specific information have to wade through lengthy corporate reports, and even online documents are often in a plaintext format with limited search capacity.
Like the plaintext reader/therapist Garner, Catherine beds her subjects, but only to deposit their transgressions in the text's omnipotent magical control.
FIPS Security Level 3 moves beyond the cryptographic protection, requiring also that the devices cannot be disassembled without rendering the device inoperable or without erasing all plaintext secrets.