IPC Definitions - January 01, 2012

G09C - Definition fr

Definition statement

This subclass covers:

Apparatus or methods for ciphering or deciphering whereby a given sequence of signs (e.g. an intelligible text) is transformed into an unintelligible sequence of signs by transposing the signs or groups of signs or by replacing them by others according to a predetermined system.

Typewriters specially adapted for ciphering or deciphering cryptographic text.

Other apparatus or methods for ciphering or deciphering, e.g. involving the concealment or deformation of graphic data such as designs, written or printed messages.

References relevant to classification in this subclass

This subclass does not cover:

Examples of places where the subject matter of this class is covered when specially adapted, used for a particular purpose, or incorporated in a larger system:

Secret communication

H04K 1/00

Arrangements for conditional access to broadcast information or to broadcast-related services using cryptography

H04H 60/23

Secret digital communication

H04L 9/00

Informative references

Attention is drawn to the following places, which may be of interest for search:

Holographic processes

G03H

Marking record carriers

G06K 1/00-G06K 3/00

Recognizing patterns or reading or recognizing printed or written characters

G06K 9/00

General purpose image data processing

G06T 1/00

Information storage based on relative movement between record carrier and transducer

G11B

Coding, decoding or code conversion, in general

H03M

Pictorial communication

H04N

Security means for wireless communication

H04W 12/00