IPC Definitions - January 01, 2012
G09C - Definition
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:
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 |
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 |