H04L 9/00 - Definition 
Definition statement
This subclass covers:
Processes or apparatus which
- conceal or obscure intelligible digital information by transforming such information so as to make the information unintelligible to a casual or unauthorized recipient, or
- extract intelligible digital information from such a concealed or obscured representation.
Informative references
Attention is drawn to the following places, which may be of interest for search:
Computer systems | G06F |
Coin-feed or like apparatus with coded identity card or credit card | G07F 7/08 |
Arrangements in the transmission path | H04B |
Diversity reception in general | H04B 7/02 |
Arrangements for preventing the taking of data | H04L 12/22 |
Secret communication | H04K 1/00 |
Special rules of classification
In group H04L 9/00 to H04L 9/32, in the absence of an indication to the contrary, classification is made in the last appropriate place.
Glossary of terms
In this subclass, the following terms or expressions are used with the meaning indicated:
| RSA | Rivest Shamir Aldeman |
Synonyms and Keywords
In patent documents the following abbreviations are often used:
| - - - | - - - |