Arrangements for secret or secure communications; Network security protocols

Classification Context

Section:

ELECTRICITY

Class:

ELECTRIC COMMUNICATION TECHNIQUE

Subclass:

TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION

Related Keywords

Child Classifications

Navigate with arrow keys, Enter to open

• H04L 9/06 the encryption apparatus using shift registers or memories for blockwise coding, e.g. D.E.S. systems
• H04L 9/08 Key distribution
• H04L 9/1 with particular housing, physical features or manual controls
• H04L 9/12 Transmitting and receiving encryption devices synchronised or initially set up in a particular manner
• H04L 9/14 using a plurality of keys or algorithms
• H04L 9/18 Encryption by serially and continuously modifying data stream elements, e.g. stream cipher systems
• H04L 9/28 using particular encryption algorithm
• H04L 9/32 including means for verifying the identity or authority of a user of the system
• H04L 9/34 Bits, or blocks of bits, of the telegraphic message being interchanged in time
• H04L 9/36 with means for detecting characters not meant for transmission
• H04L 9/38 Encryption being effected by mechanical apparatus, e.g. rotating cams, switches, keytape punchers
• H04L 9/4 Network security protocols