US PATENT SUBCLASS 380 / 21
.~ Having transmission or distribution of key signal

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


380 /   HD   CRYPTOGRAPHY

9  DF  ELECTRIC SIGNAL MODIFICATION (E.G., SCRAMBLING) {18}
21.~ Having transmission or distribution of key signal

DEFINITION

Classification: 380/21

Having transmission or distribution of key signal:

(under subclass 9) Subject matter wherein a sequence of signals necessary for decoding of an encrypted signal is transmitted over a data link.

(1) Note. The key signal may be transmitted separately from, or together with, the encrypted message signal.

SEE OR SEARCH THIS CLASS, SUBCLASS:

44+, for a key generator for data stream substitution enciphering.