H ELECTRICITY
H04 ELECTRIC COMMUNICATION TECHNIQUE
H04L TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
H04L9/00 Cryptographic mechanisms or cryptographic; arrangements for secret or secure communications; Network security protocols
H04L9/08 Key distribution; or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
H04L9/0861 Generation of secret information including derivation or calculation of cryptographic keys or passwords
H04L9/0869 involving random numbers or seeds