3 ms·
BTW truly random numbers can not be used for live communications encryption as they can not be reproduced by the recipient UNLESS they have a EXACT replica of t
by rawmodz 8y ago
BTW truly random numbers can not be used for live communications encryption as they can not be reproduced by the recipient UNLESS they have a EXACT replica of the random numbers or its audio image in a recording (See: American SIGSALY machine during WW2). However pseudo-random numbers can be reproduced live by the recipient via prearrangement but not easily by an outsider (See: German ENIGMA machine also WW2 vintage).
POTUS Thomas Jefferson invented a really amazing encryption machine in 18th century using a quasi-pseudo-random arrangement which utilized the ancient encryption art of Steganography. (See: Jefferson Wheel Cypher). It helped us beat the Brits here in USA and abroad. :P
- gnur 8y agoI think you are talking about a OTP here, which needs to be shared before communicating. But random numbers are also used to generate public/private key combinations, which can be used for live communication after a handshake.
- vegardx 8y agoYou are talking about symmetric keys. There's nothing random about it, except for perhaps the generation of said key. If you have a mechanism to generate the same key on both ends, then the mechanism /is/ the key.
- DanBC 8y agoThey're talking about a product that used one time pads, and you know they must be random to work. The pads were put on vinyl records, and used to encode audio signals for telephone lines. https://en.wikipedia.org/wiki/SIGSALY https://en.wikipedia.org/wiki/SIGSALY
- j16sdiz 8y agoBut random number are basic construct of higher level protocol. See Diffie–Hellman key exchange.