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Oct 3, 2018 at 7:55 comment added kelalaka @Alan_Campbell there were two problems; 1 the message space was limited and, 2. if you are preparing a one-time pad key, you will apply some tests. like the number of 0 = 1, the long runs etc. you don't expect to send all 1 as a key, though it is randomly selected from the key space. When this two is combined, I made my comment. If the message is 'ABCDEFGH' there is no problem. what are the other messages in your short message space?
Oct 3, 2018 at 5:06 comment added Alan Campbell kelalaka The point of a key is for it to be random ENOUGH to mask the original message. All 3 messages are 8 chars long [7 letters, 1 space]. The possibility that the same char [eg. "L" in SELL ALL] could be encrypted the same way, 4 times in an 8-character key, could even CAUSE people to dismiss an encryption possibilty [as you did]. It's the same as a coin-toss being 7 heads in a row - no more unlikely than any other series, and WILL happen if you continue long enough. But if you prefer, think of the message as: "ABCDEFGH". That's no more breakable than my original code.
Oct 1, 2018 at 16:18 comment added kelalaka With high probability, I can say that it is not 'sell all' since the key won't seem random (4 l's). similarly, for 'short it' (2 t's).
Jun 14, 2017 at 19:39 history mod moved comments to chat
Jun 12, 2017 at 5:02 review First posts
Jun 12, 2017 at 11:39
Jun 12, 2017 at 4:59 history answered Alan Campbell CC BY-SA 3.0