« on: February 12, 2014, 08:23:48 pm »
It could be numbers, symbols, or letters that need to be skipped. This is for encrypting passwords and what not to make it impossible for them to decrypt. Now if me and someone were exchanging encrypted messages. Obviously that other person would have the key and would be able to figure out what doesn't belong. Also these are not programs, I know nothing of those sort of things, though very soon will be trying for I have an ingenious idea. But for the time being these are written out on paper and calculated in my head.
So the key explains which numbers and letters need to be skipped? Rather than being more like a password to unlock the string, as a 'key' often is in cryptography, this is more of a series of instructions? Or would the other person decrypt the string, even with the random noise added, then remove the random symbols simply by taking out the stuff that doesn't make sense?
When you say "impossible to decrypt" do you mean "impossible to decrypt without the key" or is this a one way function from which the original text cannot be retrieved?