Viewing Single Post From: Needle In The Haystack Cipher

Viewing Single Post From: Needle In The Haystack Cipher
Donald	Apr 28 2008, 02:21 PM
Elite member Posts: 454 Group: Trusted Member Member #8 Joined: September 2, 2005	Wouldn't this concept work best with a modern stream cipher? "Revelation" the pseudo random bits shouldn't be really random. To really mask the text, the bits should have a frequency that matches the letter frequency of the English language. If you were using a stream cipher, I think you would want the random data to be really really random. Frequency shouldn't matter since you are xoring with psuedo random data anyway. Due to the constantly sending nature of this cipher, the key should probably be a Self-synchronizing stream cipher (which I don't actually understand) or you could use a clock keyed cipher where the key at any second was a combination of the secret key hashed with the date/time. that way the receiver and the sender wouldn't have to worry about getting out of sync. I could see this being very useful in cases where traffic analysis is a serious threat. For example, an embassy could use a method like this and be transmitting constantly on an open channel to home. Even though the enemy can intercept the channel they won't be able to use traffic analysis to determine when the embassy is involved in intense communications with home, and when they are all in bed sleeping.


Needle In The Haystack Cipher · General