Viewing Single Post From: Needle In The Haystack Cipher

Viewing Single Post From: Needle In The Haystack Cipher
Revelation	Apr 27 2008, 08:05 PM
Administrator Posts: 386 Group: Admin Member #1 Joined: August 23, 2005	Imagine Bob and Alice sending secret messages to each other. What does Eve, who is overhearing their conversation, know at this moment? Well, that they are communicating. Now imagine that Alice and Bob are constantly sending pseudo random bits (1) to each other. Only when Bob wants to say something to Alice, he types what he wants to say and then the computer uses a cipher (2) and puts the ciphertext in the bit stream. Now Eve doesn't know whether she intercepted random bits (1) or real text. ----------- This kind of cipher probably exists (and I thought that this was mentioned somewhere before by Donald), but I am sure that we can make a cool one on our own. The strength of the cipher comes with the extreme rate of random bits to ciphertext. Eve would be looking for a needle in a haystack. The main problems for Eve are storage and analysis. (1): 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. (2): I am not quite certain of the cipher to use. The cipher should be key-based, but that doesn't neceserally mean that key used is the same every time. If we could create a new key from the previous key, it would make it harder for Eve to analyse the text. The problems of this cipher are most likely the header and the end. Alice should know if Bob sent something, so the header should be recognisable, thus constant in some way. I wonder what you think of this cipher. Some things still need to be filled in, and I am counting on you guys
	RRRREJMEEEEEPVKLWENFNVJKEEEEEAOLKAFKLXCFZAASDJXZTTTTTTTLSIOWJXMOKLAFJNNKFNXN RAGRBAQEMHIGDJVDSEOXVIYCELFHWLELJFIENXLRATALSJFSLCYTKLASJDKMHGOVOKAJDNMNUITN RRRRLJVEEEEECLYVYHNVPFTAEEEEEMWLMEIRNGLARWJAKJDFLWNTIERJMIPQWOTZEOCXKNUBNXCN RJIRPOWEANFUSNCZVDVZNMSFEKLOEPZLDKDJWSAAAAAAAOERHJCTNCKFRIMVKSOFOMKMANREWNBN RZUDRGXEEEEENFQIDVLQNCKNEEEEEDGLLLLLLAWIOSNCDARLODMTOEJXMILDFJROTKJSDNLVCZNN

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