Re: obscurity for key generation
- From: SOiL <fakesam@xxxxxxxxx>
- Date: Sat, 20 May 2006 14:29:02 GMT
"MajorSoul@xxxxxxxxx" <MajorSoul@xxxxxxxxx> wrote in
news:1147361212.278016.185310@xxxxxxxxxxxxxxxxxxxxxxxxxxxx:
I need to create a system which agree on a key (between A and B)such
without any communication between A and B. so the all algorithms
as DH, RSA, etc are not relevant. the only way I can do it is by
obscurity.
What I am asking is - is that a common problem?
What are the way people usually solve this problem?
Your question is poorly worded/informed, which is why you havn't
gotten much help, but fair and secure key exchange is one of the
biggest problems in cyrptosystem design and implementation.
There are many solutions to the problem. Back in WWII they used to
use code books to do this. Try a modern version.
Generate two identitical DVD's full of secure random numbers, secure
one DVD at each location. Before you wish to send any messages,
agree with the remote about a protocol for choosing a random sequence
off the DVD. Now use the random numbers you have selected as a key
for a secure cryptosystem or one time pad.
In reality all of these so called key exchange restrictions can
usually be lifted by proper planning. If you truly had an
insurmountable key exchange problem, such as national security
secrets, etc., you would already know the answer to your question.
Therefore your question is invalid because you asked it.
.
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