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Technology Stocks : Security Technologies - Straight Talk
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To: Enam Luf who wrote (62)9/15/1998 1:16:00 PM
From: caly  Read Replies (1) of 206
 
Enam,

Regarding TriStrata, because their system is completely centrally-managed, key recovery is inherent. They will have no problem with exporting the product.

Here's the simplest explanation of a one-time pad I can muster...

If you have a string of data you need encrypted, you generate a truly random string of data ("key") that is the original data's exact length. You then X-OR (exclusive OR) the two strings together to encrypt the original data. To decrypt the string on the other end, the string is simply X-ORed again with the same key.

So the keys to the security are...

1) Generating truly random data to be used as the key and NEVER
re-using it

2) Maintaining the secrecy of the key

Exclusive ORing data is EXTREMELY fast...much faster than using an encryption algorithm. And a one time pad really is virtually unbreakable (as long as the above two issues are taken care of).

But, the downsides are pretty obvious too. You have to have one byte of keying material per one byte of data. If you're transmitting a 2 gig file, that implies a 2 gig key. How realistic is that? Not very. Chances are the keying material will be duplicated, and if that happens, security falls apart. TriStrata doesn't go into detail on their website with regard to this. But you can imagine that there's no way every byte of a video broadcast has one byte of keying material to go along with it.

Enough for now.

calypso
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