Re: Crack in Computer Security Code Raises Red Flag
Date: 16 Mar 2005 06:09:21 -0800
The "attack" , while at the current edge of feasible computing really
meaningful, even when it is carried out. Even if improved to 2^50 or
would not be meaningful.
Because the attack does not construct messages that are either
or are related in any way. i.e. if I want to sign a letter, one
would presuppose that
the letter would consist of English text. A random string of bits will
not be English text.
Of course, if you are signing random data, then the attack is
Suppose I wanted to send a letter to my stockbroker saying "Buy".
The stock takes a nose dive and I want to repudiate my letter. How do
find two messages M1 and M2 such that both are meaningful text, M1
"Buy" and M2 contains "Sell"? The current attack does not allow
It is not a pre-image attack. And even if it were a pre-image attack,
imagine that I could find M2 such that Hash(M2) = Hash("Buy") AND
M2 contains a meaningful message saying "Sell". M2 is going to be a
(or nearly so) string of bits.
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- Re: Crack in Computer Security Code Raises Red Flag
... The "attack", while at the current edge of feasible computing really ... It is not a pre-image attack. ... M2 contains a meaningful message saying "Sell". ...
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