On 2012-11-22 10:24 PM, ianG wrote:
giving thanks to wisdom of intellectual property:
http://www.forbes.com/sites/andygreenberg/2012/11/09/meet-the-texas-lawyer-suing-hundreds-of-companies-for-using-basic-web-encryption/
the infringement lies solely in the use of the SSL or TLS �handshake�...
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Actually this does not patent key exchange: It is a snake oil
encryption system that has a superficial resemblance to systems actually
in use.
You have two unspecified pseudo random generators at each end, which
start from the same seed, the pre-shared secret. Then, instead of
directly xoring the key stream with the message, you use the output from
each pseudo random generator to key RC4.
To be actually useful, the random number generator would need to be
cryptographically strong, and if cryptographically strong, the RC4 step
is redundant.
So the patented procedure is not only one that no one uses, it is one
that no one would use.
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