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tex: crypto changes

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leo 2023-05-25 02:21:05 +02:00
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@ -101,7 +101,7 @@ distributed to the other party via untrusted channels. In 1976 Whitfield Diffie
and Martin Hellman published a paper in which they devised a \emph{public-key
distribution scheme}, which allows the two parties to arrive at a shared secret
by exchanging information via insecure channels with the presence of an
eavesdropper.
eavesdropper. This scheme (or its variations) is in use to this day.
\n{2}{Hash functions}
@ -117,11 +117,12 @@ device has come across, such as when connecting to a website protected by the
famed HTTPS.
The popularity stems from a common use case: the need to identify a chunk of
data. Of course, two chunks of data, two files, frames or packets could
always be compared bit by bit, but that can get prohibitive from both cost and
energy point of view relatively quickly. That is when hash functions come in,
data. Of course, two chunks of data, two files, frames or packets could always
be compared bit by bit, but that can get prohibitive from both cost and energy
point of view relatively quickly. That is when the hash functions come in,
since they are able to take a long input and produce a short output, named a
digest or a hash value.
digest or a hash value. It also does not work the other way around, a file
cannot be reconstructed from the hash digest, it is a one-way function.
\n{3}{Rainbow tables}