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Science Forum Index » Cryptography Forum » Extent of Usage of a Key...
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| WTShaw... |
 Posted: Thu Jul 24, 2008 11:13 am |
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5) Key Usage as a aspect of strength refers to the amount of a
specific key that is actually used. A flawed DES commandment was to
work the key info as hard as possible and use all of it. I said
faulty because otherwise with a better designed algorithm if with a
specific encryption only part of the key is used, then with another
encryption with the same key a different extraction of key information
would take place, and likely much of the key could remain elusive.
With a huge keyspace and huge amount of key data that might be used
with any particular encryption using a chosen key, the chances that
all or even a meaningful part of that data could be recovered might be
minimized. This all ties in with the section on problematic
encryption because the idea is to present as big a problem as possible
for an attacker who tries to make sense of what he has. Better
strength means doing this well. |
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