Was bedeutet Entropy?
Das International Software Architecture Qualification Board (ISAQB) definiert den Begriff „Entropy“ wie folgt:
Unter Entropy versteht man „
In information theory defined as “amount of information” a message has o
“unpredictability of information content”. The entropy of a cryptosystem i
measured by the size of the keyspace. Larger keyspaces have an increase
entropy and if not flawed by the algorithm itself, harder to break than smalle
ones
For secure cryptographic operations it is mandatory to not only use rando
values as input, they should have also a high entropy. The creation of hig
entropy on a computer system is non-trivial and can affect the performance of
system.See 11.1 Information Theory of Schneier-1996 and Whitewood Inc. on “Understanding and Managing Entropy” or SANS “Randomness and Entropy – An Introduction”.
Category: Security
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