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Eccouncil Exam 212-81 Topic 14 Question 18 Discussion

Actual exam question for Eccouncil's 212-81 exam
Question #: 18
Topic #: 14
[All 212-81 Questions]

This algorithm was published by the German engineering firm Seimans in 1993. It is a software based stream cipher using Lagged Fibonacci generator along with a concept borrowed from the shrinking generator ciphers.

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Suggested Answer: D


The FISH (FIbonacci SHrinking) stream cipher is a fast software based stream cipher using Lagged Fibonacci generators, plus a concept from the shrinking generator cipher. It was published by Siemens in 1993. FISH is quite fast in software and has a huge key length. However, in the same paper where he proposed Pike, Ross Anderson showed that FISH can be broken with just a few thousand bits of known plaintext.


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