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Eccouncil Exam 212-81 Topic 3 Question 37 Discussion

Actual exam question for Eccouncil's 212-81 exam
Question #: 37
Topic #: 3
[All 212-81 Questions]

Changes to one character in the plain text affect multiple characters in the cipher text, unlike in historical algorithms where each plain text character only affect one cipher text character.

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Suggested Answer: D

Vigenre

https://en.wikipedia.org/wiki/Vigen%C3%A8re_cipher

The Vigenre cipher is a method of encrypting alphabetic text by using a series of interwoven Caesar ciphers, based on the letters of a keyword. It employs a form of polyalphabetic substitution.

First described by Giovan Battista Bellaso in 1553, the cipher is easy to understand and implement, but it resisted all attempts to break it until 1863, three centuries later. This earned it the description le chiffre indchiffrable (French for 'the indecipherable cipher'). Many people have tried to implement encryption schemes that are essentially Vigenre ciphers. In 1863, Friedrich Kasiski was the first to publish a general method of deciphering Vigenre ciphers.


Contribute your Thoughts:

Lilli
3 days ago
I agree with Lemuel, because diffusion ensures that changes in plain text affect multiple characters in the cipher text.
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Caprice
5 days ago
This sounds like the concept of diffusion in modern cryptography. I'll go with D.
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Lemuel
10 days ago
I think the answer is D) Diffusion.
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