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Eccouncil Exam 212-81 Topic 12 Question 25 Discussion

Actual exam question for Eccouncil's 212-81 exam
Question #: 25
Topic #: 12
[All 212-81 Questions]

Early attempt to make substitution ciphers more robust, masks letter frequencies, plain text letters map to multiple cipher text symbols.

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Suggested Answer: D

Integrity

https://en.wikipedia.org/wiki/Cryptographic_hash_function#Verifying_the_integrity_of_messages_and_files

An important application of secure hashes is verification of message integrity. Comparing message digests (hash digests over the message) calculated before, and after, transmission can determine whether any changes have been made to the message or file.


by Gearldine at Jan 23, 2024, 06:29 AM

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Dianne
24 days ago
Hold up, are we sure it's not the Bacon Cipher? I heard that one uses multiple symbols per letter too. Nah, just kidding, Homophonic is the way to go.
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Jose
10 days ago
I think Homophonic Substitution is the best choice here.
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Estrella
1 months ago
Scytale Cipher? Really? That's some ancient stuff. Homophonic Substitution is the clear choice here.
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Kasandra
1 months ago
ADFVGX Cipher? What kind of crazy cipher is that? I'm sticking with good old Homophonic Substitution.
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Catrice
1 months ago
Hmm, I was torn between Playfair and Homophonic, but the multiple cipher text symbols for plain text letters makes me think Homophonic is the way to go.
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Dorothy
2 months ago
I'm not sure, but I think A) Scytale Cipher could also be a possible answer.
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Latosha
2 months ago
I agree with Cecily, Playfair Cipher makes sense for this question.
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Tien
2 months ago
I'm pretty sure it's the Homophonic Substitution Cipher. Masking letter frequencies sounds like a key feature of that one.
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Ora
28 days ago
I agree, the Homophonic Substitution Cipher does mask letter frequencies. That could be the one.
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Junita
29 days ago
I think it might be the Playfair Cipher. It also maps plain text letters to multiple cipher text symbols.
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Nettie
1 months ago
I'm not so sure, I think it might be the Playfair Cipher since it maps plain text letters to multiple cipher text symbols.
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Crista
1 months ago
I think you're right, the Homophonic Substitution Cipher does mask letter frequencies.
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Cecily
2 months ago
I think the answer is B) Playfair Cipher.
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Lashon
2 months ago
I'm not sure, but I think A) Scytale Cipher could also be a possible answer.
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Kasandra
2 months ago
I agree with Gilbert, Playfair Cipher makes sense for this question.
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Gilbert
2 months ago
I think the answer is B) Playfair Cipher.
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