Eccouncil 212-81 Exam - Topic 5 Question 62 Discussion

Actual exam question for Eccouncil's 212-81 exam

Question #: 62
Topic #: 5

Bruce Schneier is a well-known and highly respected cryptographer. He has developed several pseudo random number generators as well as worked on teams developing symmetric ciphers. Which one of the following is a symmetric block cipher designed in 1993 by Bruce Schneier team that is unpatented?

APegasus

BBlowfish

CSHA1

DAES

Show Suggested Answer

Suggested Answer: B

Blowfish

https://en.wikipedia.org/wiki/Blowfish_(cipher)

Blowfish is a symmetric-key block cipher, designed in 1993 by Bruce Schneier and included in many cipher suites and encryption products.

by Nohemi at Nov 26, 2025, 03:17 AM

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Venita

8 hours ago

Blowfish was unpatented, right?

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Dierdre

6 days ago

I thought it was AES?

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Tamra

11 days ago

Definitely Blowfish!

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Broderick

16 days ago

Blowfish, hands down. Schneier's probably patented everything else to fund his secret underground lair.

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Peggy

21 days ago

Gotta be Blowfish. I heard Schneier's team made it in their spare time while binge-watching "Cryptography for Dummies."

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Micaela

26 days ago

Hmm, Blowfish sounds like the right answer. Schneier's got a knack for these things.

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Bronwyn

1 month ago

AES seems too modern for that time frame; I think it was developed later. So, it must be Blowfish.

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Glynda

1 month ago

I practiced a question similar to this, and I believe Blowfish was indeed designed by Schneier in '93.

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Vicki

1 month ago

I'm not entirely sure, but I feel like SHA1 is more about hashing than being a symmetric block cipher.

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Howard

2 months ago

I think I remember studying about Blowfish in my cryptography class. It was mentioned as an unpatented cipher, right?

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William

2 months ago

Ugh, I'm struggling with this one. I know Schneier's work, but I can't quite remember the specifics of the ciphers he's developed. I'll have to make an educated guess and hope for the best.

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Cecily

2 months ago

I'm feeling pretty confident about this one. Blowfish seems like the obvious choice - it fits all the criteria in the question. I'm going to go with that.

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Solange

2 months ago

Blowfish, of course! Schneier's baby is the way to go.

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Alpha

2 months ago

I think it's Blowfish. It’s well-known.

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Juan

3 months ago

Okay, let me break this down. Schneier is a cryptographer, so we're looking for a symmetric cipher. It was developed in 1993 and is unpatented, which rules out AES. I'm leaning towards Blowfish, but I'll double-check the other options just to be sure.

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Latrice

3 months ago

Hmm, I'm a bit confused. I know Schneier worked on symmetric ciphers, but I'm not sure which one was developed in 1993 and is unpatented. I'll have to think this through carefully.

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Kirk

3 months ago

I'm pretty sure Blowfish is the answer here. Schneier is known for designing symmetric ciphers, and Blowfish was developed by his team in 1993 and is unpatented.

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Danica

2 months ago

I think Blowfish is definitely the right choice.

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Ammie

3 months ago

Agreed! It's impressive how Schneier's work still holds up today.

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