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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?
Suggested Answer: B
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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.
29 comments · newest first
SA
Sarina
6 months ago
Blowfish is definitely the best choice here!
BO
Bok
7 months ago
AES is patented, so it can't be the answer.
CL
Claudia
7 months ago
SHA1 is not a block cipher, so it can't be right.
RO
Rosann
7 months ago
I remember studying it in class. Great cipher!
WI
Willard
7 months ago
Yeah, Blowfish was designed by Schneier.
HA
Haley
7 months ago
Yup, Blowfish is the answer!
EL
Elinore
7 months ago
Wait, is Blowfish really that old?
VE
Venita
8 months ago
Blowfish was unpatented, right?
DI
Dierdre
8 months ago
I thought it was AES?
TA
Tamra
8 months ago
Definitely Blowfish!
BR
Broderick
9 months ago
Blowfish, hands down. Schneier's probably patented everything else to fund his secret underground lair.
PE
Peggy
9 months ago
Gotta be Blowfish. I heard Schneier's team made it in their spare time while binge-watching "Cryptography for Dummies."
MI
Micaela
9 months ago
Hmm, Blowfish sounds like the right answer. Schneier's got a knack for these things.
BR
Bronwyn
9 months ago
AES seems too modern for that time frame; I think it was developed later. So, it must be Blowfish.
GL
Glynda
9 months ago
I practiced a question similar to this, and I believe Blowfish was indeed designed by Schneier in '93.
VI
Vicki
9 months ago
I'm not entirely sure, but I feel like SHA1 is more about hashing than being a symmetric block cipher.
HO
Howard
10 months ago
I think I remember studying about Blowfish in my cryptography class. It was mentioned as an unpatented cipher, right?
WI
William
10 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.
CE
Cecily
10 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.
SO
Solange
10 months ago
Blowfish, of course! Schneier's baby is the way to go.
AL
Alpha
10 months ago
I think it's Blowfish. It’s well-known.
JU
Juan
11 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.
LA
Latrice
11 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.
KI
Kirk
11 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.
VA
Vallie
6 months ago
I've used Blowfish in projects before. Solid cipher!
TE
Tesha
6 months ago
Exactly! And it's unpatented, which is a big plus.
LE
Leonardo
6 months ago
Yeah, it was released in 1993, right?
DA
Danica
10 months ago
I think Blowfish is definitely the right choice.
AM
Ammie
11 months ago
Agreed! It's impressive how Schneier's work still holds up today.