waterlubber wrote:Anyone know about "ideal" calculators? Basically, the most digits (and with a memory, hopefully) that you can cram into a four-function. RSA is...calculationally demanding, to say the least.
jimmy-bond wrote:On a practice test, I had the question "Encode DREW BREES using the keyword VEAR." It displayed VEAR as a 2x2 matrix, so this is clearly a Hill cipher problem. I tried encrypting it as I would a normal Hill cipher but got a different answer than the answer key. I'm pretty sure I did it wrong, so can someone explain to me how to do this problem and the solution you get? Thanks.
dragonfruit35 wrote:Which way did you write the DREW BREES matrix? With the letters readable horizontally or vertically?
jimmy-bond wrote:dragonfruit35 wrote:Which way did you write the DREW BREES matrix? With the letters readable horizontally or vertically?
Idk how to put a matrix but I did
D R
E W
B R
E E
S
Longivitis wrote:jimmy-bond wrote:dragonfruit35 wrote:Which way did you write the DREW BREES matrix? With the letters readable horizontally or vertically?
Idk how to put a matrix but I did
D R
E W
B R
E E
S
It's supposed to be
D
R
E
W
B
R
E
E
S
(Z)
and then multiply by the 2x2 matrix keyword
UTF-8 U+6211 U+662F wrote:Longivitis wrote:jimmy-bond wrote:Idk how to put a matrix but I did
D R
E W
B R
E E
S
It's supposed to be
D
R
E
W
B
R
E
E
S
(Z)
and then multiply by the 2x2 matrix keyword
You can't multiply those two matrices. They don't line up. It's supposed to be
the VEAR matrix multiplied by
and then the VEAR matrix multiplied by
etc., etc., I believe.
Although annoyingly, it's not evenly split into chunks of 2 so you'd have to insert an extra letter at the end.
Longivitis wrote:UTF-8 U+6211 U+662F wrote:Longivitis wrote:
It's supposed to be
D
R
E
W
B
R
E
E
S
(Z)
and then multiply by the 2x2 matrix keyword
You can't multiply those two matrices. They don't line up. It's supposed to be
the VEAR matrix multiplied by
and then the VEAR matrix multiplied by
etc., etc., I believe.
Although annoyingly, it's not evenly split into chunks of 2 so you'd have to insert an extra letter at the end.
Yeah, that's what I meant guess I really wasn't clear enough.
SpicyCurry wrote:So quick questions. Around how many questions are there on a code busters test at the various levels (regionals, state, nationals)? Also I know I depends on the type of cipher, but what is a good average time per cipher?
l0lit wrote:SpicyCurry wrote:So quick questions. Around how many questions are there on a code busters test at the various levels (regionals, state, nationals)? Also I know I depends on the type of cipher, but what is a good average time per cipher?
You can expect ideally 15 questions per test, and a good solve time ranges from like 1 min (a caesar or something) to like 10 mins (no hint patristo?). Again, those times depend completely on what you're comfortable with.
ducharmezac wrote:Does anyone have any tricks on how to do xenocrypt without knowing spanish? I feel like there's gotta be a trick somewhere that I'm missing.
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