Caesar Cipher
Decrypt this Caesar cipher:
Wklv lv wkh hdvlhvw flskhu
This is the easiest cipher
Decrypt:
slao
a=3
b=2
Odie
Evaluate:
10 mod -84
-74
Decrypt:
uofjuaj
Key: JON
lasagna
Mascot of this club
Garfield
Decrypt this Caesar Cipher:
Zcu natjxkj vuotzy lux eua
Two hundred points for you
Decrypt:
rxjsdyfz
a=7
b=3
comrades
Convert from binary to decimal:
1111111111111
8191
Decrypt:
jltn jkgi flo
Key: ARBUCKLE
just have fun
RSA's security is based upon the inability of an outsider to factor a large number into two of what kind of smaller numbers, numbers which cannot be written as the product of two numbers smaller than themselves?
Prime numbers
Decrypt:
N QNPJ HNUMJWX.
I like ciphers.
decrypt:
gjjqtyqwjst
a=11
b=6
affine is fun
ou receive 400 pages of a secret document encoded by the method in 4. Looking at it, you notice that in the coded message the letter "C" appear 50 times in the 400 pages. Furthermore, all 50 times the "C" is immediately followed by a "M" in the coded message. What letter does the "M" probably represent?
U
Decrypt:
zhv xxmyrlf tqcf
Key: GARFIELD
The need for more secure cryptography blossomed in the 1830s and 1840s, as Samuel Morse and others developed what system that could be used to rapidly communicate messages over long distances?
Telegraph
Decrypt:
Drsc sc k bokvvi lsq crspd
This is a really big shift
Decrypt:
morvuetnuicubm
a=17
b=14
garfield is king
Convert from hexadecimal to binary:
265D
10011001011101
Decrypt:
Upujsg yj ttjkwg
If: yaeiq=glory
Caesar is better
This was commonly used in cryptography during World War II.
a) tunneling
b) personalization
c) van Eck phreaking
d) one-time pad
d) one-time pad
Decrypt:
Nbcm cm u bogihaiom mbczn
This is a humongous shift
Decrypt:
tptmktnfokblnlwrte
a=23
b=17
is it like block chain
A spy decrypting a Caesar Cipher could just try all 26 and be done. To counteract this, some cryptologists suggested a code where the letters were rearranged entirely. Each letter would be assigned one other (possibly the same) letter, and every occurence of the original letter would be replaced by the new letter. "Good", for example, could be enciphered as "abbc". Using this method, how many possible different ciphers could be used?
about 4 times 10 to the 26th
Decrypt:
kmhi ehtb kvcp ise rxbiee
If: Gldpldxtduze=Philadelphia
time that will not return
(key: REVELATION)
This is a mode of operation for a block cipher, with the characteristic that each possible block of plaintext has a defined corresponding ciphertext value and vice versa.
a) footprinting
b) hash function
c) watermark
d) Electronic Code Book
d) electronic code book