Science of Secrecy

A 200 page Monoalphabtic cipher has T appear 50 times and is always followed by B. What plain letter is B?

What is the second most common consonant in English writing?

What kind of computer has the potential to render RSA encryption vulnerable?

For RSA encryption, which parameters must be kept secret?

Using a Vigenere cipher, the word “bat” enciphers as “FXK” using a certain key. How does “car” encipher?

Who was the military leader of the French expedition to Egypt at the time of the discovery of the Rosetta Stone?

What does a dowbleth symbol represent in a substitution cipher?

Decipher “YWNANF,” which was encrypted with a Caesar shift of 5 letters.

Which U.S. Cryptologist cracked codes of bootleggers during Prohibition and Nazis in South America during WWII?

In the Playfair Cipher, which digraph below is not a possible way to encipher “to”.

What does “PGP” stand for?

Who invented the RSA encryption algorithm, 5 years before Rivest, Shamir, and Addleman published their work?

Who was the first to publish a procedure for breaking the Vigenere Cipher

What is the name of the class of ciphers in which knowing the encryption key is equivalent to know the decryption key?

King Phillip II of Spain claimed French Cryptanalysts had done this to break messages.

What word comes from the Greek words meaning “covered writing”?

Who invented the Playfair cipher?

Who was the author of the 9th century work whose title translates as On Extracting Obscured Correspondence?

The name of the 200 page French novel written by Georges Perec contains no e’s.

What was the name of the cipher created by H. Feistel which became D.E.S. after several modifications made by the NSA?

What is the multiplicative inverse of 2 mod 15?

In RSA encryption, how many prime factors does the modulus in the public key have?

The word “pool” could be enciphered as “XROW” in all BUT which of the following ciphers?

Hebrew cipher that replaces 1st letter of the alphabet with last, 2nd letter with the 2nd to last, and so on?

In a keyword cipher the plaintext “carpet” is enciphered as “YNRMOT”. How would “act” be enciphered?

In 1962, a direct line of communication was established between the U.S. and U.S.S.R. What cipher was used?

In Navajo, the word “Besh-lo” means “iron fish”. What was this code for in the Codetalkers code in World War II?

The Japanese Type B Cipher Machine used in World War II was given the code name of what color by American cryptanalysts?

Colossus was a machine built by British codebreakers in World War II to cryptanalyze which cipher?

Where did Gilbert Gifford hide smuggled messages to Mary, Queen of Scots?