Classic Crypto
This type of cipher replaces each occurrence of a plaintext letter with another letter of the alphabet
What is a (monoalphabetic) substitution cipher?
Along with China and Russia, this country is one of the US's biggest cyber adversaries
What is Iran?
This is the only known source of truly random numbers
What is nature?
This type of cryptomalware encrypts a hard drive or system until money is paid to the attackers to decrypt it
Computers can write code to simulate randomness, which for many purposes is adequately secure. This is the term for such numbers.
What is pseudorandom numbers?
This former US president created his own polyalphabetic cipher wheel.
Who is Thomas Jefferson?
The number of people in a group needed to create a 50% chance that two of them share a birthday
What is 23?
In this type of cipher, a thin strip of paper (or leather) wrapped around a cylinder is the simple method used to transpose letters in a message when the paper is unraveled.
What is a scytale cipher? ("sit-ah-lee")