Additional Shift & Mod

Front

What is a Caesar shift cipher?

Back

A Caesar shift cipher is a type of substitution cipher where each letter in the plaintext is 'shifted' a certain number of places down or up the alphabet.

Front

How does a Caesar shift cipher work?

Back

In a Caesar shift cipher, each letter is replaced by a letter a fixed number of positions down the alphabet. For example, with a shift of 1, A becomes B, B becomes C, etc.

Front

What is meant by 'shift' in a Caesar cipher?

Back

The 'shift' refers to the number of positions each letter in the plaintext is moved in the alphabet to create the ciphertext.

Front

What happens to the shift after each character is encrypted in a variable shift Caesar cipher?

Back

In a variable shift Caesar cipher, the shift increases by one after each character is encrypted.

Front

Encrypt the word 'SOUND' using a Caesar shift cipher with a starting shift of 4.

Back

WTAUL

Front

Encrypt the word 'VIDEO' using a Caesar shift cipher with a starting shift of 23.

Back

SGCEP

Front

Encrypt the word 'PLACE' using a Caesar shift cipher with a starting shift of 16.

Back

FCSVY

Front

What is the result of 72 mod 7?

Back

2

Front

How do you calculate the modulus of a number?

Back

The modulus of a number is the remainder after division of one number by another.

Front

Decrypt the word 'UQGED' using a Caesar shift cipher with a starting shift of 1.

Back

TODAY