Question

What is common between affine cipher and pigpen cipher.

(a) both are mono alphabetic substitution cipher

(b) both are poly alphabetic substitution cipher

(c) both can be cracked using frequency analysis

(d) both are transposition cipher

This question was addressed to me during an online exam.

My doubt is from Cryptography in chapter Cryptography of Data Structures & Algorithms II

Answer 1

The correct option is (c)  both can be cracked using frequency analysis

Both affine cipher and pigpen cipher can be broken using frequency analysis. Pigpen cipher is an example of a geometric substitution cipher.