Obfuscation 6.2

Question 1

Obfuscation

Answer 1

The process of making something unclear. It’s harder to read, but not impossible if you know how to read it. It can make source code difficult to read but it doesn’t change the functionality of the code. If you hide information inside an image, its called Steganography.

Question 2

Excluseive OR (XOR) Cipher

Answer 2

Used extensively in cryptography. Output is true, when inputs differ.

Question 3

Substitution Cipher

Answer 3

Replaces a message with a ciphertext. You substitute a plaintext character with a different character according to the ciphertext alphabet.

A = Z, B = R, C = U

Question 4

Caesar Cipher

Answer 4

Every letter is substituted with another letter at a fixed position.

You shift your alphabet over a number of letters.

If A = C, then B = D and so on.

Question 5

ROT13 - Rotate by 13 Places

Answer 5

A standard form of the Caesar Cipher. Commonly seen in online forums if someone doesn’t want to spoil something for others.

HELLO = URYYB

Rotate the alphabet by 13 letters.