RULES:

a$)$ Use a hypothetical block cipher with a block length of $4,$ defined as Ek $(1$b$,2$b$,3$b$,4$b$)$ to $(2$b$,3$b$,1$b$,4$b$)$

Convert English plaintext into a bit string using the table provided

$($A $=0000$ to P $=1111).$

Assume we have a language that uses $16$ letters only.

We must encrypted the plaintext 'FOO' using the following modes.

a$)$

ECB $($Electronic Codebook$)$

b$)$

CBC $($Cipher Block Chaining$)$ with IV $=1010$

c$)$

CTR $($Counter$)$ with ctr $=1010$

$**$Manually encrypt each plaintext into ciphertext. Show all work and step by step how to manually encrypt with each method.