Susan Zehra

Compute 2^223 mod 353 using the fast modular exponentiation method

Susan Zehra

Modular Exponentiation or Power Modulo. 11^19 mod 23 (Iterative + Factoring Method)

Susan Zehra

(4a) Electronic Codebook (ECB) Solved Example (Step-by-Step)

Susan Zehra

Find the output of the f-function in DES algorithm, given an input and the key to the function

Susan Zehra

Find the period length, output cycle, and the output from a Linear Feedback Shift Register (LFSR).

Susan Zehra

Generate 10 random numbers from a Linear Congruent Generator (LCG), given a seed & parameter values

Susan Zehra

(1a) Compute 240^262 mod 14 using the fast modular exponentiation method.

Susan Zehra

(3d) Determine the AES S-box substitution value for BC which is in hex.

Susan Zehra

(3c) Determine the multiplicative inverse of 15hex.

Susan Zehra

(5e) Using the private key (5, 55) where d=5 and n=55, decrypt y = 3.

Susan Zehra

(5d) Using p = 11, q = 5, and e = 3, encrypt x = 2.

Susan Zehra

(5c) Using RSA key generation scheme with p=11, q=5, e=3, find the public key & private key pair

Susan Zehra

(5b) Determine Euler's phi function Φ(100).

Susan Zehra

(5a) Using Euclidean algorithm, find GCD(174, 66).

Susan Zehra

(3b) Find the PLAIN POLYNOMIAL product of 25hex and 28hex in GF(28) in hex. NO REDUCTION AT THE END.

Susan Zehra

(3a) Find the sum of 54 in HEX and 28 in HEX in GF(28) expressed as a hexadecimal.

Susan Zehra

(2c) In DES, if the 6-bit input to S-box S5 is 52 (in OCTAL), what is its output (in OCTAL)

Susan Zehra

(2a) Find 6 random numbers using linear congruential generator & seed=8 si+1 = (3 si + 2) mod 17

Susan Zehra

(2b) For the LFSR si = ( si-2 + si−4 + si−6 ) mod 2, degree m=6 . Find the max sequence length.

Susan Zehra

(1c) Find the multiplicative inverse of 7 in Z20

Susan Zehra

(1b) Compute Z15

Susan Zehra

Sophia Rizvi (3rd grade) performing live at the Coventry Elementary School Talent Show

Susan Zehra

Zahra Rizvi Student Council Vice-President 4th Grade Speech Virginia 2015

Susan Zehra

DARK ACTIVATED ALERTER USING OPAMP 741

Susan Zehra