Homework #7 MME 529 SOLVED


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Homework #7 MME 529
1. Use Fermat’s Little Theorem to show that 297 is not prime.
2. a) Simplify 55281 mod 37. Show all steps.
b) Do you think similar type of exercises could reinforce secondary students exponent
knowledge and skills?
3. Develop your own 2×2 matrix which could be used to encrypt /decrypt pair of numbers or
symbols mod 31. Provide one example of an encrypted/decrypted pair to illustrate the validity
of what you developed.
4. I provided two proofs of Fermat’s Little Theorem. Which one do you prefer? For the one you
chose, write the proof up in your own words and approach as if you were presenting it to an
Algebra class (which presumably had appropriate background).
5. Consider the RSA Theorem. Where doe the proof break down if p or q is not prime?
6. Pick 2 primes and develop your own RSA encrypt/decrypt scheme. This means provide public
and private keys. Show one example of a number being encrypted and decrypted.
7. Suppose we are in Zp and find that some number a has the property that a
= 1 mod p where
k < p -1 What relation must k have to p ? (in Z13 3 is such a number, for example). Why
must it have the relation you have specified?
8. In Z13 what is log6(7) ? Why?


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