Question: RSA encrypt and decrypt back the plaintext, M=3, if p=7, q=13. Give necessary explanations Hints: C=M mod N; M=C4 mod N; N=pq; ed=1 mod (p-1)(2-1)

RSA encrypt and decrypt back the plaintext, M=3, if p=7, q=13.

RSA encrypt and decrypt back the plaintext, M=3, if p=7, q=13. Give necessary explanations Hints: C=M mod N; M=C4 mod N; N=p*q; e*d=1 mod (p-1)(2-1) EXTENDED EUCLID(m,b)//finds b2 mod m 1. (A1,A2,A3):=(1,0,m); (B1,B2,B3):=(0,1,b); 2. if B3=0 return A3=gcd(m,b); no inverse 3. if B3=1 return B3 = gcd(m,b); B2=b+mod m 43 4. Q= 5. (T1,12,13):=(A1-Q*B1, A2-Q*B2, A3-Q*B3) 6. (A1,A2,A3):= (B1,B2,B3) 7. (B1,B2,B3):= (T1,12,13) 8. goto 2 B3

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Question: RSA encrypt and decrypt back the plaintext, M=3, if p=7, q=13. Give necessary explanations Hints: C=M mod N; M=C4 mod N; N=p*q; e*d=1 mod (p-1)(2-1)

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Question: RSA encrypt and decrypt back the plaintext, M=3, if p=7, q=13. Give necessary explanations Hints: C=M mod N; M=C4 mod N; N=pq; ed=1 mod (p-1)(2-1)