Explain the two forms of encryption that are often employed in
Internet based communication in e-commerce applications.
1. Assume you have received a Ciphertext C = 48 and you know the
system is using the RSA algorithm. The message was sent to you
using your public key
{e = 7, n = 143}. Can you find out the original plaintext M?
What is your private key?
<RSA Algorithm>
1. Select p, q where p and q are both prime, p- #q 2. Calculate n=p*q 3. Calculate (n)=(p-1)(q-1)< 4. Select integer e, gcd( (n), e) = 1; 1<e<(n). < 5. Calculate d, d=e¹mod< (n), i.e. d*e-1-mod-O-(n)< 6. Public Key 7. Private Key Kpu = {e, n}< Kpr = {d, n}< 8. Encryption C=M(mod n)< 9. Decryption - M=C² (mod-n)<
Explain the two forms of encryption that are often employed in Internet based communication in e-commerce applications.
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