Public key & Diffie–Hellman key exchange

Public key Crypto
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random prime a=""; && b="";

prk (a)x(b);=(c)

pk (c)

Decypt with prk (a)(b)
Encypted with pk (c)

Diffie–Hellman key exchange
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mod p=23=prime
Random base g = 5

("Alice sends Bob A = g.a"){
a= 6
g = 5
A = g.a

nA->nB
A =(g.a/5.6) mod p.23 = 8
s = 19.6 mod p.23 = 2
}


("BOB then sends Alice B = g.b"){
b= 15
g = 5
B = g.b

nA<-nB
B = (g.b/5.15) mod p.23 = 19
s = B.a/8.15 mod p.23=2
}


nA->nB
A =(g.a/5.6) mod p.23 = 8=A

s = A.b/19.6 mod p.23 = 2

nA<-nB
B = (g.b/5.15) mod p.23 = 19=B

s = B.a/8.15 mod p.23=2