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- конфиденциальность- подлинность- неотчуждаемость
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Alice Bob
S
S, OP = encrypt(O,S)
S,PO = decrypt(P,S)
P
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plaintext
PRNG
ciphertext
key
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A5/1,A5/2RC4Salsa20SEAL…
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PRNG
key1
PRNG
key2
PRNG
key3
main key
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DES3DESAESTwofish…
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Alice Bob
A,A’,B’,OP = encrypt(O,B’)
B,B’,A’,PO = decrypt(P,B)
P
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RSACramer-ShoupECC…
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Alice Bob
open
secret:
public:
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Alice Bob
a p q b
A=q^a mod p
p,q
b q pA
B=q^b mod pa p q AB
S = B^a mod p S = A^b mod p
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S S’
MD5RIPEMDSHA1…
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Client Server
ClientHello
ServerHello
Certificate
ServerHelloDone
ChangeCipherSpec
Finished
ChangeCipherSpec
Finished
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