An analogy illustrates the concept of public key exchange by using colors instead of very large numbers After obtaining an authentic copy of each other's public keys, alice and bob can compute a shared. The process begins by having the two parties, alice and bob.
[1][2][3] this shared secret may be directly used as a key, or to derive another key. Key exchange (also key establishment) is a method in cryptography by which cryptographic keys are exchanged between two parties, allowing use of a cryptographic algorithm Elgamal encryption is performed in three phases
The first is purely key exchange, whereas the latter two mix key exchange computations with message computations. Diffie and hellman's 1976 paper new directions in cryptography[5] introduced a radically new method of distributing cryptographic keys, that helped solve key distribution —a fundamental. [1] the cdh assumption involves the problem of computing the discrete logarithm in cyclic groups
