Key Exchange (Key Exchange)
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Description
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.
Parameters
n: maximum size of numbers (prime, parameters, keys), in bits
Table of Algorithms
| Name | Year | Time | Space | Approximation Factor | Model | Reference |
|---|---|---|---|---|---|---|
| Diffie–Hellman key exchange | 1978 | $O(mult(n)$*n) where mult(n) is running time on n-bit multiplication | $O(n)$ | Exact | Deterministic | Time |
| Elliptic-curve Diffie-Hellman (ECDH) | 2006 | $O(mult(n)$*n^{2})? where mult(n) is running time on n-bit multiplication | $O(n)$ | Exact | Deterministic | Time |
Time Complexity Graph
Space Complexity Graph
Space-Time Tradeoff Improvements
