Scheme
Security depend on
Parameter bit length
RSA
Integer Factorization Problem
1976
DSA
Discrete Logarithm Problem
, 
ECDSA
Elliptic Curve Discrete Logarithm Problem
| Scheme | Security depend on | Parameter bit length |
| RSA | Integer Factorization Problem | 1976 |
| DSA | Discrete Logarithm Problem |
|
| ECDSA | Elliptic Curve Discrete Logarithm Problem |
|