Small subgroup confinement attack

The Small Subgroup Confinement Attack (SSCA) is a cryptographic attack targeting certain types of cryptographic protocols, particularly those based on elliptic curve cryptography and finite field operations. It exploits weaknesses in the implementation of cryptographic algorithms that allow the attacker to force the use of a smaller, weaker subgroup within a larger group. ### Concept In many cryptographic schemes, operations are performed over a finite group, like elliptic curves or multiplicative groups of integers modulo a prime number.