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Group Theory

Definition

Group theory is a branch of abstract algebra that studies algebraic structures known as groups, which consist of a set of elements together with an operation that combines any two of its elements to form a third element. In cryptography, it provides the mathematical foundation for many public-key algorithms and zero-knowledge proofs. It underpins the security of digital signatures and blockchain consensus mechanisms. Understanding group theory is essential for comprehending the security guarantees of cryptographic systems.