CDH Assumption

Definition ∞ The CDH Assumption, or Computational Diffie-Hellman Assumption, states that it is computationally infeasible to calculate a specific value given related public information in certain cryptographic groups. This assumption forms a foundational security premise for many cryptographic systems, including various public-key encryption schemes and digital signature algorithms. Its validity directly impacts the security strength of protocols relying on discrete logarithm problems.
Context ∞ The security of numerous blockchain systems and digital asset transactions rests upon cryptographic assumptions such as CDH. Discussions in crypto news often reference such assumptions when evaluating the robustness of new protocols, especially concerning their resistance to quantum computing threats or advancements in computational power. Understanding the CDH assumption helps assess the long-term viability and security claims of cryptographic implementations.