A Parallel Processing Attack is a type of cryptographic or computational assault where an adversary utilizes numerous parallel computing resources to accelerate a process that is designed to be sequential. This attack seeks to subvert systems relying on a fixed, verifiable time delay for computation. It attempts to bypass intended security properties by brute force parallelization.
Context
Parallel processing attacks are a significant concern for cryptographic primitives like Verifiable Delay Functions (VDFs), which are specifically designed to resist such efforts by ensuring sequential computation. In blockchain contexts, preventing these attacks is vital for maintaining the integrity of randomness generation and fair leader election. This secures decentralized networks against manipulation.
Cryptanalysis revealed that parallel computation bypasses the sequential time delay in VDFs, challenging the security of verifiable randomness primitives.
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