 Accumulator (cryptography)

In the context of cryptography, an **accumulator** is a cryptographic primitive that allows one to succinctly represent a set of elements such that one can later prove that a specific element is part of that set, without revealing the entire set or requiring its explicit enumeration. Accumulators are primarily used in scenarios where privacy and efficiency are important, such as in zero-knowledge proofs, digital signatures, and secure multi-party computations.