#crypto #cryptography #accumulator #gmp


Rust implementanion of a CL universal accumulator

30 releases

0.5.1 Nov 3, 2021
0.5.0 Nov 1, 2020
0.4.0 Oct 30, 2020
0.3.0 Oct 29, 2020
0.1.24 Jul 30, 2020

#520 in Cryptography

46 downloads per month

MIT license

769 lines

Build Status



This is a Rust implementanion of a CL universal accumulator as described here.

An accumulation is a fixed size digest that, along with the witness of an element's addition, can be used to prove an element is a member of a set. The drawback to this solution is that any state changes to the accumulation invalidate the witneses of the other elements in the set, requiring computational resources to update them.

The benefit of CL accumulators is that they support efficient untrusted witness updates. The resource intensive task of updating witnesses can be outsourced to an untrusted party without sacrificing the integrity of the accumulator.

This project is focused on a use case where a central authority is both memory- and processing-constrained. The authority controls the private key and is able to add and delete elements while untrusted workers are able to recalculate witnesses provided they have access to the previous witnesses, the current state of the accumulator, and its public key.


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