pcr-go

pcr-go

This is a Go implementation of the private containment retrieval (PCR) protocol proposed in the paper "Using Amnesia to detect credential database breaches" (USENIX Security '21). Currently, this implementation is for purpose of performance evaluation only.

Performance Evaluation

performance.go can be used to show average PCR message sizes and generation times over a specified number of runs.

Run experiments with default parameters:

go run performance.go

or run experiments with specified parameters. For example,

go run performance.go -keyLength=256 -numHoneywords=1024 -numThreads=2 -enablePC -numRounds=50 -monitorInput="Simba"

Parameters:

• -keyLength=256: the key length of the underlying ECC-ElGamal is 256 bits. Other options include 224, 384, and 512. (Default: 256)
• -numHoneywords=1024: the number of honeywords (denoted by k in the paper) in the target/requester/receiver's set is 1024. (Default: 1024)
• -numThreads=2: both parties run the protocol with 2 threads. (Default: 2)
• -enablePC: Point compression (specified in section 4.3.6 of ANSI X9.62) for the underlying curve is enabled. (Default: enabled)
• -numRounds=50: 50 rounds are required to produce an evaluation result. (Default: 50)
• -monitorInput="Simba": the monitor/responder/sender's input element. (Default: "Simba")

In performance.go, the target's input set is filled with "Simba" and some other randomly generated strings starting with "Simba" (e.g., "Simba1234") to reach the specified set size. So a containment relation holds between the target's input set and the string "Simba", as the monitor's input, while the relation does not hold for any other strings not starting with "Simba".

Citation

@inproceedings {wang2021:amnesia,
title = {Using Amnesia to detect credential database breaches},
author = {Wang, Ke Coby and Reiter, Michael K.},
booktitle = {30\textsuperscript{th} {USENIX} Security Symposium},
publisher = {{USENIX} Association},
month = {Aug},
year = {2021}
}