# I2PA, U-prove, and Idemix: An Evaluation of Memory Usage and Computing Time Efficiency in an IoT Context

## TL;DR

This paper evaluates the memory and time efficiency of I2PA, U-prove, and Idemix attribute-based credential schemes in IoT devices, highlighting their suitability for resource-constrained environments.

## Contribution

It provides a comparative performance analysis of three cryptographic schemes specifically in IoT contexts, focusing on resource usage during issuance and verification.

## Key findings

- I2PA and U-prove are efficient in memory and time.
- Idemix has lower performance in computing time.
- Results inform suitable scheme selection for IoT devices.

## Abstract

The Internet of Things (IoT), in spite of its innumerable advantages, brings many challenges namely issues about users' privacy preservation and constraints about lightweight cryptography. Lightweight cryptography is of capital importance since IoT devices are qualified to be resource-constrained. To address these challenges, several Attribute-Based Credentials (ABC) schemes have been designed including I2PA, U-prove, and Idemix. Even though these schemes have very strong cryptographic bases, their performance in resource-constrained devices is a question that deserves special attention. This paper aims to conduct a performance evaluation of these schemes on issuance and verification protocols regarding memory usage and computing time. Recorded results show that both I2PA and U-prove present very interesting results regarding memory usage and computing time while Idemix presents very low performance with regard to computing time.