Top 7 constant-time Open-Source Projects

constant_time_encoding

1 771 4.0 PHP

Constant-Time Character Encoding in PHP Projects

Project mention: PHP RFC: Deprecations for PHP 8.3 | /r/PHP | 2023-05-30

If you want some random string (e.g. for a random filename), you can use bin2hex(random_bytes(16)). This will generate a random 128 bit identifier using the CSPRNG. To be extra safe, use https://github.com/paragonie/constant_time_encoding instead of bin2hex. The constant time encoder prevents some additional (more obscure) attacks.
constantine

5 250 8.6 Nim

Constantine: modular, high-performance, zero-dependency cryptography stack for proof systems and blockchain protocols.

Project mention: A beginner's guide to constant-time cryptography (2017) | news.ycombinator.com | 2024-02-22

Percival cache attacks on Hyperthreading.
I go over some examples here: https://github.com/mratsim/constantine/issues/358#issuecomme...
InfluxDB

www.influxdata.com
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Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
subtle

0 228 0.0 Rust

Pure-Rust traits and utilities for constant-time cryptographic implementations.
o1heap

0 215 1.7 C++

Constant-complexity deterministic memory allocator (heap) for hard real-time high-integrity embedded systems. There is very little activity because the project is finished and does not require further changes.
recrypt

0 140 0.6 Rust

A set of cryptographic primitives for building a multi-hop Proxy Re-encryption scheme, known as Transform Encryption. (by IronCoreLabs)
constant-time-js

0 49 0.0 TypeScript

Constant-time JavaScript functions
gridiron

0 17 4.7 Rust

Rust finite field library with fixed size multi-word values
WorkOS

workos.com
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The modern identity platform for B2B SaaS. The APIs are flexible and easy-to-use, supporting authentication, user identity, and complex enterprise features like SSO and SCIM provisioning.

NOTE: The open source projects on this list are ordered by number of github stars. The number of mentions indicates repo mentiontions in the last 12 Months or since we started tracking (Dec 2020). The latest post mention was on 2024-02-22.