Top 10 Java Crypto Projects

Cryptomator

491 10,643 9.7 Java

Multi-platform transparent client-side encryption of your files in the cloud

Project mention: Dropbox: How to opt out of 3rd party AI partner access to your Dropbox | news.ycombinator.com | 2023-12-13

the best way to do this is with https://cryptomator.org

Bouncy Castle

9 2,154 9.5 Java

Bouncy Castle Java Distribution (Mirror)

Project mention: Show HN: filippo.io/mlkem768 – Post-Quantum Cryptography for the Go Ecosystem | news.ycombinator.com | 2024-02-01

Note that there may be incompatibilities until NIST has published the final revisions. Some specifications are on Round 3 kyber, others are on FIPS 203.
This one will interoperate with Bouncy Castle as we both use FIPS 203 draft, but won't interoperate with OQS that is still on the Round 3 submission.
See also: https://github.com/bcgit/bc-java/issues/1578

WorkOS

workos.com sponsored

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.
i2p.i2p

114 1,870 9.4 Java

I2P is an anonymizing network, offering a simple layer that identity-sensitive applications can use to securely communicate. All data is wrapped with several layers of encryption, and the network is both distributed and dynamic, with no trusted parties.

Project mention: How to Access Starfiles and Bypass Censorship | /r/starfiles | 2023-12-07

How to setup I2P | How to setup Tor

bcrypt

3 456 4.5 Java

A Java standalone implementation of the bcrypt password hash function. Based on the Blowfish cipher it is the default password hash algorithm for OpenBSD and other systems including some Linux distributions. Includes a CLI Tool. (by patrickfav)
core

4 157 6.2 Java

JCrypTool Core Plug-ins (by jcryptool)

Project mention: Looking for a charming little decryption program | /r/cryptography | 2023-06-28

CrypTool has some similar capabilities in its cryptanalysis suite. https://www.cryptool.org/

crypto

1 68 7.6 Java

JCrypTool Crypto Plug-ins (by jcryptool)
Satergo

8 28 0.0 Java

The desktop wallet for the Ergo cryptocurrency

Project mention: What's a good ergo desktop wallet? now that yoroi is out, i need a new ergo wallet? | /r/ergonauts | 2023-07-08

InfluxDB

www.influxdata.com sponsored

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.
coinex4j

2 7 0.0 Java

CoinEx Exchange API JVM Library
react-native-randomness

1 3 0.0 Java

Secure generatation of random bytes using native functions in Kotlin and Objective-C.
UISCoin

1 0 3.9 Java

Java cryptocurrency made to learn more about Bitcoin.

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).