1.openssl / openssl
General purpose TLS and crypto library
- cryptography
- openssl
- encryption
- tls
- ssl
- decryption
+85 stars
from 31,098 · score 4.45
Trending repositories
Ranked by Attention Score: stars gained over the last 7 complete days
14 repositories by Attention Score · Oct 28, 2026 – Nov 3, 2026 (UTC)
2.Mbed-TLS / mbedtls
An open source, portable, easy to use, readable and flexible TLS library, and reference implementation of the PSA Cryptography API. Releases are on a varying cadence, typically around 3 - 6 months between releases.
+16 stars
from 7,034 · score 2.83
+14 stars
from 14,025 · score 2.71
4.P-H-C / phc-winner-argon2
The password hash Argon2, winner of PHC
+7 stars
from 5,392 · score 2.08
5.libtom / libtomcrypt
LibTomCrypt is a fairly comprehensive, modular and portable cryptographic toolkit that provides developers with a vast array of well known published block ciphers, one-way hash functions, chaining modes, pseudo-random number generators, public key cryptography and a plethora of other routines.
- libtomcrypt
- cryptography
- c
- encryption
+6 stars
from 1,795 · score 1.95
6.wolfSSL / wolfssl
The wolfSSL library is a small, fast, portable implementation of TLS/SSL for embedded devices to the cloud. wolfSSL supports up to TLS 1.3 and DTLS 1.3! Update to wolfSSL 5.9.1 for the latest CVE fixes.
- ssl
- tls
- cryptography
- security
- openssl
- tls13
- +14 more
+4 stars
from 2,980 · score 1.61
7.bitcoin-core / secp256k1
Optimized C library for EC operations on curve secp256k1
+4 stars
from 2,498 · score 1.61
8.B-Con / crypto-algorithms
Basic implementations of standard cryptography algorithms, like AES and SHA-1.
+4 stars
from 2,050 · score 1.61
+3 stars
from 5,019 · score 1.39
10.cossacklabs / themis
Easy to use cryptographic framework for data protection: secure messaging with forward secrecy and secure data storage. Has unified APIs across 14 platforms.
- cryptography-library
- cryptography
- security
- golang
- ios
- swift
- +14 more
+3 stars
from 1,980 · score 1.39
+2 stars
from 4,783 · score 1.10
12.jedisct1 / libhydrogen
A lightweight, secure, easy-to-use crypto library suitable for constrained environments.
+2 stars
from 792 · score 1.10
+2 stars
from 665 · score 1.10
14.miracl / MIRACL
MIRACL Cryptographic SDK: Multiprecision Integer and Rational Arithmetic Cryptographic Library is a C software library that is widely regarded by developers as the gold standard open source SDK for elliptic curve cryptography (ECC).
+1 stars
from 702 · score 0.69