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The wolfSSL embedded SSL library (formerly CyaSSL) is a lightweight, portable, C-language-based SSL/TLS library targeted at IoT, embedded, and RTOS environments primarily because of its size, speed, and feature set. It works seamlessly in desktop, enterprise, and cloud environments as well. wolfSSL supports industry standards up to the current TLS 1.2 and DTLS 1.2, is up to 20 times smaller than OpenSSL, offers a simple API, an OpenSSL compatibility layer, OCSP and CRL support, is backed by the robust wolfCrypt cryptography library, and much more.
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AVR based smartcard/token with ECC and RSA cryptography
...Supported in windows and linux by opensc package. Allow about 64KiB space for keys/certificates. PKCS#15 structure supported. USB token with CCID interface based on xmega128a4u with same features as card. High speed AVR multiple precision arithmetic: squaring, multiplication, exponentiation.
Libecc is an Elliptic Curve Cryptography C++ library for fixed
size keys in order to achieve a maximum speed. The goal of
this project is to become the first free Open Source library
providing the means to generate safe elliptic curves.
The Stanford Javascript Crypto Library is a project by the Stanford Computer Security Lab to build a secure, powerful, fast, small, easy-to-use, cross-browser library for cryptography in Javascript. SJCL is small but powerful. The minified version of the library is under 6.4KB compressed, and yet it posts impressive speed results. SJCL is secure. It uses the industry-standard AES algorithm at 128, 192 or 256 bits; the SHA256 hash function; the HMAC authentication code; the PBKDF2 password strengthener; and the CCM and OCB authenticated-encryption modes. Just as importantly, the default parameters are sensible: SJCL strengthens your passwords by a factor of 1000 and salts them to protect against rainbow tables, and it authenticates every message it sends to prevent it from being modified. ...
inKey - small encryption utility with big encryption block (> 800 000 bit).
This program can protect very sensitive data, such e-mail, which has size up to 100 kilobytes, but processing speed might be too small with the bigger size of source data.
ProcessingTime(data) = O(data ^ 2);
USE IT ONLY TO PROTECT SMALL FILES (~ 100 Kb or a bit bigger).
You can use "PaperBack" to print your 100 Kb encrypted *.iK file to A4 paper and get strong encrypted digital letter.
https://sourceforge.net/projects/paperback
P.S. ...
---- MOVED TO GITHUB! ---- An extensive and efficient set of cryptographic functions written in Javascript. The library aims to obtain maximum execution speed while preserving modularity and reusability. AES, SHA2, Fortuna PRNG, SRP auth, ...
This project is a collection of Open Source crypto cores and implementations relating to high speed cryptanalysis/cracking and complex implementations.
CryptoPy is a pure python implmentation of cryptographic algorithms and applications. The algorithms are developed for readability more than speed. The collection now includes IEEE 802.11i specific algorithms that generated the test vectors for 802.11i.
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This is C++ implementation of russian GOST 28147-89 encryption
and R34.11-94 hash algorithms.
The main objective of project is not speed, but portability. Test suite included.