What is MIRACL? Multiprecision Integer and Rational Arithmetic Cryptographic Library – the MIRACL Crypto SDK – is a C software library that is widely regarded by developers as the gold standard open source SDK for elliptic curve cryptography (ECC).

Why is it different? While many other cryptographic SDKs are focused on PC use, MIRACL also enables developers to build security into highly constrained environments, including embedded, mobile apps and SCADA.

Full documentation can be accessed here:

• About the MIRACL Crypto SDK: Introduction to installation
• MIRACL Explained: Licensing and reference manual

• Reduced program code
• Greatly simplified program development
• Developer-designed APIs
• Rapid implementation, using inline code wrappers, example programs and other innovations

These unique qualities are the reason MIRACL, and the solutions and services built using it, are in use in hundreds of organizations across the world, including BAE Systems, Hitachi, Intel, Panasonic, Toyota and many others.

• An inline C++ wrapper – greatly simplifying program development
• Over 25 example programs in C and C++, covering a wide range of applications, to give development a head start
• Optimization of both embedded processors and RAM, to help developers overcome device and memory constraints
• Compatibility with industry security technologies including AES encryption, RSA public key cryptography, Diffie-Hellman key exchange, DSA digital signature, and others
• A set of tools that enable any new number-theoretic technique to be implemented quickly

The MIRACL library consists of well over 100 routines that cover all aspects of multi-precision arithmetic. Two new data-types are defined - big for large integers and flash (short for floating-slash) for large rational numbers. The large integer routines are based on Knuth’s algorithms, described in Chapter 4 of his classic work ‘The Art of Computer Programming’. Floating-slash arithmetic, which works with rounded fractions, was originally proposed by D. Matula and P. Kornerup. All routines have been thoroughly optimised for speed and efficiency, while at the same time remaining standard, portable C. However optional fast assembly language alternatives for certain time-critical routines are also included, particularly for the popular Intel 80x86 range of processors. A C++ interface is also provided. Full source code is included.

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© 2018 MIRACL UK Ltd., All Rights Reserved.

MIRACL SDK provides developers with an extensive and efficient set of cryptographic functions. For further information about its features and functionalities please refer to https://miracl.com.

MIRACL SDK is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

MIRACL SDK is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more details.

You can be released from the requirements of the license by purchasing a commercial license. Buying such a license is mandatory as soon as you develop commercial activities involving MIRACL without disclosing the source code of your own applications, or shipping MIRACL with a closed source product.

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