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What is the best encryption library in C/C++ In terms of:
What's your favorite and why do you like it?
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The AWS Encryption SDK is a client-side encryption library designed to make it easy for everyone to encrypt and decrypt data using industry standards and best practices. It enables you to focus on the core functionality of your application, rather than on how to best encrypt and decrypt your data.
Twofish is considered among the fastest encryption standards and is hence favoured for usage among hardware and software enterprises. It is freely available and hence makes it popular. The keys used in this algorithm may be up to 256 bits in length and only one key is needed.
We've used OpenSSL with good success. Portable, standards compliant and easy to use.
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I've used CryptoPP in the past (http://www.cryptopp.com/) and although its API style and programming paradigms take a little getting used to, I liked it in the end. It provides a wide range of symmetric and asymmetric algorithms with much flexibility. Documentation is so-so, the API docs are there but there's little 'high-level' overview and simple sample code. I ended up puzzling together pieces of code from around the net. It was easy to integrate into my project (linked statically). I'm using MSVC - 2003 when I started using it, now switched to 2008. It's portable across several platforms (check out the website). I've always used the default RNG, don't know which one that is.
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