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So far I've come across Botan and Crypto++ which both provide reversible (e.g AES) and non-reversible (e.g SHA) encryption. I wondered if anyone can recommend either, or something else?
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There is only one known unbreakable cryptographic system, the one-time pad, which is not generally possible to use because of the difficulties involved in exchanging one-time pads without their being compromised. So any encryption algorithm can be compared to the perfect algorithm, the one-time pad.
The three major encryption types are DES, AES, and RSA. While there are many kinds of encryption - more than can easily be explained here - we will take a look at these three significant types of encryption that consumers use every day.
tinycrypt is a library of cryptographic algorithms with a focus on small, simple implementation.
The OpenSSL crypto library ( libcrypto ) implements a wide range of cryptographic algorithms used in various Internet standards. The services provided by this library are used by the OpenSSL implementations of TLS and CMS, and they have also been used to implement many other third party products and protocols.
OpenSSL has all the functionality that you would expect and it is often already installed (at least on Linux).
It supports asymmetric/symmetric encryption, digital signatures and hashing algorithms. For example, you can use the high-level OpenSSL EVP API for symmetric encryption.
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