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1

Yes, it is possible to encrypt a BMP image with any stream cipher. First of all, you need to cut the first 54-byte of the BMP image into another file. At this point, the data part begins. Then the rest can be encrypted with any stream cipher. After that prepend the header to the encrypted file. Here the example with OpenSSL. I will use AES with CTR mode ...


3

TL;DR: Yes, it is. While it is weakened by quantum computers because of Grover's algorithm, it still has enough security margin to be considered "quantum safe". Does Grover's Search Algorithm weaken the XSalsa20 / XChacha20 stream ciphers? Yes, it does, but it only provides a quadratic speed-up compared to classical bruteforce, since both ...


3

As for every benchmark, it all depends on the computing platform. As mentionned in comment, you will find benchmarks at bench.cr.yp.to that include NIST LWC finalists and ChaCha-20. However, most of the architectures considered for those benchmarks are rather high-end computing platforms, and they do not necessarily reflect the landscape of constrained ...


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