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RSA is a common public key algorithm, which can be used for encryption and signature. It is a core component of most the security protocols used on the Internet, including the SSL/TLS protocol suite.

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Devising encryption schemes and protocols

I have seen a company hash a string with SHA1 and then RSA encrypt it. Why? I've also seen the hash and plaintext be concatenated and then RSA encrypted. … Why is key = hex( rsa( plainText + hex (sha1( plainText ) ) ) ) used over key = hex( rsa( hex (sha1( plainText ) ) ) ) or my over-complicated example …
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