August 2003
Intermediate to advanced
496 pages
11h 59m
English
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RSA Used as a Digital Signature Algorithm
The RSA algorithm can be used for both privacy and digital signing. In Chapter 4, we saw how RSA can be used for keeping secrets, and especially for sharing secret symmetric keys. In this chapter, we look at RSA digital signatures, which is the flip side of the coin. Whereas privacy is achieved by encrypting with the public key and decrypting with the associated private key, digital signing is achieved the other way around, by encrypting with the private key and decrypting with the matching public key.
For digital signatures, it turns out that it is not actually necessary to encrypt the entire original message. It is entirely sufficient, as well as much more efficient, to generate a hash of the original ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.