10.5. Applied Cryptography
Up to this point, you've learned a great deal about the foundations of cryptography, the inner workings of various cryptographic algorithms, and the use of the public key infrastructure to distribute identity credentials using digital certificates. You should now feel comfortable with the basics of cryptography and prepared to move on to higher-level applications of this technology to solve everyday communications problems. In the following sections, we'll examine the use of cryptography to secure electronic mail, web communications services, electronic commerce, and networking.
10.5.1. Electronic Mail
We have mentioned several times that security should be cost effective. When it comes to electronic mail, simplicity ...