Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: Excellent description of why, what, how of SSL/TLS

"SSL and TLS" is an excellent introduction of what the issues are that drive the need for security and cryptography. Eric explains the issues concisely and in an interesting way, then shows how SSL/TLS address the needs. For one who needs to know what this area is all about before being thrown into a programming project, this is a great resource.