How Secure Is This Sample Auth Key Exchange?

Unfortunately, I cannot provide an answer because the context you provided does not provide a complete or clear understanding of the topic. The provided text mainly focuses on code snippets, a sample auth key exchange, and some related comments but lacks a comprehensive explanation or a specific question to address. Therefore, I cannot provide an accurate answer.

The above is the detailed content of How Secure Is This Sample Auth Key Exchange?. For more information, please follow other related articles on the PHP Chinese website!