wHTTPS就是在HTTP和TCP之间插入一个密码加密层。
HTTP The Definitive Guide
4.1.2 TCP Streams Are Segmented and Shipped by IP Packets
TCP sends its data in little chunks called IP packets (or IP datagrams). In this way, HTTP is the top
layer in a "protocol stack" of "HTTP over TCP over IP," as depicted in Figure 4-3a. A secure variant,
HTTPS, inserts a cryptographic encryption layer (called TLS or SSL) between HTTP and TCP (Figure
4-3b).
HTTP and HTTPS network protocol stacks
原文：http://www.cnblogs.com/yuanjiangw/p/6354154.html