What Is HTTPS?

This section provides a quick introduction to HTTPS (Hypertext Transfer Protocol Secure) - A combination of HTTP (Hypertext Transfer Protocol) and SSL (Secure Socket Layer) or TLS (Transport Layer Security).

What is HTTPS? HTTPS (Hypertext Transfer Protocol Secure) is HTTP over SSL or TLS. HTTP (Hypertext Transfer Protocol) is an application layer protocol used to transfer HTTP requests and HTTP responses for Web based applications. SSL (Secure Socket Layer) or TLS (Transport Layer Security) is a communication layer protocol used to encrypt application data prior to transmission and decrypting it upon arrival to ensure that no one else can read the original application data.

All financial Web sites are using HTTPS now, to protect your financial information being transmitted between your computer and the financial institute server. Since your financial information will be transmitted through many gateway computers, So you don't have to worry about someone else is looking at your information on a gateway computer, like your Internet service provider's server. All they can see is encrypted data, not the original data.

There are several technical notes about HTTPS:

A simple HTTPS server program will be provided in this chapter to confirm some notes mentioned above.

Last update: 2014.

Table of Contents

 About This JDK Tutorial Book

 Downloading and Installing JDK 1.8.0 on Windows

 Downloading and Installing JDK 1.7.0 on Windows

 Downloading and Installing JDK 1.6.2 on Windows

 Java Date-Time API

 Date, Time and Calendar Classes

 Date and Time Object and String Conversion

 Number Object and Numeric String Conversion

 Locales, Localization Methods and Resource Bundles

 Calling and Importing Classes Defined in Unnamed Packages

 HashSet, Vector, HashMap and Collection Classes

 Character Set Encoding Classes and Methods

 Character Set Encoding Maps

 Encoding Conversion Programs for Encoded Text Files

 Socket Network Communication

 Datagram Network Communication

 DOM (Document Object Model) - API for XML Files

 SAX (Simple API for XML)

 DTD (Document Type Definition) - XML Validation

 XSD (XML Schema Definition) - XML Validation

 XSL (Extensible Stylesheet Language)

 Message Digest Algorithm Implementations in JDK

 Private key and Public Key Pair Generation

 PKCS#8/X.509 Private/Public Encoding Standards

 Digital Signature Algorithm and Sample Program

 "keytool" Commands and "keystore" Files

 KeyStore and Certificate Classes

 Secret Key Generation and Management

 Cipher - Secret Key Encryption and Decryption

 The SSL (Secure Socket Layer) Protocol

 SSL Socket Communication Testing Programs

 SSL Client Authentication

HTTPS (Hypertext Transfer Protocol Secure)

What Is HTTPS?

 HttpsHello.java - HTTPS Server Test Program

 HttpsClient.java - HTTPS Client Test Program

 HttpsClient.java Failed with JDK 1.8

 Using SO_LINGER Socket Option

 Connecting to HttpsHello.java with IE

 HttpsEchoer.java - A Better HTTPS Server

 Outdated Tutorials

 References

 PDF Printing Version