Data Encoding Tutorials - Herong's Tutorial Examples

∟Base64 Encoding

This chapter provides notes and tutorials on Base64 encoding algorithm and implementations. Topics include reviewing Base64 encoding algorithm; W3C implementation and Sun implementation in Java.

Base64 Encoding Algorithm

RFC 1421 - Privacy Enhancement for Email

RFC 1521 - MIME (Multipurpose Internet Mail Extensions)

W3C Implementation of Base64 in Java

Sun Implementation of Base64 in Java

Sun Implementation of Base64 in Java - Test

Goetz' Implementation of Base64 in JavaScript

Goetz' Implementation of Base64 in JavaScript - Test

Conclusions:

• Base64 is a data encoding algorithm that converts any binary data into 64 printable characters.
• Base64 was introduced and modified in RFC 1421 and RFC 1521 as the MIME (Multipurpose Internet Mail Extensions) data encoding standard.
• Both Base64 and UUEncode encoding algorithms use 64 printable characters.

Exercise: Write a program to compare the performance of Base64 encoding with UUEncode. I think UUEncode will perform better, because the output characters are computed instead looked up through an array.

Table of Contents

 About This Book

►Base64 Encoding

 Base64 Encoding and Decoding Tools

 Base64URL - URL Safe Base64 Encoding

 Base32 Encoding

 URL Encoding, URI Encoding, or Percent Encoding

 UUEncode Encoding

 References

 Full Version in PDF/EPUB

Base64 Encoding - Updated in 2022, by Herong Yang