Base64 encoding and decoding of data from Java. Encode and decode methods for Strings, byte arrays, and streams.

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English

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Base64 is needed in many places other than its original use as an encoding format for transferring attachments in email. It can be used anytime binary or arbitrary data needs to be represented in common printable characters. For example to connect to a web page that requires a username and password (basic authentication) you need to Base64 encode the username and password. (See the example)

Example

URL url = new URL("http://....");
HttpURLConnection connection = (HttpURLConnection)url.openConnection();
connection.setRequestProperty(
    "Authorization", 
    "Basic " + Base64.encode(
        username + ":" + password
    )
);      
InputStream in = connection.getInputStream();

Use base64 to add a basic authentication to an HTTP request.

Be aware that Base64 encoding in not encryption. Base64 scrambles the output and it may appear to be unreadable, but it is easily deciphered by anybody with a little experience or time. Base64 encoded strings will often end in one or two equal signs, and they will have only letters, numbers, pluses, and slashes. Once somebody figures out that it is in Base64, it is just a matter of running the decode method on it. Furthermore, real encryption algorithms will change the entire output if one bit in the input changes. If you change a letter in a your message and then re-encode it with Base64, only a few characters will change. Base64 is not a substitute for encryption. Base64 used this way is obfuscation, and rather poor obfuscation at that. It may be a disservice to your users to use Base64 as obfuscation because it gives them the impression that their data is encrypted when it really isn't.

Peachtree Quantum 2010 Best -

For businesses in regulated industries, security is paramount. Peachtree Quantum 2010 offered "Enterprise-Level Security." Administrators could set granular permissions, restricting specific users from viewing sensitive financials or altering historical transactions. The audit trail feature was immutable, meaning once a transaction was entered, it could not be deleted without leaving a record—a critical requirement for compliance.

You own the software and don't have to pay a recurring subscription. peachtree quantum 2010 best

was released as the flagship tier of the Peachtree 2010 accounting line, specifically engineered for businesses that outgrew basic accounting software but weren't ready for mid-market ERP systems. Known today as Sage 50 Accounting , the 2010 Quantum edition focused on high-speed performance, multi-user management, and industry-specific tools. Key Features New to 2010 You own the software and don't have to

Peachtree Quantum 2010 is a comprehensive accounting software designed for small and medium-sized businesses. It is part of the Sage Peachtree family of products, which has been a leading provider of accounting solutions for over 20 years. This software is specifically designed to help businesses manage their financial operations efficiently, streamline their workflow, and make informed decisions. Key Features New to 2010 Peachtree Quantum 2010

Since it is no longer supported, keeping the machine off the public internet is the best way to secure your financial records.

Links

Author	License	Features
Stephen Ostermiller com.Ostermiller.util.Base64	Open source, GPL	Encodes and decodes strings, byte arrays, files, and streams from static methods.
Robert W. Harder Base64	Open source, public domain	Encodes and decodes strings, byte arrays, and objects from static methods. It will encode and decode streams if you instantiate a Base64.InputStream or a Base64.OutputStream.
Roedy Green Java Glossary com.mindprod.base64.base64	Open source, freeware (except military)	Encodes from byte arrays to strings, decodes from strings to byte arrays.
Tom Daley JavaWorld Tip	unknown	Annotated code and nifty graphic that shows how Base64 encoding works. Supports byte array to byte array operations.
Sinotar com.sinotar.algorithm.Base64	Open source, free only for personal use.	Encodes from byte arrays to strings, decodes from strings to byte arrays.

License

The OstermillerUtils library is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.