Encryption

In FreeMind, the whole map or single branches may be encrypted. An encrypted branch has a padlock icon. Encryption is available since FreeMind 0.8.0.

Encryption algorithm

The encryption algorith used in FreeMind is Triple DES or DES, depending on JRE version[TODO]. Both are symmetric-key algorithms built in Java.

For details, search for "PBEWithMD5AndTripleDES".

Troubleshooting

Problem: Maps encrypted with FreeMind running on Java Runtime Environment JRE 1.4 cannot be opened with FreeMind running on Java Runtime Environment JRE 1.6.

Solution: A provisional solution is to stick with Java Runtime Environment JRE 1.4. (Or even 1.5? TODO)

Detail: There is a bug in the PBE key getkey.getAlgorithm() method in JRE 1.4> key.getAlgorithm() returns PBEWithMD5AndDES instead of PBEWithMD5AndDES.

File format

The encrypted branches are stored in FreeMind XML as follows. TODO.

Links

• Triple DES at Wikipedia
• DES - Data Encryption Standard at Wikipedia
• Symmetric-key algorithm at Wikipedia

Implementation

• Cipher - Java API
• Java Cryptography Extension (JCE) - Reference Guide
• Java Cryptography Architecture - Sun Providers Documentation for Java Platform Standard Edition 6