(This functionality is depricated)
The other encryption methods built-into db4o, is called simple encryption. To use it, the following two methods have to be called, before a database file is created:
.NET:
Db4o.Configure().Encrypt(true);
Db4o.Configure().Password("yourEncryptionPasswordHere");
The security standard of the built-in encryption functionality is not very high, not much more advanced than "substract 5 from every byte". This is great for systems with limited resources, or where the encryption needs to be done as quickly as possible.