This is Android Shared preference wrapper that encrypts the values of Shared Preferences using AES 128, CBC, and PKCS5 padding with integrity checking in the form of a SHA 256 hash. Each key is stored as a one way SHA 256 hash. Both keys and values are base64 encoded before storing into prefs xml file. By default the generated key is stored in the backing preferences file and so can be read and extracted by root user. Recommend use the user password generated option as added in v0.1.0. The v0.1.0 release was a major refactor of the guts of secure prefs, which is Not backwards compatible yet with older 0.0.1 - 0.0.4 versions. So if you have an existing app using this don't upgrade. I'll be looking to add migration into a later release.