No limit to number of passwords or confidential contents that can be saved. No limit to number of files can be created. Files saved can be opened in supported platforms, e.g. MS Windows, Linux, Mac. This will work for users who have multiple OS installed in your PC. A few encryption algorithms, both public and CharNexus's proprietary encryptions, are applied together to ensure cracking is impossible, if not very very hard. Master password is required to save / open a file. Support unicode texts.