  The paper describes several original cryptographic cipher modules (VSEM) that
are based on using one time pseudorandom pad and pseudorandom transpositions.
The VSEM includes 4 modules of encryption that can be applied in combinations.
We studied ability of these modules to secure the private data against attacks
and their speed of encryption. The VSEM encryption was implemented in Fendoff
applications for mobile devices on iOS and Android platforms as well as in
computer application running Window or Mac OS. We describe these applications
designed to encrypt/decrypt various personal data such as passwords, credit
card or bank information as well as to secure content of any text or image
files.
