Abstract: A system and method is provided for geo-location-based user authentication and data access control. An exemplary method includes receiving a request from a mobile device to access a user account and user data where the request includes current geo-location data that indicates a current geographical location of the mobile device/ An authentication server then determines whether the current geo-location data is within at least one geo zone that indicates approved geographical areas where the mobile device can access the user account and data. If the current geographical location of the mobile device is determined to be within the approved geographical areas, the server will provide the mobile device with access to the requested account and data.

Abstract: A method for exchanging hidden secret messages includes generating a masking message comprising a quick phrase on a sender's mobile device; receiving a secret message and associating it with the masking message; encrypting the masking message; encoding the secret message using invisible symbols and embedding it into the masking message; sending the masking message to a recipient; receiving a response masking message from a recipient's mobile device; copying the response masking message and detecting the secret message by checking a clipboard content; decrypting the response masking message; and decoding the secret message and rendering it on a sender's keyboard screen. The secret message contains an invisible marker inserted after a first symbol of the masking message for detection and decoding.

Abstract: A system and method is provided for geo-location-based user authentication and data access control. An exemplary method includes receiving a request from a mobile device to access a user account and user data where the request includes current geo-location data that indicates a current geographical location of the mobile device/ An authentication server then determines whether the current geo-location data is within at least one geo zone that indicates approved geographical areas where the mobile device can access the user account and data. If the current geographical location of the mobile device is determined to be within the approved geographical areas, the server will provide the mobile device with access to the requested account and data.