Technique to associate an arbitrary alphanumeric sequence to objects in a picture (Method to securely retrieve long PIN codes (8 digits) and arbitrary passwords)
Original Publication Date: 2002-Sep-01
Included in the Prior Art Database: 2003-Jul-23
Up to now the mobile PIN (Personal Identification Number) codes used to access different banking services and functions in the mobile phone are lim- ited to 4 respectively 5 digits. Banks and credit card companies accept PIN codes based on 4 digits be- cause of the usability of their products. 4 or 5 digits to remember is more comfortable. Nevertheless a PIN code with more than 4 or 5 digits would be more secure for new mobile phone services. The here presented technique allows the user to retrieve long PIN codes and passwords without re- ducing the usability of the service. It is based on the use of two different objects. An arbitrary picture and a lattice of values which generation is based on the picture. The generation of the lattice and its use for the storage of PIN codes and passwords is described in the following abstract. The new technique makes use of selecting a group of different pictorial areas in the picture. These areas could be different objects in the picture (disconnected elements), and/or a given contour or edge (connected elements).