In the public key algebraic encryption system the ciphered message is produced as two or three matrix functions of the plaintext message and a random error. In the matrix functions, only non-invertable matrices are used as coefficients.
The subject invention relates to a method for collecting the invoice amount of open invoices issued by a service provider to a customer. The arrangement for implementing the method comprises a service and operator server (90, 10) enabled to perform the respective steps, an evaluation unit (20) connected to the operator server (10), a transaction database (12) and POS terminals (40, 50, 60).
Removable covering paint scheme of layers arranged on a heat sensitive carrier, thermal printer, and method for thermal printing of such carrier
This invention relates to a removable multilayered aqueous flexo covering paint scheme of layers arranged on a heat sensitive carrier (1) provided by a heat sensitive layer (2) to be coloured by applying heat, and a coat of lacquer (3) containing 70% acrylate oligomer, 22% acrylate monomer, 5% photo-initiator and 3% silicone is arranged on the heat sensitive layer (2); a disperse parting layer (4) containing 20-35% soot paste, 25% aqueous acrylate emulsion, 6% calcined kaolin, 1% antifoam agent and spread improver, 3% rheological modifier and 45% water is arranged on the coat of lacquer (3); and a covering paint layer (5) containing carbon nanotubes functionalized by hydroxyl, carbonyl and carboxy groups is arranged on the disperse parting layer (4). A method and apparatus for thermal printing of a carrier (1) preprinted by the removable multilayered aqueous flexo covering paint scheme of layers and provided by a heat sensitive layer (2) to be coloured by applying heat is also disclosed.
The invention is an apparatus for checking the quality of hand disinfection, comprising: a housing (12); a hand inspection cavity (80) formed on the front side of the housing to receive the user’s hand; light sources arranged to emit ultraviolet (UV), visible light or infrared (IR) radiation into the interior of said test cavity; at least one digital camera arranged in the hand examination cavity and adapted to record images in the UV, visible light or IR spectrum; a container for storing hand sanitizing medium; a dosing unit for dispensing a measured amount of disinfectant medium; an input device (40) for locally controlling the operation of the apparatus; a display (50), a processor unit; and an internal storage unit.
Method and system for the authentic determination of the identity of an electronic document with itself at a later date or with a copy thereof
Method and system for determination of authenticity of an electronic document by comparing the document in question with itself at a later date or with a copy thereof, which method comprises two phases wherein the first phase is the entry of the original document and the second phase is the verification of the identity between the document to be authenticated and the original one.