Scientific and electronic apparatus and instruments, namely, cryptographic modules, namely, software for encryption purposes, computerized hardware security module for the random generation of private keys and custody of master keys, all for use in cryptography, hardware and software for digital signature of documents and electronic emails, hardware and software providing cryptographic data security functions, software programs for the generation of credit cards with cryptographic chips; Computers, computer peripheral devices, computer piece and accessories, namely, computer keyboards, tape or disc recorders, scanners, visual display units, mice, electronic pencils, hard discs for computers and printers; Data processing downloadable computer programs for cryptographic means; Downloadable computer programs for the symmetrical keys encoded; Apparatus and instruments for recording, transmission or reproduction of sound, image and audiovisual; Apparatus and magnetic data media, namely, blank magnetic data carriers; Blank floppy disk, Cd-ROM, DVDs