9 Apparatus and instruments designed for the security and tracing of audiovisual content, namely, stationary or portable computers, computer servers, routers, automatic computer network switches, computer and teleprocessing terminals, wired and cordless telephones, personal digital assistants ("PDAs") including digital or analog watermarking devices of analog or digital data or flows, and in particular audiovisual or radio flows; apparatus and instruments for monitoring and supervising television and radio broadcast of audiovisual content and publication of audiovisual content on networked computer servers, namely, Internet-type portals and mobile network portals; computer database servers; encoded smart cards for identification of persons and things or authentication of access rights; apparatus and instruments for tracing and imprinting the ownership of audiovisual content, namely, digital watermarking software and signature software; apparatus and instruments for encrypting/decrypting audiovisual content, namely, enciphering software; digital or analog computer software for insertion in digital works of digital watermarking or code sequences or elements of identification or access control, or any signal, all visibly or imperceptibly; software for digital watermarking of works of authorship, broadcast content and audiovisual or audio flows, transmitted by wire, radio, satellite, optical fiber, or computer networks; apparatus and instruments for generation, switching, electronic editing, transmission or routing of television signals, audio and video signals, namely, cameras, camcorders, servers, memory carriers, switching matrix, mixers, multiplexers, demultiplexers, smart digital video signal recorders, distribution line amplifiers, generators, modulators, oscillators, acquisition circuits, signal converters, television and audio video signal receivers and transmitters; postproduction apparatus and instruments, namely, scanners, telecines, solid state recorders, postproduction editing software, converters; video compression and networking apparatus and instruments, namely, encoders, decoders, network adaptors; computer programs for production and editing of television and audio video signals and programs