Digital contents copying inhibition apparatus, digital contents copying inhibition method, and computer products

   
   

The digital contents copying-inhibition apparatus comprises a guard data storage section which stores a guard data. This guard data is for appending to audio or video digital data which can be expressed as amplitude of the contained frequency component. Presence of this guard data becomes apparent only when the audio or video digital data is reproduced after the data has been compressed once. The apparatus further comprises, a peak detection section which identifies a position of a digital value having a prespecified increase rate and a prespecified amplitude among a plurality of digital values each constituting the digital data, a data analysis section which sets a flag for a digital value located at a position away from the peak position by a prespecified number and also sets a plurality of digital values within a prespecified range centering on the digital value for which the flag has been set as a data pattern, and a guard data appending section which identifies a position where the data pattern is located from the digital data and varies the digital data by appending the guard data to the identified position.

_ digital contenido copiar-inhibicio'n aparato abarcar uno guardar dato almacenaje sección que almacenar uno guardar dato. _ este guardar dato ser para appending audio o vídeo digital dato que poder ser expresar como amplitud contained frecuencia componente. _ presencia este guardar dato convertir evidente solamente cuando audio o vídeo digital dato ser reproducir después dato tener ser comprimir una vez que. _ aparato más lejos abarcar, uno pico detección sección que identificar uno posición uno digital valor tener uno especificar primero aumentar tarifa y uno especificar primero amplitud entre uno pluralidad digital valor cada constituting digital dato, uno dato análisis sección que fijar uno bandera para uno digital valor localizar en uno posición lejos pico posición por uno especificar primero número y también fijar uno pluralidad digital valor dentro uno especificar primero gama centering en digital valor para que bandera tener ser fijar como uno dato patrón, y uno guardar dato appending sección que identificar uno posición donde dato patrón ser localizar digital dato y variar digital dato por appending _ guardar dato identificar posición. _

 
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> Method for the execution of an encryption program for the encryption of data in a microprocessor-based portable data carrier

> Encrypting a digital object based on a key ID selected therefor

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