| abstract |
The present invention relates to a method for proving retrievability, 'POR', of information, said method being performed in a memory available to one or more computation devices, wherein credentials between a user device, a storing device and an auditing device between each pair of said devices are exchanged and used for communication between them, comprising the steps of a) Encoding the information to be stored on said storing device by said user device or said auditing device, b) Storing the encoded information on said storing device, c) Verifying the correctness of said stored information by the auditing device and using unpredictable random information d) Transmitting correctness information to the user device, said correctness information being secure and which are generated based on the result of said verification by the auditing device and e) Validating said correctness information by the user device for proving retrievability of said stored information and said unpredictable random information. |