Method and computer product for proving time and content of data records in a monitored system

摘要

Method for monitoring and saving data records in a monitored system (100) with the purpose of preventing the possibility to tamper with said data records at a later time. The inventive method comprises the steps of saving data content together with a time-limited active key and encrypting the data content and active key using an encryption algorithm not possible for the encryptor to decrypt, the encrypted data content and active key forming the data record.