Method for enabling later verification of already transmitted data

摘要

The method for enabling later verification of already transmitted data is based on the application of cryptographic methods for verifying the integrity and the authenticity of already transmitted personal data which have meantime been cleared (deleted). The transmitting entity transmits the data to a further entity, which confirms the unfalsified reception of the data. After the calculation of a cryptographic check sum with the use of a secret key, the transmitted data are cleared in the transmitting entity. In the event of renewed occurrence of the data in the transmitting entity, the cryptographic check sum and the secret key can be used to verify the integrity and authenticity of the data.