A digital calibration certificate (DCC) serves for the electronic storage, the authenticated, encrypted and signed transmission and the uniform interpretation of calibration results. Under the leadership of the Physikalisch-Technische Bundesanstalt (PTB), a concept is being developed that will allow these data to be handled in the future. The target group are all facilities worldwide, which need proof of the metrological traceability of their measurement results. These include metrology institutes and designated institutes, national calibration offices, calibration laboratories and many facilities in industry that require proof of their quality management systems. The analogue calibration certificate has so far rarely generated a surplus value for a company since the data obtained during the calibration are time-consuming and error-prone. The DCC compensates for this crucial disadvantage of its analogue counterpart. Thanks to its machine readability, digitally supported production and quality monitoring processes are greatly supported. This creates a crucial added value for a company that uses the DCC. In addition to the structure of the DCC, special framework conditions must be laid down for its transfer. These include cryptographic protection procedures. They ensure the electronic transmission of the contents as well as the integrity and authenticity of the contents of the DCC. The core competency for appropriate procedures is not in the field of metrology institutes. For this purpose, previous results and external expertise will be used. However, the framework conditions are defined by the metrology institutes, taking legal requirements into consideration. The aim is to create an internationally recognized DCC format. This is to be established as an exchange format in the entire field of metrology. Based on the DCC, exchange formats should be developed in legal metrology, for digital type examination certificates and for the "digital twin" (DT), see Chapter 5.
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