A method for manipulation-proof storage of payload data, wherein • the payload data is stored in a chain of records, wherein these records are created by a first, delivering device, wherein ∘ the delivering device is a field device that stands in a direct relationship with an industrial production process and is configured as a filling-level measuring device, a level-limit measuring device, a density measuring device, a flow measuring device or a pressure measuring device, and ∘ the payload data comprises measurement values of at least one sensor (54, 57) that is comprised in the field device or connected to the field device; • for every record, a current hash value over at least the payload data comprised in the record is created and stored in the record; • in every record, a predecessor hash value is stored that corresponds to the current hash value of the preceding record, wherein, in the first record of the chain, a predetermined root hash value takes the place of the predecessor hash value; • a chain of the hash values (13', 13, 11) is stored in a persistent memory by a second, safekeeping device in a manner that content, once stored in the persistent memory, can neither be changed nor removed from the persistent memory after the fact and that the content of the persistent memory allows no conclusion as to the payload data itself; and • the records are stored in a reversible memory that is different from the persistent memory. • the payload data is stored in a chain of records, wherein these records are created by a first, delivering device, wherein ∘ the delivering device is a field device that stands in a direct relationship with an industrial production process and is configured as a filling-level measuring device, a level-limit measuring device, a density measuring device, a flow measuring device or a pressure measuring device, and ∘ the payload data comprises measurement values of at least one sensor (54, 57) that is comprised in the field device or connected to the field device; ∘ the delivering device is a field device that stands in a direct relationship with an industrial production process and is configured as a filling-level measuring device, a level-limit measuring device, a density measuring device, a flow measuring device or a pressure measuring device, and ∘ the payload data comprises measurement values of at least one sensor (54, 57) that is comprised in the field device or connected to the field device; • for every record, a current hash value over at least the payload data comprised in the record is created and stored in the record; • in every record, a predecessor hash value is stored that corresponds to the current hash value of the preceding record, wherein, in the first record of the chain, a predetermined root hash value takes the place of the predecessor hash value; • a chain of the hash values (13', 13, 11) is stored in a persistent memory by a second, safekeeping device in a manner that content, once stored in the persistent memory, can neither be changed nor removed from the persistent memory after the fact and that the content of the persistent memory allows no conclusion as to the payload data itself; and • the records are stored in a reversible memory that is different from the persistent memory.