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 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 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 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 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 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 . <EOS>