A method as well as a crypto-arrangement and a computer program product for monitoring an integrity of a test dataset, wherein a random sample of a test dataset is checked for integrity is provided. The method for monitoring an integrity of a test dataset includes the following steps: random sample-type selection of the test dataset from a dataset to be transferred via a communications connection; cryptographically protected provision of the selected test dataset to a test unit, wherein a communication via the communications connection is carried out uninfluenced by the selection and preparation; testing of the cryptographically protected test dataset for integrity by the test unit, based on cryptographic calculations and plausibility information.