Definition
A TSE (Technical Security Device) is a certified hardware or cloud module that makes all cash register transactions tamper-proof.
Background & relevance for restaurant operators
Since January 2020, every electronic POS system in Germany must be equipped with a TSE. It signs each transaction with a digital signature and stores it in a protected memory. The TSE can be a hardware module (USB/SD card) or a cloud TSE. Regular export of TSE data is required for tax audits.