# PI – Portability and Interoperability

- Web page: https://c5.patrickscheid.de/en/pi/

- [PI-01 Safety of Input and Output Interfaces](https://c5.patrickscheid.de/en/pi-01/index.html.md): 5 sub-criteria (2 basic, 3 additional), with customer criteria, changed since C5:2020
- [PI-02 Contractual Agreements for the Provision of Data](https://c5.patrickscheid.de/en/pi-02/index.html.md): 3 sub-criteria (1 basic, 2 additional), with customer criteria, changed since C5:2020
- [PI-03 Secure Deletion of Data](https://c5.patrickscheid.de/en/pi-03/index.html.md): 3 sub-criteria (3 basic), with customer criteria, changed since C5:2020

---

Source: BSI C5:2026, machine-readable edition v1.0.1, © Federal Office for Information Security (BSI) 2026, reproduced unchanged under CC BY-ND 4.0 (https://creativecommons.org/licenses/by-nd/4.0/). Change notes: BSI C5:2026 Changelog, © BSI 2026, CC BY-ND 4.0. Unofficial presentation, not affiliated with BSI.