Data centre
A data centre is a specially secured building in which servers are operated with redundant power supply, cooling, network connectivity and access control.
Professional data centres secure operations several times over: emergency power, multiple internet connections, fire protection, air conditioning and strict access controls. This keeps websites and software reachable even during disruptions.
Certifications make quality verifiable. ISO 27001 is an internationally recognised standard for information security management systems; the C5 criteria catalogue of the German Federal Office for Information Security (BSI) describes requirements for secure cloud services.
Circle operates websites and software in German data centres certified to ISO 27001 and BSI C5.
What to look out for
- Ask about the data centre location — Germany or the EU simplifies data protection.
- Check certifications such as ISO 27001 or BSI C5.
- Clarify where backups are stored — ideally at a second location.
- Ask about power and network redundancy.
- Know contacts and response times for incidents.
Common mistakes
- Servers in the office without emergency power, cooling and access protection.
- Backups in the same data centre as the live data.
- Unclear in which country the data actually resides.
Frequently asked questions
An internationally recognised standard for information security management systems. A certified data centre demonstrates that it systematically identifies, treats and regularly reviews risks.
A criteria catalogue of the German Federal Office for Information Security describing minimum requirements for secure cloud services, confirmed by auditors.