OCPP 2.0.1 implements secure key exchange and certificate management using PKI through the use of TLS 1.3 with mutual authentication, where each charger and central system maintains a unique certificate issued by a trusted Certificate Authority (CA). The protocol supports automatic certificate renewal and secure communication channels, ensuring that only authorized entities can interact with charging infrastructure in multi-tenant Charge Point Operator (CPO) environments.
How Certificate Management Works in OCPP 2.0.1
In OCPP 2.0.1, certificate management is handled via the GetCertificateStatus and UpdateFirmware messages, which allow for secure exchange of certificates between the charger and central system. Each device maintains a certificate chain that includes a root CA, intermediate CA, and the device’s own certificate. This setup enables mutual TLS authentication, where both ends verify each other’s identity before communication begins.
The protocol also supports certificate revocation lists (CRLs) and online certificate status protocol (OCSP) checks to ensure that compromised or expired certificates are not used. For multi-tenant deployments, this system allows CPOs to manage separate certificate hierarchies per site or fleet, maintaining clear separation of trust domains.
Practical Implications for Charge Point Operators
For CPOs managing multiple charging sites, OCPP 2.0.1’s PKI-based certificate handling simplifies compliance with security standards and reduces the risk of unauthorized access. It allows operators to enforce strict access controls and audit trails, especially when integrating with third-party platforms or roaming networks.
Operators can also automate certificate lifecycle management through tools that integrate with OCPP 2.0.1, reducing manual overhead and ensuring consistent security posture across all chargers. This is particularly valuable in large-scale deployments where centralized control and visibility are essential.
Related Reading
For more on related topics, see: OCPP vs OCPI: A Practical Comparison for CPOs.
Further reading: CMS-Based Energy Management for EV Charging: OCPP Smart Charging in India | Tecell CMS Blog
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