ISO 15118 ensures secure key exchange in Plug & Charge scenarios through a standardized communication protocol that uses public key infrastructure (PKI) and cryptographic algorithms. The process begins when an EV connects to a charging station, triggering a mutual authentication and key agreement phase. Both devices verify each other’s identity using digital certificates and derive a shared secret key for encrypted communication. This secure channel protects sensitive data like payment information and charging parameters throughout the session.
How Key Exchange Works in Practice
The key exchange in ISO 15118 occurs during the initial connection phase, where the EV and charging station negotiate cryptographic parameters. They use asymmetric encryption to establish a secure channel, with each device generating a pair of keys. The EV sends its public key to the charging station, which then uses it to encrypt session data. The charging station also provides its public key, enabling the EV to authenticate the station’s identity. This mutual exchange ensures both parties can securely communicate without exposing sensitive information.
What This Means for Charging Infrastructure Operators
For operators managing charging networks, ISO 15118’s secure key exchange eliminates the need for manual authentication steps like entering passwords or scanning QR codes. The system automatically handles device verification and encryption setup, reducing operational overhead. It also enhances security by preventing unauthorized access to charging sessions. Operators benefit from a standardized approach that works across different EV models and charging stations, simplifying compliance and maintenance. This seamless integration supports scalable deployments and improves user experience in public charging environments.
Related Reading
For more on related topics, see: Plug & Charge: Simplifying the EV Charging Payment Experience.
Further reading: EV Charge Management Software Global | Europe, UK, US | Tecell CMS
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