1 Introduction

This document describes the blocks in the WLC system architecture required for the Qi authentication process

using OPTIGA™ Trust Charge. The Qi 1.3.x specification mandates authentication for Extended Power Profile

(EPP) Power Delivery (PD) of more than 5 W.

Qi authentication is a tamper-resistant method to establish and verify the identity of the power transmitter; it

enables the power receiver to trust the power transmitter to operate within the bounds of the Qi specification.

OPTIGA™ Trust Charge enables the WLC power transmitter’s authentication functionality and thereby ensures

that the WLC transmitter system remains compliant with the Qi specification.

OPTIGA™ Trust Charge’s main features are:

• Common Criteria EAL 6+ certified secure storage subsystem

• Supports X.509 v3 with DER encoding for the certificate format

• Authentication based on ECDSA

• Cryptography support: NIST P-256, SHA2

• OPTIGA™ Trust Charge meets the security and authentication requirements mandated by the WPC

specification

• OPTIGA™ Trust Charge comes with manufacturer certificate service provider (MCSP) services for creating

and provisioning the WPC-signed certificate chain issued to the product manufacturer organization

− This process creates a new OPTIGA™ Trust Charge sales part number for the customer organization