Learn about implementing hybrid post-quantum cryptography (PQC) for secure email communications in this technical presentation from the PKI Consortium. Explore a prototype system that combines Certificate Authority, Certificate Management, and Open Source client applications, including Microsoft Outlook integration. Discover the selection criteria for hybrid schemes, focusing on Composite and ICA approaches for PKI and S/MIME migration. Gain practical insights into implementing pure PQC, Composite, and ICA hybrid constructions, covering certificate creation, client enrollment, and secure email signing and encryption using S/MIME. Understand how to effectively integrate classical and post-quantum secure cryptography to ensure long-term confidentiality and non-repudiation in email communications.