Integrating Post-Quantum Cryptography Within Existing Public Key Infrastructures for Complex Corporate Ecosystems

Recent events in the world of quantum cryptography have demonstrated the need for evolution and alignment with what will soon become an evolutionary standard for all companies involved in the IT world. The hope is that in the coming years, by 2029, defined as the entry point to the Quantum Era, all participating companies will have to adopt Quantum Safe solutions, ensuring the security of communications and data when quantum technologies begin to be widely used. This paper aims to suggest and demonstrate a practical approach, from an enterprise perspective, using technology already developed and available on the market to migrate to post-quantum cryptography. It highlights the key points to focus on: defining an appropriate network architecture, integrating it into a pre-existing global enterprise architecture, and gradually converging towards a fully post-quantum solution.