Geneva, Switzerland, April 28, 2026 -- SEALSQ Corp ("SEALSQ" or "Company"), a company that focuses on developing and selling Semiconductors, PKI, and Post-Quantum technology hardware and software products, today announced the filing of a new patent application for an innovative protection technique against side-channel attacks on polynomial cryptographic algorithms. This development further strengthens the Company’s robust intellectual property portfolio at the exact moment Google has set a firm 2029 deadline for full post-quantum cryptography migration across its ecosystem.

Google’s announcement directly impacts critical systems including Android 17 secure boot, Chromecast device authentication and TLS, Widevine license requests (currently based on RSA-2048), and cloud bootstrap processes.

New Patent Filing

The patent introduces a novel solution at the message encoding stage of polynomial-based PQC algorithms (such as NIST-standardized ML-KEM/Kyber). It hardens hardware implementations against side-channel attacks that exploit power consumption, electromagnetic emissions, or timing variations, a critical vulnerability even for mathematically robust post-quantum algorithms.

Key Clarification on Research Strategy

The invention covered by this patent application represents a separate and complementary line of research, developed in parallel with the QS7001 program. It illustrates SEALSQ’s broader commitment to continuously advancing the state of the art in PQC hardware security — both for current products and for future generations of secure components.

QS7001 Quantum Shield Advances to Sampling Phase

This latest patent filing coincides with the sampling phase of SEALSQ’s QS7001 Quantum Shield secure element — the Company’s first native post-quantum secure microcontroller. The QS7001 already embeds NIST-approved PQC algorithms (ML-KEM/Kyber and ML-DSA/Dilithium) directly in silicon, delivering a tamper-resistant hardware root of trust for secure boot, device authentication, TLS handshakes, and certificate management.

Jean-Pierre Enguent, Chief Technology Officer of SEALSQ, stated: “Google’s 2029 deadline is a strong wake-up call for the entire industry: software-only solutions will not suffice for long-term security. At the same time, even the best mathematical algorithms remain vulnerable if their physical implementation is not properly protected. This new patent addresses one of the most subtle and underappreciated challenges in post-quantum cryptography, protecting polynomial algorithms like Kyber against side-channel attacks at the message encoding stage. Developed in parallel with the QS7001, this invention demonstrates our dual focus on delivering strong products today while continuously building the intellectual property foundation for future generations of even more secure hardware.”

SEALSQ’s complete quantum-resistant ecosystem, which combines PQC-secure semiconductors, the INeS PKI platform, and cryptographic agility services, aims to enable OEMs to achieve smooth, low-disruption, and certifiable migration (Common Criteria EAL5+ and beyond) ahead of the 2029 deadline.

With 126 active patents and more than 1.75 billion secure semiconductors deployed worldwide, SEALSQ believes it is well positioned to support device manufacturers and the Android/IoT ecosystem in meeting both the immediate market demand and the highest standards of physical and quantum security.