SEALSQ launches PQC stack for quantum systems
SEALSQ has announced a security platform aimed at protecting emerging quantum computing infrastructures, positioning its technology as a foundation for secure quantum system development. The company says its Quantum-Resilient Vertical Security Stack integrates hardware, cryptography and identity management to secure systems used to build and operate quantum computers.
For engineers and technology leaders, the announcement highlights a growing design challenge: protecting quantum hardware and its supporting infrastructure from new cybersecurity threats as quantum systems move from research labs toward commercial deployment.
Security becomes critical as quantum systems scale
As quantum computing development accelerates worldwide, the systems that control and orchestrate quantum processors are becoming potential attack surfaces. Quantum processors rely heavily on classical electronics — such as cryogenic controllers, orchestration platforms and cloud interfaces — creating complex infrastructure that requires protection from both current and future cyber threats.
SEALSQ says it addresses this problem by embedding security mechanisms directly at the semiconductor level. Its approach combines hardware Root-of-Trust technology, public key infrastructure (PKI) and post-quantum cryptography (PQC) into a vertically integrated security architecture.
Rather than adding security later in the design process, the company argues that embedding security directly into silicon enables quantum system developers to create “secure-by-design” architectures. This approach can reduce the risks associated with retrofitting cryptographic protections into existing hardware and firmware.
Four-layer security stack for quantum infrastructure
The company structures its platform as four integrated service modules that protect the entire quantum computing stack.
The first module focuses on hardware Root-of-Trust technology. SEALSQ secure elements and TPM solutions provide device identity and authentication for components such as quantum processors, cryogenic controllers and system peripherals. Features include secure boot, firmware validation, system integrity monitoring and authenticated orchestration of quantum workloads.
A second layer integrates post-quantum cryptography based on standards released by NIST in 2024. The platform supports algorithms such as CRYSTALS-Kyber for secure key exchange and CRYSTALS-Dilithium for digital signatures, along with hybrid classical-quantum cryptographic protocols to secure communications between quantum and classical computing systems.
The third component focuses on secure semiconductor architectures for the classical electronics that control quantum processors. These designs can include secure ASICs for cryogenic electronics, hardware-level Root-of-Trust integration and protected high-speed data acquisition systems.
Finally, the company targets cloud-based quantum computing services. The stack includes identity management, encrypted communications and secure execution environments for quantum computing-as-a-service (QCaaS) platforms.
“Quantum computers will redefine the limits of computing, but they will also redefine cybersecurity risks,” said Carlos Creus Moreira, CEO of SEALSQ. “Organizations developing quantum technologies must ensure their infrastructures are built on trusted security foundations. SEALSQ is ready to provide a complete vertical stack, from silicon Root of Trust to QBit-level protection, designed to secure the entire quantum computing ecosystem.”
SEALSQ says its security technologies are already deployed in more than 1.7 billion devices worldwide across sectors including IoT, healthcare, government networks and critical infrastructure. By extending its semiconductor-based cryptographic technologies into the quantum computing sector, the company aims to position itself as a cybersecurity partner for organizations building next-generation computing platforms.
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