For several decades, cybersecurity has relied on solid foundations: classical cryptographic algorithms (RSA, ECDSA, ECC) that protect our communications, identities, and data. But a technological revolution is underway: the quantum computer. This new computing power will be able to break these protections in seconds, putting all current authentication systems at risk.

This threat is often described as a real “quantum apocalypse”: attackers can already intercept encrypted data to decrypt it later, thanks to the power of quantum computers. This attack, known as "store now, decrypt later," could compromise all current digital communications and identities.

Faced with this apocalypse, organizations must anticipate. It is in this context that Vaultys has developed VaultysID, the first post-quantum, decentralized, and open source authentication solution, designed to provide lasting and sovereign security.

The quantum threat: a strategic challenge for cybersecurity

Quantum computers are no longer a distant hypothesis: their development is backed by major world powers and their applications promise to be disruptive.

The problem? The current algorithms securing the Internet—RSA, ECDSA, elliptic curves—are vulnerable to Shor’s algorithm, which can factorize or break asymmetric keys. In short: the authentication mechanisms used today could become obsolete overnight.

Cybersecurity agencies (NIST, ANSSI) are already recommending a gradual migration to post-quantum cryptography, with a transition period planned between 2025 and 2035. Failing to prepare means risking the compromise of your digital identities.

The NIST announced that classical cryptography will be considered obsolete by 2030.
ANSSI recommends a hybrid approach starting now, to ensure a gradual and secure transition.

The limits of centralized systems

Beyond the quantum challenge, another issue weighs on our identity infrastructures: their centralization.

Today, the majority of IAM (Identity and Access Management) systems rely on platforms controlled by a few major players, often American. This centralization leads to:

single points of failure (one compromised server = millions of identities exposed),
a foreign legal dependency (e.g. Cloud Act),
risks of surveillance or censorship,
a loss of sovereignty for European states and companies.

👉 Tomorrow’s cybersecurity cannot be built on yesterday’s vulnerabilities.

Post-quantum decentralized identity: a credible alternative

The solution requires a paradigm shift: moving away from the centralized model to adopt a decentralized identity, resilient and compatible with the post-quantum era.

Decentralized Identifiers (DID): each user controls their identity without relying on a central authority.
Verifiable Credentials (VC): proofs are shared peer-to-peer, without a single server.
Open source: transparency, auditability, and independence from proprietary “black boxes.”
Post-quantum compatibility: resistant to attacks from quantum computers.

This model not only protects companies against cyberattacks: it also ensures their strategic independence and regulatory compliance (GDPR, eIDAS 2.0).

VaultysID: a world first in cybersecurity

VaultysID brings this vision to life through a unique innovation.

Post-quantum cryptography: integration of NIST-standardized algorithms, such as CRYSTALS-Dilithium, to ensure long-term security.
Hybrid signature (Capgemini + Vaultys): combination of a classical signature (Ed25519) and post-quantum (Dilithium), enabling a gradual and secure transition.
Audited peer-to-peer protocol: a verifiable credential exchange protocol, audited by Amossys, ensuring the absence of any central point of failure.
Interoperability and sovereignty : aligned with W3C standards (DID & VC), GDPR, and the French National Quantum Strategy.

VaultysID integrates easily with existing infrastructures thanks to its compatibility with standards W3C DID, VC, FIDO2, WebAuthn and WebRTC.

In addition, Vaultys collaborates with leading partners such as Capgemini and Scafe to support companies in their post-quantum transition.

👉 VaultysID is the first sovereign, open source, and auditable solution designed to withstand the post-quantum era.

Concrete use cases for tomorrow

VaultysID is more than just a technological achievement: it’s an infrastructure ready to meet real-world needs.

Businesses: passwordless access, enhanced IAM management.
Governments & institutions: sovereign citizen identity, alternative to centralized American models.
Education & certification : verifiable and portable digital diplomas.
IoT & connected devices: secure and future-proof authentication.
Transactions & payments : distributed signatures resistant to quantum threats.

Each use case illustrates the same promise: giving back control of identity to its rightful owners.

Vaultys is more than just a technological solution: a dedicated team supports companies and institutions in their migration, through audits, training, and technical assistance.

Conclusion: sovereignty, security, transparency

The post-quantum era is not a distant prospect, it is a reality to anticipate today.

VaultysID stands out as the world's first post-quantum authentication solution based on a decentralized open-source identity.

Sovereign
Transparent
Compatible and interoperable
Resistant to tomorrow's threats

As highlighted by François-Xavier Thoorens, CEO of Vaultys :

Classical cryptography is living its final years. Our mission is to democratize access to robust and sovereign post-quantum tools, so that everyone can protect themselves today against the threats of tomorrow.