EPO Intent to Grant Received — Patent Available for Acquisition

European Patent Asset
Continuous Revocable Biometric Authentication

A patented authentication architecture enabling credential-independent, continuous biometric verification via wearable-acquired PPG signals — available for strategic acquisition by wearable OEMs, identity platforms, and enterprise security vendors.

European Patent Office — Intent to Grant received (2026). Technical validation prototype available. Supporting documentation and prosecution history provided upon NDA.
Review the IP Request IP Package
EPO Intent to Grant
Oct 2021 Priority Date
PCT International Filing
Scroll
Authentication Gap

Structural Vulnerability in
Modern Authentication

Modern authentication systems remain event-based and credential-dependent. The structural vulnerability has not been resolved — it has been patched incrementally.

Dominant
Credential-based authentication (passwords, PINs, tokens) remains the prevailing model

Despite decades of known limitations, the authentication industry has not moved beyond event-based, credential-dependent mechanisms at scale.

~80%
of security breaches involve weak or stolen credentials
Irrevocable
Static biometric templates cannot be revoked if compromised
Undeployed
Continuous, revocable biometric authentication is not widely deployed

The capability has been theorised. The patented architecture makes it structurally viable at scale.

Architectural Classification of Existing Approaches

Traditional Biometrics

Static template storage. Event-based authentication. Dedicated hardware requirements. Non-revocable.

Behavioural Biometrics

Context-dependent acquisition. Variable reliability. Not suitable for wearable-native deployment.

Credential-Based (PIN / Token)

Event-based. User-interaction dependent. Susceptible to theft, sharing, and shoulder-surfing.

Patented Continuous Architecture

Persistent authentication state. Revocable biometric templates. Wearable-native signal utilisation. PKI-integrated.

Intellectual Property

Intellectual Property Status

European patent allowed following substantive examination by the EPO. Intent to Grant issued 2026. Priority Date: 28 October 2021. Supporting technical documentation and prosecution history available upon request.

EPO Intent to Grant

International Patent Application

EPO Status
Intent to Grant received (2026)
Priority Date
28 October 2021
Application Type
PCT (Patent Cooperation Treaty)
Documentation
Prosecution history available upon NDA

Patented Architecture Covers

  • 1
    Credential-independent authentication via wearable biometric signals

    Method and system for authenticating users through photoplethysmographic signal analysis on wearable devices, without credential interaction

  • 2
    Non-time-persistent biometric template construction

    System for generating and managing biometric templates that naturally expire, enabling revocable biometrics — mitigating irrevocable compromise risk

  • 3
    Public-key cryptography integrated with biometric signal processing

    Architecture integrating PKI with wearable-acquired PPG signals for continuous, passive authentication state maintenance

  • 4
    Multi-credential replacement via wearable-native architecture

    System for replacing passwords, PINs, and smart cards via Bluetooth and NFC — leveraging existing wearable sensor infrastructure without additional hardware

What the Acquisition Delivers

Priority Position

Exclusive ownership of a PCT patent with EPO Intent to Grant and a 28 October 2021 priority date — pre-dating subsequent industry exploration in the continuous wearable authentication space, including by major technology companies.

Technical Validation Prototype

A working hardware prototype demonstrating feasibility of the patented architecture. Developed solely for validation purposes — the primary asset is the patented architecture itself.

R&D Documentation

PPG signal datasets, algorithm documentation, and prosecution history — institutional knowledge representing years of domain-specific research and development.

Clean Title Transfer

Full assignment of all IP rights, prior art records, and cryptographic timestamps. No licensing encumbrances. Valuation and deal structure available upon NDA.

Patented Architecture

Patented Authentication Architecture

The patented architecture enables credential-independent authentication using wearable-acquired biometric signals, integrated with public-key cryptography and non-time-persistent template construction. This represents a structural transition from static unlock mechanisms to persistent authentication state.

Architectural Flow

01

Signal Acquisition

Device wearment initiates passive biometric signal acquisition. No user interaction, no credential entry — the PPG sensor embedded in existing wearable hardware captures the blood-flow signal continually.

→
02

Biometric Signal Processing

The photoplethysmographic signal is processed against a locally stored, non-time-persistent biometric template. No additional sensor hardware required beyond existing wearable infrastructure.

→
03

Cryptographic Verification

Signal match triggers cryptographic authentication via public-key infrastructure. Authentication state is propagated to paired devices via Bluetooth or NFC — passively and continuously.

→
04

Persistent Authentication State

Continuous authentication state is maintained for the duration of wear. Access to phones, computers, payment terminals, and digital services is managed passively — without discrete authentication events.

Technical Validation Recording

Prototype demonstration of the patented authentication architecture. Implementation conducted solely to validate architectural feasibility.

Capability 1

Credential Replacement Architecture

The patented architecture replaces static unlock mechanisms — PIN, pattern, token, and password — through integration with public-key infrastructure. Authentication is credential-independent and user-interaction-free.

  • Replacement of static unlock methods via PKI integration
  • Passive, user-independent authentication flow
  • Applicable across smartwatches, fitness bands, smart rings, earbuds
Capability 2

Non-time-persistent Biometric Templates

Unlike static biometric modalities, the patented architecture constructs biometric templates that naturally expire. This resolves the irrevocability problem inherent in fingerprint and facial recognition systems.

  • Controlled temporal variability enables revocable template construction
  • Templates expire autonomously — breach-resilient by design
  • New template generated on each re-enrolment cycle
Capability 3

Continuous Biometric Verification

The architecture maintains a real-time authentication state throughout the wear session — eliminating discrete authentication events and providing persistent two-factor assurance without user-initiated interaction.

  • Factor 1: PPG biometric signal (something you are)
  • Factor 2: Physical wearable device possession (something you have)
  • Real-time authentication state maintenance — no interaction required

Signal-Level Foundations

The patented model leverages three measurable properties of photoplethysmographic signals — forming the technical basis for non-time-persistent biometric template generation as defined in the patent claims.

Subject A Subject B

Inter-subject Distinctiveness

PPG morphology is individual-specific. Enables identity differentiation — the basis for biometric verification without shared credentials.

T = now T = +10 min

Temporal Stability Within Session

Signal remains consistent within a wear session. Enables continuous authentication state maintenance — the basis for passive, persistent verification.

T = now T = +3 days

Controlled Temporal Variability

Signal diverges across sessions, enabling non-time-persistent template construction. Templates expire by design — resolving the irrevocability risk inherent in static biometric modalities.

Strategic Timing and Industry Convergence

The idamond priority date of 28 October 2021 pre-dates observable industry movement toward continuous wearable-based authentication. Post-priority publications from major OEMs indicate the industry is converging on the architectural space defined by the patent.

Priority Position: October 2021

PCT application filed establishing international priority. Substantive EPO examination completed — Intent to Grant issued 2026.

Industry Signal: Apple "Fusion-id"

Apple published research on continuous wearable-based biometric authentication subsequent to idamond's priority date. Preliminary technical review indicates conceptual alignment with the patented authentication architecture — establishing early positioning relative to subsequent industry exploration.

Architectural Differentiation

Modality Continuous Auth Revocable Templates No Added Hardware PKI-Integrated Wearable-Native
Patented Architecture (PPG) ✓ ✓ ✓ ✓ ✓
Fingerprint ✗ ✗ ✗ ✗ ~
Face Recognition ~ ✗ ✗ ✗ ✗
Wrist Vein ~ ✗ ✗ ✗ ~
Behavioural Biometrics ~ ~ ✓ ✗ ✗
PIN / Token ✗ ✓ ✓ ~ ✓
Inventorship

Inventorship and Technical Background

Piergiacomo De Marchi

Piergiacomo De Marchi

Primary Inventor & Architect LinkedIn

Primary inventor and architect of the patented authentication model and AI algorithms. Serial founder and AI engineer with 12+ years of research background in biometrics and authentication, machine learning, algorithms, hardware prototyping, and large-scale software systems.

  • Primary inventor, idamond continuous biometric authentication architecture
  • 12+ years software development experience
  • 3x VC-backed founder; Entrepreneur First, Berkeley SkyDeck, South Park Commons, Village Global
  • TensorFlow contributor
  • Double MSc Cybersecurity Engineering (summa cum laude)
  • Affiliated: ETH Zurich, Credit Suisse
  • International experience: Italy, Denmark, Switzerland, US & global
Affiliations
Dario Salice

Dario Salice

Business Development LinkedIn

Seasoned expert in Telecommunications, Security, and Online Identity. Former Product Manager at Google and Meta, where he built and scaled security tools protecting billions of users. As Meta's representative on the FIDO Alliance Board, he helped shape global standards for strong, passwordless authentication.

  • Former Product Manager, Google & Meta (Facebook)
  • Former Board Member, FIDO Alliance
  • Regular contributor to FIDO Alliance working groups
  • Co-author, Biometrics and Authentication (Apress, 2024)
  • Independent security & identity consulting practice
  • International experience: Switzerland, US, UK & global
Affiliations
Acquisition Enquiry

Enquire About IP Acquisition

We are offering the idamond European patent asset for strategic acquisition. Suitable acquirers include wearable OEMs, identity and access management platforms, enterprise security vendors, and technology companies seeking a defensible position in continuous biometric authentication.

✓ European patent — EPO Intent to Grant issued (2026)
✓ Priority Date: 28 October 2021 — pre-dating subsequent industry filings
✓ Technical validation prototype and full R&D documentation included
✓ Valuation and deal structure available upon NDA

Acquisition Process

  1. 1
    Initial Enquiry

    Submit the form — we respond within 48 hours.

  2. 2
    NDA & IP Package

    Mutual NDA signed; full IP package shared including patent claims, prosecution history, prototype, and R&D documentation.

  3. 3
    Valuation Discussion

    Deal structure and valuation presented. Questions answered directly by the inventor.

  4. 4
    Assignment & Close

    Full IP assignment — clean title transfer with no licensing encumbrances.

All enquiries handled in strict confidence.

Or reach us directly: