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Presence Key

Check the person behind the request.

Presence Key is a personal physical device designed to help your systems check that the expected person is participating in one specific action.

Key prototypes · Controlled validation
Front view of the Presence checkpoint, with the Key interface and a Ready indicator.
For example

Before an exceptional payment, a service could ask the registered person to present their Key at an enabled checkpoint. The service would still apply its approval rules.

How it works

  1. 01

    Name the request

    Identify the action and the person who must be present.

  2. 02

    Check person and Key

    The physical check is designed to concern both, for that request.

  3. 03

    Apply your policy

    Your system permits, denies or escalates.

Go a little deeper

Where a check may help

Exceptional payments, account recovery, privileged system changes, sensitive access and certain AI actions. Each use needs its own threat model and evaluation.

What must be validated

Personal binding, resistance to misuse, the physical checkpoint, result handling and the replacement lifecycle. The Key is designed not to require a wireless connection; a complete service still needs integration.

Discuss a person-dependent workflow

Appearance

Choose how 4SI looks on this device.

Color theme

Automatic follows your device’s light and dark settings.

4SI

Open Presence

Presence PersonalYour Keys and access.Presence EnterpriseManage your organisation.

Reserve your Key

Presence Key
Brushed 316L steelPlanned arrival 2027 · Timing may change · Free · Non-binding

All of 4SI

Presence
For institutions
Research
Company & Fellowship
Legal & transparency
For Safety Group Inc.

11201 North Tatum Boulevard
Suite 300 PMB #365
Phoenix, AZ 85028, United States

Contact 4SILegal notice
Presence Key opened