Hi @gayeongs.91919 (Customer)​ , Thank you for reaching out to the Okta Community! 

I would like to preface my response by saying that Okta does indeed not recommend sharing devices for this use case due to the high inherent security risks. 

That being said, you could perhaps look into Hardware key options like Yubikey (FIDO2 / WebAuthn) to register multiple users per device. 

How it works: User A logs into Okta and registers the key. User B then logs into their own Okta account and registers the exact same physical key. The key generates and stores separate, isolated cryptographic credentials for each user.

The Catch: While technically possible, this is heavily discouraged for two reasons:

• Logistical Friction: Users must physically pass the key to one another whenever someone needs to authenticate, which disrupts workflows.
• Security Risk: If the physical key is lost, damaged, or stolen, all users sharing that key are locked out of their accounts simultaneously. (same would apply for a smartphone)

We'll leave this question open in case anyone else in the Community can provide real-world insights.  

Regards.

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