How to sync passkeys in Chrome across your PC, Mac, iPhone, or Android
Briefly

Passkeys represent a potential advancement over traditional passwords by offering a more secure and convenient login method. However, significant obstacles remain before passkeys can achieve their promise. The lack of industry standards for storage and management leads to inconsistent methods among different companies. Synchronizing passkeys across various devices is particularly challenging, often requiring users to turn to password managers to maintain functionality across browsers and environments. Google's Password Manager helps sync passkeys across multiple platforms, but users may still encounter occasional syncing issues, highlighting the limitations of current systems.
Passkeys promise to replace passwords as a more secure and convenient login method, but they face significant challenges, mainly in setup and synchronization across devices.
The industry lacks a standard method for saving and storing passkeys, leading each company to develop its own potentially ineffective systems.
Synchronizing passkeys across different devices remains the biggest barrier to widespread adoption of passkeys, leading users to rely on password managers for functionality.
Google's Password Manager allows synchronization of passkeys across platforms, although users may still encounter syncing issues, as was my experience with an Android device.
Read at ZDNET
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