Key Management Based on Ownership of Multiple Authenticators in Public Key Authentication. (arXiv:2204.05471v1 [cs.CR])

Public key authentication (PKA) has been deployed in various services to
provide stronger authentication to users. In PKA, a user manages private keys
on her devices called authenticators, and services bind the corresponding
public keys to her account. To protect private keys, a user uses authenticators
which never export private keys outside. On the other hand, a user regularly
uses multiple authenticators like PCs and smartphones. She replaces some of her
authenticators according to their lifecycle, such as purchasing new …

authentication authenticators key key management management ownership public