> What's a password? A secret word or phrase that only you know.
No, a password is a secret word for phrase that both you and the service you want to sign into know.
I don't know how to explain a passkey but at least in this one sense, a passkey is split into a public and private part. The public part is shared, the private part is not. The public part can be verified to match the private part without sharing the private part. Your device stores this private part. When service wants to let you login they ask your device "does this public part match this user's private part?". Your device responds in a way such that the service knows "only someone who has access to the private part could have responded correctly to -should this person be allowed to login'"
No, a password is a secret word for phrase that both you and the service you want to sign into know.
I don't know how to explain a passkey but at least in this one sense, a passkey is split into a public and private part. The public part is shared, the private part is not. The public part can be verified to match the private part without sharing the private part. Your device stores this private part. When service wants to let you login they ask your device "does this public part match this user's private part?". Your device responds in a way such that the service knows "only someone who has access to the private part could have responded correctly to -should this person be allowed to login'"