There are not 5 key pairs, but only 4!
The so called "master password" is not a key, not even a password, but a seed that, used in combination with the username, allows to recompute all 4 private keys. We should rename it to something different to avoid confusion.
Thanks a lot for the clarification @arcange. Made the changes in my blog.
I think "Master Password" as a term is fine. An average user doesn't care about the terminology as much as its meaning.
Seedphrase is kind of a master password that gives you the ultimate access to your account. Infact "Seedphrase" is a confusing term, especially for newbies.
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It's not! I don't think anyone would want to login into an app with something called a "seed" or "account recovery string".
On the other hand, using the word "password" encourages people to do so, which is wrong.
Damn, now it makes sense to me. Since we should not use the master password ever except for account recovery.
We must do this change, especially for security reasons.
I was only thinking about myself but you are right. Other people might use it just because it's more convenient than using multiple keys.
Glad you got it 🤓