Is it technically possible to create and use dynamic private key - public key pair and use it with bitcoin? Is it technically possible to create and use dynamic private key - public key pair and use it with bitcoin?

I am not sure anything conceptually similar to this already exists. Yet, "dynamic" private - public key pair can be defined as ordinary key pair with 2FA capabilities. Both the keys regularly change per generated 2FA token.

Basically I hope the following,


create dynamic private - public key pair, combining 2FA (like, google authenticator) and a passphrase
this key pair can only be used for a short defined duration, or as long as 2FA token is valid
receive funds
chronologically old key pairs can be used to check / receive funds (or, not)
In future, private key generated from passphrase and 2FA token can be used to spend the coins


BIP 38 is not anyway related to this.
No, it is not possible to do what you are suggesting.  Here's more info about cryptography.



You can create create an ECDSA keypair with almost any random data (it must a lower than a certain value, but go check ECDSA specs) and then generate an address... But a keypair will always be valid to receive bitcoins or send them (if you still have the private key).

The thing is that a other party will not be able to know what is your next address since you need the private key to do that.

So yeah you can create keypairs with almost any data, but I don't think it'll be dynamic in the way you think.