>> to have unbreakable encryption
I can think of only one method that more than doubles the vulnerability of securing an asymmetric private key.
Gene eric...
I don’t quite understand what you mean,
perhaps you could add a little more to
what you wrote.
.............unbreakable...
a 512 bit block cipher
(old fashion secret-key, held by both parties)
would be computationally infeasible
to break.