No crypto is safe long term
No encryption is safe long term.
Once upon a time, we had the Geheimschreiber , a un crackable code.
cracked with a lot of effort back then, takes a few seconds now ,
With a back door , it will be cracked, may be not for a decade or so,
but it will be cracked,
and then everything thats has been transmitted in the past is open to be read.
industrial secrets , ha a thing of the past.