Now since Quantum works by learning mechanism that is you give teach it some examples and based on which it can intellectually learn billions of inputs and outputs based on that data.
So one day it could happen that there will some meaning to these seeds based on mathematical calculations. It will need huge computing power may be 100's of teraflops at any given time but it could be possible to know what was done on that seed.
In theory, QC will be able to crack some types of encryption in the future, but this is still theoretical.
Yeah after reading all these answers may be there is harsh reality that we may not be able to decode everything that goes into the SHA.
But,
pointing out to the statement here, there is possibility that the passwords made out of the "text" input can be broken down to original hints. I mean, a text when you put into SHA generator then you will have same input again and again. QC might just able to figure out that constant repetitive inputs giving out similar SHA's.
Its again broader stuff, I am still not able to convey my thoughts properly here. Will look into it again.
Meanwhile I will continue to post beginners guide for Blockchain into parent thread.
Thanks for the help guys.
Will lock the thread now.