# How would you find the Blinding factor R in RSA blind signature algorithm?

How would you find the Blinding factor $R$ in RSA blind signature algorithm when having – for example – $p=11$, $q=3$, message $m=6$, and public key $pk=7$?

The answer doesn’t have to use the numbers in the example. I’m just trying to understand how to find the blinding factor $R$ having any numbers.

• A common form of RSA blinding is well explained in this answer. – fgrieu Oct 6 '16 at 6:17