Python 3.6 reached the [end-of-life and is no longer supported by Python](https://www.python.org/downloads/release/python-3615/) since around a year ago.

You hopefully updated to a supported version of Python a while ago. If you haven't, you really should.

### Features

it's not adaptive, an // attacker only learns the magnitude of p - q. if diff.BitLenVarTime() <= N.BitLen()/2-100 { return errors.New("crypto/rsa: |p - q| too small") } // Check that d > 2^(nlen/2). // // See section 3 of https://crypto.stanford.edu/~dabo/papers/RSA-survey.pdf // for more details about attacks on small d values. // // Likewise, the leakage of the magnitude of d is not adaptive. if priv.d.BitLenVarTime() <= N.BitLen()/2 { return errors.New("crypto/rsa: d too small") } // If the key is...