[dmdsoftware]

Which device is this? Seems encrypt.encryptString returns None because the modules fail to load. I thought crypto is fairly standard, especially in linux. On all my Debian Jessie installs, I never had to install the crypto module -- even on my VPSes, I don't even have PIP installed to do so.

A dedicated server running Ubuntu 16.10.

Went straight to the test file and this is the error message that returned:

Traceback (most recent call last):
File "delme.py", line 1, in <module>
import Crypto.Random
ImportError: No module named Crypto.Random


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Which python crypto library do you recommend?

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Created the test file on a LibreELEC device. Ran without hiccup.

On the ubuntu, can you try:

apt-get install python-crypto

I'd like to know if that does the trick.

LibreELEC is debian at it's core. There must be a standard debian package that makes use of PyCrypto, for it to be already installed on all the Debian devices I've encountered.