Pycrypto is not [actively maintained](https://blog.sqreen.io/stop-using-pycrypto-use-pycryptodome/). It has no new commits since 2014. [Pycryptodome](https://github.com/Legrandin/pycryptodome) is a compatible, actively maintained fork of pycrypto.