PyCA cryptography 2.4.1 has been released to PyPI. cryptography includes both high level recipes and low level interfaces to common cryptographic algorithms such as symmetric ciphers, asymmetric algorithms, message digests, X509, key derivation functions, and much more. We support Python 2.7, Python 3.4+, and PyPy. Changelog (https://cryptography.io/en/latest/changelog/#v2-4-1): * Fixed a build breakage in our manylinux1 wheels. Changelog (https://cryptography.io/en/latest/changelog/#v2-4): * BACKWARDS INCOMPATIBLE: Dropped support for LibreSSL 2.4.x. * Deprecated OpenSSL 1.0.1 support. OpenSSL 1.0.1 is no longer supported by the OpenSSL project. At this time there is no time table for dropping support, however we strongly encourage all users to upgrade or install cryptography from a wheel. * Added initial OCSP support. * Added support for PrecertPoison. -Paul Kehrer (reaperhulk)