Cryptographically secure random implementation, with fallback on normal random.

Class SecureRandomNotAvailable Exception raised when no secure random algorithm is found.
Class SourceNotAvailable Internal exception used when a specific random source is not available.
Class RandomFactory Factory providing secureRandom and insecureRandom methods.
Function _fromhex Undocumented
def _fromhex(hexBytes): (source)
API Documentation for Twisted, generated by pydoctor at 2016-09-15 00:53:01.