You need to supply some context. Where did you find this text?
Anonymous What does "Serious security and anonymity fails" mean?You're asking us to guess at the meaning of a nearly meaningless word group. So here's my guess:
~ If the government wants complete security, it will spy on everyone to be sure no one is planning any mischief,
and anonymity fails.
~ so no one in that country can expect to act anonymously. No matter how hard you try to hide who you are, the government will always know who you are and what you said and what you did.