The New York Times said that a week ago and if The Times said something, it must be true. Almost by definition, computer networks cannot be, in themselves, secure. The aim of computer networks is to facilitate access to computer-based resources. In order to do so, they transport information from one place to another, generally with a user or two somewhere along the line.
Users are a problem in the security world.
They forget things like passwords. They get frustrated at the imposition of complex security procedures and circumvent these procedures to make their lives easier. They loan their accounts to friends. And many users think they are underpaid, overworked or underappreciated - as a result, these users are potentially corruptible. It sure would be a lot easier, securitywise, without users.