New device access laws proposed by the government increase national security risk by increasing the attack surface for hacking on all devices.
The implementation of this law will create one of the world's largest reservoir of high-value security holes for hackers to take advantage of in terms of obtaining access to personal devices. It will be hard to control access to exploits and the networks of the AFP, ASIO and other policing bodies when so much valuable information can be obtained by hijacking a single law enforcement agency.
Security through distributed control is an important part of modern security practices. Placing potential access to all important information in a single location creates an attractive target for international spies and corporate espionage agents.
To suggest that ASIO, AFP and other policing bodies are impenetrable to foreign spies defies history. For example, the blueprints of the new ASIO building were leaked (possibly to or by the Chinese government) before ASIO had a chance to move in. The result of this disclosure of information lead to the agency failing to move into the building, as it was considered a security risk.
With the introduction of this legislation, mobile phones that are in Australia will be considered to be a security risk by individuals with a high requirement for security. Due to the risk of privacy loss, these laws could also render Australia unattractive for non-essential travel.