Unlike regular computers, which process information one piece at a time (using bits that are either 0 or 1), quantum computers rely on the principles of quantum physics. This allows them to represent many combinations of information simultaneously. Because of this unique capability, a quantum computer can solve complex mathematical problems exponentially faster than the most powerful supercomputers we have today. While this offers incredible potential for science, it also threatens the mathematical puzzles that currently protect our digital data.
Australia is a global leader in quantum technology research, with several government and university-backed organizations dedicated to this field.
The Domain Name System (DNS) acts as the 'phone book' of the internet. When you type a human-readable website name (like google.com) into your browser, the DNS translates it into a string of numbers known as an IP address so your computer can find the server. To prevent hackers from lying about these addresses, we use 'digital signatures' to prove the identity of the sender. These signatures act like a wax seal on a letter, guaranteeing that the information comes from a legitimate source and hasn't been tampered with.
Organizations in Australia are responsible for managing internet names and ensuring the cybersecurity of the nation's digital infrastructure.
The immense power of quantum computers means they could theoretically break the math behind our current digital signatures. If a bad actor used a quantum computer, they could forge signatures and redirect internet traffic to fake websites to steal information. To prevent this, researchers are developing 'post-quantum cryptography.' These are new security designs and algorithms that are resistant to attacks from both regular computers today and powerful quantum computers of the future, ensuring trust is maintained globally.
Australian universities and defence organizations are actively researching cryptographic methods that can withstand future quantum attacks.