Quantum computers have the potential to solve certain problems much more efficiently than classical computers. However, they are not expected to break all classical computer code. Let me explain further.
Quantum computers operate on the principles of quantum mechanics, utilizing quantum bits or qubits, which can exist in superposition states and entangled states. This enables quantum computers to perform certain computations, such as factoring large numbers, solving certain optimization problems, and simulating quantum systems, more efficiently than classical computers.
On the other hand, classical computers, including the ones running the code you use today, are designed based on classical physics and classical bits, which are either in a 0 or 1 state. Classical computers are highly effective for a wide range of tasks, such as general-purpose computing, data processing, and running most software applications.
It's important to note that quantum computers excel in solving specific types of problems, while classical computers are better suited for other types. For most everyday tasks and software applications, classical computers are expected to remain the preferred choice.
However, in the future, when quantum computers become more powerful and widespread, there may be specific algorithms or cryptographic schemes that are currently secure on classical computers but could be vulnerable to quantum attacks. For example, the widely used RSA and ECC encryption algorithms rely on the difficulty of factoring large numbers, which can be efficiently solved by quantum computers using Shor's algorithm. In such cases, new quantum-resistant algorithms and cryptographic techniques will need to be developed and implemented to ensure security.
In summary, while quantum computers have the potential to outperform classical computers on certain problems, they are not expected to break all classical computer code. Classical computers will continue to be essential for most computing tasks, and the impact of quantum computers will be more targeted towards specific domains and applications.