On the other hand, quantum computers could be used to generate more powerful encryption techniques. Just as hacking becomes more powerful with greater resources, so does security. The only danger here is if one party has access to quantum computing and the other does not. When the technology for quantum computing is achieved, it is imperative that it be accessible to everyone. A basic explanation of how the two differ will illustrate.
Modern computers manipulate information in the form of on and off signals.
Two bits can form four combinations of on and off states. In a standard PC you might have 8 billion bits, providing a fairly large potential for information. Quantum computing accomplishes this task differently. Quantum bits, often referred to as quebits, can attain multiple states simultaneously-each state having a probability. So each combination of on and off would require a probability.