Quantum Leap: Unmasking the Science Behind Quantum Computing’s Dual Impact

By Dan Evert, CCNP   Published: 03/30/25   Updated: 10/20/26   3 min read

Quantum Leap: Unmasking the Science Behind Quantum Computing’s Dual Impact

Quantum computing’s two sides, in brief

Why quantum cuts both ways for encryption

Quantum computing promises a huge jump in raw computing power. That is exciting. It is also a problem for cryptography, because experts expect quantum machines to be able to break the encryption codes that protect data today, while they also see quantum methods as the basis for the next generation of protection.

The biggest worry is simple: a working quantum computer could crack the cryptographic algorithms that secure most of the world’s data, which would leave widely used encryption obsolete. The same quantum principles cut the other way too. They could support encryption systems that classical computers cannot break at all.

IBM, Google and the startups

Big companies and young startups are both racing for quantum leads. IBM and Google are out in front. IBM’s Quantum Experience platform and Google’s Sycamore processor have shown what quantum hardware can do, in security and well outside it.

Behind them sit many startups working where quantum computing meets security. Some focus on the risks. Others build tools that use quantum effects for protection, and the best of them are stretching what defenders think is possible.

Rules and ethics lag the hardware

Regulators and industry cannot wait for a quantum breakthrough before acting. Governments and companies need frameworks that can keep up with fast technical change while limiting the threats it brings. International cooperation will matter here. No single country can set the rules for a technology this powerful on its own.

There are ethical questions as well. Who owns the data quantum systems can unlock, how privacy holds up, and who gets the benefits are all open. Regulators have to encourage innovation and still put guardrails around public and private assets, a hard balance to strike.

Post-quantum cryptography is the next step

Quantum computing will be a major focus of research for years. Its ability to upset current security protocols is hard to overstate, and that is pushing the industry to speed up work on post-quantum cryptography and other defenses.

Security researchers want to use quantum mechanics to their advantage. They also have to prepare for attackers who will try the same. Doing both at once will take a lot of cooperation, and it will change how computing works across many sectors.

Preparing for the quantum era

Quantum computing could reshape the structure of computing itself, with security as only one part of that change. Getting through the risk and the opportunity will need technical work, careful policy and some ethical guardrails.

Technology firms, industry groups and governments will need to move quickly and in step. Plan for the weak points now. Plan for the new protections too. How well the quantum transition goes will depend on how ready people are to use the technology with precision and foresight.

Stay Current

Newer CyberExperts coverage on this topic

This article still works as background. If you want the current picture, start with the freshest related coverage below and today's brief.

Latest Daily Brief

Friday’s brief: GitLab’s 10.0 fix, then VeloCloud attacks, a poisoned LiteLLM release and PHP2Shell logs to check

The fastest way to catch up on what changed after this article was published.

Read Today's Brief

Dan Evert, CCNP

Dan Evert is a self proclaimed Router Jockey. Dan got heavily involved in networking right out of high school and has never looked back! Dan is giving back by working with high school students to get them involved and interested in Networking and Security.