In recent months, Google has started warning people about quantum computing and the future of online encryption. The company says the same security that protects your emails, banking and private messages today might not survive quantum computers.
Because of this, Google is already testing new forms of encryption to stay ahead of the problem.
However, experts agree that quantum computing is still very early. No existing quantum machine can break real-world encryption.
Today’s Encryption: RSA and ECC Work Fine
The warning might be urgent but today’s encryption works fine.
Currently, the most secure websites and apps use algorithms called RSA or ECC. These methods rely on difficult math problems and classical computers cannot solve those problems in any reasonable amount of time.
For example, breaking a 2048-bit RSA key would take billions of years using today’s technology.
As a result, your online transactions, private messages and stored files remain safe from ordinary hackers. So this means there’s no immediate danger.
Quantum Computing Is Fine (No Threat Yet)
At the moment, quantum computers are still experimental. They exist in research labs and have only a few dozen stable qubits. A machine capable of breaking RSA or ECC would need millions of qubits.
Therefore, experts estimate such a device is ten to twenty years away, if it ever arrives at all.
Also, current quantum computers make many errors. They cannot run the long calculations needed to crack real encryption.
Because of this, Google’s warning is not about an immediate danger. Instead, it is about planning for a future that may or may not happen.
Quantum Computing Could Break Today’s Encryption Later
Even though quantum computing is fine today, Google warns about a strategy called “Harvest Now, Decrypt Later”.
First, attackers copy encrypted data now. Then, they store it for years. They hope that a future quantum computer will eventually decrypt it.
Now, think about your long-term records like your medical records, financial statements, and government files. They need to stay private for decades.
If an adversary gets their hands on that data today, they could read it ten or twenty years from now.
Google’s Fix: Post-Quantum Cryptography (PQC)
To address this future risk, Google has started testing post-quantum cryptography in its Chrome browser.
First, Google implemented a hybrid key exchange called “X25519Kyber768”. It combines today’s classic encryption with a quantum-resistant algorithm.
As a result, even if quantum computers eventually break RSA, the Kyber part would still protect the data.
In addition, the U.S. National Institute of Standards and Technology (NIST) has already finalized three post-quantum standards. These include CRYSTALS-Kyber for general encryption. Google is helping to test these algorithms in real-world conditions.
However, post-quantum algorithms have downsides. They require larger keys and slower processing. Some are four kilobytes or more, compared to just 256 bytes for classic encryption.
Because of this, the transition will take years and require updates to countless devices.
What to Do
To reduce your risk, first keep all your devices updated. Manufacturers often release security patches that improve encryption.
Also, use strong, unique passwords for your routers, cameras and smart home devices.
At the same time, organizations should begin planning for crypto-agility.
That means designing systems that can swap out encryption algorithms without breaking. NIST recommends that companies audit where they use RSA or ECC, especially for long-lived data.
In addition, individuals can use apps that already support post-quantum cryptography. For example, Signal has added quantum-resistant features. However, this is not yet necessary for everyday safety. It is simply good practice for the future.
Finally, remember that quantum computing is fine right now. Google’s warning is responsible planning, not a sign of imminent collapse. By taking small steps today, you can ensure that your data remains private even if quantum computers eventually arrive.
