The phrase "adding another layer of protection" is correct and usable in written English.
It can be used when discussing measures taken to enhance security or safety in various contexts, such as technology, personal safety, or risk management.
Example: "By implementing two-factor authentication, we are adding another layer of protection to our online accounts."
Alternatives: "providing extra security" or "enhancing safety measures."
"The bill that I'm sponsoring simply fulfills the intent of the efforts that were started over a decade ago by adding another layer of protection".
Dr. Richard O. Spertzel, a microbiologist who led the United Nations inspections for germ weapons in Iraq, defended the new laboratories as critical to national security, noting that some would be built on military bases behind barbed wire, adding another layer of protection.
The company says the ring will soon add support for fingerprint and facial recognition in-app, adding another layer of protection for users.
By paying with Apple Pay, your transactions are encrypted between your devices and Apple Pay servers, and the online merchant won't need to save your actual credit card number, adding another layer of protection.
That's why companies like Google, Mozilla, Facebook and Twitter have added another layer of protection, called Perfect Forward Secrecy.
The tunnel also adds another layer of protection to winter crops growing under the row covers, and offers a layer of protection for taller crops like broccoli, Brussels sprouts, leeks, Swiss chard and kale.
The transport subcontractors themselves add another layer of protection for both the brokers in the border area and outside buyers, because no one here will do business with a farang, as foreigners are known.
You can add another layer of protection by isolating your smart home devices from your computers and smartphones using a guest network, a common option in many popular routers.
The proposed new subsidy would add another layer of protection to guarantee 10 to 15 percent of a farmer's revenue, paying out not only in years of heavy losses, but also when revenue dipped less severely.
To ease the pain, Congress threw in a 45-cents-a-gallon subsidy ($6 billion a year); to add another layer of protection, it imposed a tariff on imported ethanol of 54 cents a gallon.
