Though a single key can be used to log on to several sites, you have to register each key separately, so if you use four keys at three services, that's twelve trips through registration processes.

They can be costly, especially if you want spares at home, work, on your keychain and in a safety deposit box. It can be a hassle to register them at websites. Hardware security keys have drawbacks of their own, though. Yubico on Wednesday released a new hardware security key, the 55 YubiKey 5C NFC, that brings new logon abilities to people who want a single key that works with their laptops and phones. Google has built hardware security key technology directly into Android phones, letting you dump the hardware security key altogether, but so far the technology isn't widely supported beyond Google itself. Whether you are looking to add a little personality to your YubiKey through a YubiStyle cover or just want to keep track of your YubiKey Nano, show off your individuality with YubiStyle accessories.

Hardware security keys aren't perfect, either, but they help thwart hackers who don't have access to the physical device. SMS codes and authenticator apps that generate short-lived numeric login code help a lot, but also have weaknesses. Password manager software can help you create and use strong, unique passwords, but it can be complex to use. Buy Yubico YubiKey 5C - Two Factor Authentication USB Security Key, Fits USB-C Ports - Protect Your Online Accounts with More Than a Password, FIDO Certified USB Password Key at Amazon.

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