In each case we are going to tell you its operation, advantages and disadvantages, and your understanding will be left to elucidate which is the one that best suits your needs depending on the level of security you are looking for and the complexity of the device. Next we are going to tell you what, in our point of view, are the best 2FA USB that you can buy on the market. In any case, it is like when you have an alarm in your house: it serves to deter thieves and keep your home more protected than if you do not have it, but it is not infallible either.
You must bear in mind that these devices do not encrypt the content of your hard drive, but simply block the login, so if you have confidential information that you do not want to be accessible, you should combine these devices with disk encryption. Even so, several of the devices that we are going to talk about below have additional protection methods and not just the fact that they are connected, such as a fingerprint reader for example. These USB 2FA are a physical device that must be connected to a PC to unlock it, so that even if someone else knows your password in some way, they cannot access your PC if this device is not connected to the computer. Even if someone else knows your password or it has been leaked or hacked, if the other person does not have access to your email address, the physical coordinate card or your mobile phone, they will not be able to access the service. The purpose of this authentication method is to ensure that the correct person is accessing the service.
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