two-factor_authentication
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two-factor_authentication [2019/08/21 06:45] – neil | two-factor_authentication [2019/09/08 12:51] – neil | ||
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* [[two-factor_authentication# | * [[two-factor_authentication# | ||
* [[two-factor_authentication# | * [[two-factor_authentication# | ||
+ | * [[two-factor_authentication# | ||
====" | ====" | ||
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Check first that you can use whatever two-factor approach you are using on whatever devices you tend to use. If you primarily use your phone, and the service requires a hardware device which is incompatible with your phone, you'll be causing yourself a lot of inconvenience, | Check first that you can use whatever two-factor approach you are using on whatever devices you tend to use. If you primarily use your phone, and the service requires a hardware device which is incompatible with your phone, you'll be causing yourself a lot of inconvenience, | ||
+ | |||
+ | Some password managers will suggest logins for which two-factor authentication is available. There' | ||
====Have a back-up mechanism in case you lose your device(s)==== | ====Have a back-up mechanism in case you lose your device(s)==== | ||
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These one-time codes are usually generated by a piece of software on your computer or phone, or else through a dedicated hardware device. | These one-time codes are usually generated by a piece of software on your computer or phone, or else through a dedicated hardware device. | ||
- | ===Time-based One-Time Passwords (TOTP)=== | + | ===Time-based One-Time Passwords (TOTP) |
+ | Â | ||
+ | Lots of sites support one-time codes, which changes after a few seconds. This is known as " | ||
+ | Â | ||
+ | Once set up, you need to log in using your username and password, and then put in the current code before it expires. This means that you always need to have the mechanism to generate the code to hand, when you want to log in. | ||
+ | Â | ||
+ | These work by generating a special code, which you store on a device, and which the service stores. So, to use TOTP, you need a means of storing this special code. (You may not even see the special code; you may just need to scan a QR code, which automates the storage, so that you see only the effect of it, which is the generation of six-digit one-time passwords, which change routinely). | ||
+ | Â | ||
+ | You might be able to use [[passwords# | ||
+ | Â | ||
+ | Alternatively, | ||
+ | Â | ||
+ | You might also use a hardware device. | ||
===Avoid text message for delivery of codes === | ===Avoid text message for delivery of codes === | ||
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Second, if someone manages to hijack your phone number (sometimes known as "SIM swapping" | Second, if someone manages to hijack your phone number (sometimes known as "SIM swapping" | ||
+ | |||
+ | Third, if you are out of signal, you cannot get your code — no good for places with Internet connectivity, | ||
two-factor_authentication.txt · Last modified: 2022/09/08 09:09 by neil