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If you’ve heard us say it once, you’ve heard it a thousand times: Turn on two-factor authentication. Do it for every important account you have, especially banking, email and social media. Do it to avoid hacks, and do it now.
Last week, Twitter announced it would no longer let people use the most common form of two-factor authentication — a numeric code sent over text message — free. Instead, users are being told to either sign up for the $8-a-month Twitter Blue service or switch to a different type of two-factor authentication by March 20.
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