One nice thing that’s come about from the increased scrutiny that online security has been receiving is that it’s gone from being considered paranoid to becoming completely expected to be notified regarding incidents such as new logins, password changes, failed 2FA attempts, and other security-related activity. But any time a metric gets noticed, it also gets gamified and either decreases in value or ceases to be relevant altogether – a principal first documented by British economist Charles Goodhart and now known as Goodhart’s Law and demonstrated in this wonderful Sketch Plantations depiction:
Regarding Twitter’s “new login from unknown device” alerts…
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