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An embarrassing typo suggests that MasterCard’s monitoring isn’t as good as it should be, tricky offsite backups, why two-factor authentication over SMS is a bad idea, and keeping two Mac laptops in sync.

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MasterCard DNS Error Went Unnoticed for Years

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We were asked about tricky offsite backups, why Two-factor authentication over SMS is a bad idea, and keeping two Mac laptops in sync.

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