Twitter boss, Jack Doresy, had his Twitter account was hacked at the end of August, with hackers using his account to send a stream of offensive messages to his 4.2 million followers. It appears Jack was using his mobile phone to provide multi-factor authentication access to his Twitter account, a good solid security practice to adopt, however, it appears his Twitter account password and his mobile phone SMS service were both compromised, the latter probably due to either sim card swap fraud social engineering by the hacker, or by an insider at his mobile network service provider.

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