Twitter mentioned Thursday that it has been introducing security tools and ramping up teaching for its workers, right after a hack in July demonstrated how susceptible substantial-profile accounts could be.

The accounts of Barack Obama, Jeff Bezos, Joe Biden, Elon Musk and other higher-profile individuals ended up between those utilized in the hack, in which their accounts questioned buyers to transfer bitcoin in exchange for extra in return. A Florida teen and two other individuals were afterwards billed.

Twitter explained in a site post that it was rolling out new protection keys that would be resistant to phishing attempts, in which hackers try to swipe employees’ personal computer login qualifications.

“This is do the job we experienced currently started but have accelerated in modern months,” Parag Agrawal, chief technology officer, and Damien Kieran, knowledge defense officer, wrote.

“This will support cut down the chance of an unauthorized 3rd-bash attaining entry to our internal methods applying compromised staff qualifications,” they wrote.

Twitter mentioned it had also introduced new instruction courses for cybersecurity and greater the frequency and availability of current courses for all employees. “For example, we launched two new required coaching sessions for men and women who have access to nonpublic details,” Agrawal and Kieran wrote in the site put up.

Twitter CEO Jack Dorsey has beforehand reported that the hack included failures by the company’s workers who had been issue to manipulation by the hackers. The organization “fell behind, both in our protections versus social engineering of our workers and constraints on our interior applications,” Dorsey stated in July.

Twitter did not immediately react to a ask for for comment Thursday on whether or not the firm had uncovered intentional wrongdoing among its staff members.