"David Karp is one of the most inspiring, insightful entrepreneurs that I have ever met," said Mayer, who worked closely with Google co-founders Larry Page and Sergey Brin during her time at the company. David Karp, a 26-year-old high school dropout who started Tumblr six years ago, will remain in control of the service in an effort to retain the same "irreverence, wit and commitment to empower creators," Yahoo said. Mayer praised Tumblr as a fount of creativity that attracts 300 million visitors each month. Taking over Tumblr will devour about one-fifth of the $5.4 billion in cash that Yahoo had in its accounts at the end of March. Yahoo is paying mostly cash for Tumblr, dipping into what remains of a $7.6 billion windfall reaped last year from selling about half of its stake in Chinese Internet company Alibaba Holdings Group. Mayer told analysts that she is "making a sincere promise to not screw it up." It marks Yahoo's most expensive acquisition since it bought online search engine Overture a decade ago for $1.3 billion in cash and stock. The deal announced Monday is Mayer's boldest move since she left Google 10 months ago to lead Yahoo's latest comeback attempt. While the data may be old, it’s just as valuable and important to protect as any other.Yahoo's CEO is making a $1.1 billion bet on the online blogging forum Tumblr as Marissa Mayer tries to make a former Internet icon cool again. It’s very common for people to use the same email address and password on various social media sites, so when one is compromised, the others are at risk as well, which in turn can unlock email, online banking accounts, and more. Impacted users should not only reset their password, but any identical passwords on other accounts. With any luck, the password reset was quick enough to protect all accounts from unauthorized access, although that alone does not solve the entire problem. The good news is that Tumblr security states there have not yet been any attempts by outside parties to log in to any of the compromised accounts. As a precaution, however, we will be requiring affected Tumblr users to set a new password. Our analysis gives us no reason to believe that this information was used to access Tumblr accounts. As soon as we became aware of this, our security team thoroughly investigated the matter. “We recently learned that a third party had obtained access to a set of Tumblr user email addresses with salted and hashed passwords from early 2013, prior to the acquisition of Tumblr by Yahoo. Considering there are over 550 million accounts on Tumblr, only a small portion may be at risk, but a small portion of 550 million is still a lot. However, Yahoo did not specify if the data was obtained through a previous data breach or a misplaced backup, nor did it specify how many users were impacted. While the only information stolen was login info, such as email and passwords, those can still be put to use by cyber criminals. Nothing more recent than that was compromised, so users who recently set up accounts do not have to worry. What and WhenĪccording to reports, the data obtained dates back to 2013, from before Yahoo acquired Tumblr. However, Yahoo (which owns Tumblr) states that there was not any new hack or leak, and the stolen account information may have been taken from an attack from before its acquisition. The social network Tumblr has begun a wave of password resets, following a data breach in which a third party obtained the login information for several accounts.
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