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1 Billion Accounts Have Data Stolen

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Yahoo has announced another huge security breach, leaving its users fretting once again about their personal information.

We understand that if you have seen the latest news articles on mainstream TV, a serious breach of data by Yahoo is again making the news. Reports on all major news agencies say the latestest data thefts have  affected more than one billion accounts, Yahoo (YHOO, Tech30) says. That's roughly double the number involved in the cybersecurity incident it announced in September, which is believed to be separate.

"Yahoo has now won the gold medal and the silver medal for the worst hacks in history," said Hemu Nigam, CEO of online security consultancy SSP Blue.

The embattled tech company said it's notifying users who may have been affected by the breach and making them change their passwords. The problem is it happened all the way back in August 2013. That means whoever plundered the information has had more than three years to exploit it, security experts say. But there are still several ways to make your information more secure.

Use different passwords for all online accounts

People who create a really strong password for one site but then use it across others are vulnerable to attacks, said Shuman Ghosemajumder, chief technology officer of Shape Security. Having your credentials stolen "is a matter of the lowest common denominator, the site with the least security," he said. Hackers obtained more than just names and passwords in the Yahoo breach -- they also nabbed answers to security questions. Cybercriminals can use that info to conduct automated attacks called "credential stuffing." That's when hackers take the stolen information of millions of users and build a program that tries to log in to other online accounts like banking, retail and airline rewards.

Yahoo is advising people to change the passwords and security answers on any other accounts for which they used the same or similar information as their Yahoo account. Since strong, unique passwords are a huge pain to memorize, Ghosemajumder recommends using a password manager. Platforms like 1Password or LastPass generate and store passwords and security answers for every account you have, so you only have to remember a single master password.

Beware of emails asking for more information

Hackers can use stolen credentials to craft emails that have the veneer of legitimacy, according to Nigam. Such emails might disclose the answer you gave to a security question, for example, and then ask if it's still up to date and request more information. "Criminals will give you information to gain your trust, and victimize you further," he said.

Related: Yahoo facing lawsuits in the wake of massive data breach

Be extra cautious about clicking on links or opening downloads from unknown email addresses. Never share any account information or passwords over email. Block access to your credit report Nigam recommends that you put "a freeze on your credit report and use a company that monitors your credit for you." Hackers who have valuable credentials will often try to open a credit card in your name.

Related: You could have a yahoo account without even knowing it

When that happens, the first thing a bank will do is run a credit check. If you've put a freeze on your credit report, you will be alerted that an institution is trying to run a check and can flag that you didn't request it.

"I would strongly recommend it, even if you don't have a Yahoo account," Nigam said. It's not all on you. Companies need to step up security measures to protect themselves not only against hacking, but also against the aftereffects of hacking like credential stuffing attacks, according to Ghosemajumder. "The trust that your users have in you is directly tied to the level of security they expect," he said. But what about closing accounts? After two major breaches, is it time to say goodbye to Yahoo?

Related: What to do if your Yahoo account was hacked

"If you don't have confidence [in Yahoo] in the future, that's a personal decision people need to make," Ghosemajumder said, noting that Yahoo has a large security team and has invested heavily in security.

"But I think this is a severe setback for them and the entire company," he added.

-- Heather Kelly contributed to this report. http://money.cnn.com/2016/12/15/technology/yahoo-security-breach-billion-users/

Yahoo released its semiannual transparency report today, the first issued by the company since Reuters revealed earlier this month that Yahoo scanned its users’ email accounts at the behest of the U.S. government.

In an effort to inform consumers about how frequently the government snoops on their information, and how often companies are able to narrow or refuse the requests, Yahoo and many other technology companies make public on a regular basis data about requests from law enforcement agencies for user data.

“We review demands for narrowness, legal sufficiency, duration, and scope, and consider all appropriate options before we comply, including seeking clarification or modification of the demand, or even challenging the demand in court,” Yahoo general counsel Ron Bell wrote in a blog post accompanying the transparency report.

Bell was reportedly one of the Yahoo executives, along with CEO Marissa Mayer, who approved the installation of software in spring 2015 that scanned Yahoo email accounts for specific data. The software was quickly discovered by members of Yahoo’s security team, who initially believed hackers had broken in and installed the program. The resulting clash between leadership and security engineers reportedly lead to the departure of chief information security officer Alex Stamos.

As we previously reported, Yaho’s spring 2015 transparency report does not reflect an unusually high number data disclosures to the government, as might be expected from a dragnet email scanning program. At the time, the company only reported 21,000-21,499 user accounts requested under the Foreign Intelligence Surveillance Act and 0-499 accounts requested with National Security Letters. However, Yahoo allegedly scanned all of its nearly 300 million users’ email accounts — a vastly larger group than reported.


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