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The Yahoo hack seems to be the gift (curse?) that keeps on giving. This is in light of the news that the company has discovered a 3-year-old security breach that enabled a hacker to compromise more than 1 billion user accounts.
This breach has made it so that Yahoo has broken the record of the biggest hack in history set by-- Yahoo.
The hack occurred in 2013, making it even older than the hack that Yahoo initially announced which affected half of the 1 Billion number hit by this one.
"It's shocking," security expert Avivah Litan of Gartner Inc.
Both lapses occurred during the reign of Yahoo CEO Marissa Mayer, a once-lauded leader who found herself unable to turn around the company in the four years since her arrival.
Yahoo didn't say if it believes the same hacker might have pulled off two separate attacks. The Sunnyvale, California, company blamed the late 2014 attack on a hacker affiliated with an unidentified foreign government, but said it hasn't been able to identify the source behind the 2013 intrusion.
Yahoo has more than a billion monthly active users.
In both attacks, the stolen information included names, email addresses, phone numbers, birthdates and security questions and answers. The company says it believes bank-account information and payment-card data were not affected.
But hackers also apparently stole passwords in both attacks. Technically, those passwords should be secure; Yahoo said they were scrambled twice — once by encryption and once by another technique called hashing. But hackers have become adept at cracking secured passwords by assembling huge dictionaries of similarly scrambled phrases and matching them against stolen password databases.
The problem with this is that those who have used their Yahoo passwords for other online accounts. Those who had changed theirs before  September should be fine.
This naturally causes a problem for Yahoo with their impending partnership with Verizon now on the rocks due to this revelation. It remains to be seen what happens going forward now for Yahoo.

Reports indicate that there has been a massive leak of login credentials for Twitter, one of the world's most used social media platform. 

The number reportedly reaches 32 million. Their passwords have been compromised and are now online. The belief is that it is now on sale on the dark web, though Twitter maintains that the leak is not as a result of a breach of its systems.
“We are confident that these usernames and credentials were not obtained by a Twitter data breach – our systems have not been breached. In fact, we’ve been working to help keep accounts protected by checking our data against what’s been shared from recent other password leaks,” says a spokesperson for Twitter.
The leaked data is said to contain usernames, passwords, and email addresses of 32,888,30 users. LeakedSource, a search engine for leaked login credentials, believes that these credentials have been stolen through malware infecting popular browsers like Chrome and Firefox, instead of a breach of Twitter’s systems. The bulk of the users affected by this leak appear to be from Russia.
This hasn't been the only breach in recent times, both LinkedIn and MySpace have also suffered breaches such as this and as a precaution users are advised not to use the same password everywhere. 
Different services should have different passwords and having a two-factor authentication enables on services that offer this additional security feature would not be amiss either. 
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