“Yahoo on Wednesday disclosed a second data breach — and it’s a biggie,” James Covert reports for The New York Post.

“The struggling Web pioneer said a hack in August 2013 had compromised more than 1 billion user accounts — twice the size of an already-huge hack it revealed in September,” Covert reports. “The newly discovered breach — which looks like the largest hack of all time, according to security experts — may have spilled an unprecedented trove of stolen e-mail addresses, telephone numbers, passwords and even security questions and answers, Yahoo said late Wednesday.”

“Yahoo said it is forcing all affected users to change their passwords and is invalidating unencrypted security questions — tough measures that it failed to take after it discovered the 500 million user-account hack earlier this fall,” Covert reports. “The news sent Yahoo’s stock sliding 2.5 percent, to $39.90, in extended trading.”

Read more in the full article here.

MacDailyNews Take: What a mess. At this rate, damaged-goods Yahoo will be paying Verizon to “buy” them.

Yahoo secretly scanned all customer emails for FBI, NSA, sources say – October 4, 2016
Yahoo confirms data breach of at least 500 million user accounts – September 22, 2016
Verizon to acquire beleaguered Yahoo for $4.8 billion – July 25, 2016

[Thanks to MacDailyNews Reader “Lynn Weiler” for the heads up.]