Congress grilled Mayer on why it took so long to let users know about the breach and why Yahoo! underestimated the number of accounts affected.
The 42-year-old, who testified before the Senate Commerce Committee on Capitol Hill in Washington on Wednesday, said the thefts occurred during her almost five-year tenure and she wants to 'sincerely apologize to each and every one of our users'.
Mayer apologized for both breaches and said that its hard for companies to fight against state-sponsored attackers who "tend to be more sophisticated, more persistent and who attack more targets.They're very good at hiding their tracks", she said.
Sen. Jerry Moran, a Republican from Kansas, pressed the Yahoo and Equifax executives on whether consumers can expect their data to be safer today in the wake of the breaches.
While speaking to lawmakers on Wednesday, former Yahoo CEO Marissa Mayer (above) apologized for Yahoo hacks and claims that no company is immune from them.
"Right now there's just not enough of a disincentive to hack", she said.
'As we all have witnessed: no company, individual or even government agency is immune from these threats, ' Mayer said.
The cyber thieves - identified by Mayer as Russian intelligence officers and state-sponsored actors - did not get their hands on "passwords in clear text, payment card data, or bank account information", Yahoo said at the time.
In March, federal prosecutors charged two Russian intelligence agents and two hackers with masterminding the 2014 theft of 500 million Yahoo accounts, the first time the U.S. government has criminally charged Russian spies for cyber crimes.
The Equifax breach exposed personal information of 145 million Americans earlier this year.
Mayer joined former and current CEOs of Equifax in testifying before the committee examining recent data breaches. Its chief security officer now reports directly to the CEO, and a new chief transformation officer is overseeing the firm's broader response. Bill Nelson (D-Fla.) said, "but when".
They say new laws may be necessary amid rising cyber attacks that threaten the privacy of personal data.
'A single federal standard would ensure all consumers are treated the same with regard to notification of data breaches that might cause them harm, ' Thune said.
Barros mentioned that Equifax is working on an application that would let customers lock and unlock personal credit data.
Yahoo! didn't disclose the breach until 2016 and initially said one billion accounts were affected.
Trump continues to use Twitter as his primary platform, a trend he started well before he entered the presidential election. The announcement reignited the conversation about whether 280 characters was something people on Twitter wanted or needed.
Petersburg, Florida. "Real life is better than my dreams", he wrote. "OK, I get it", she said, seeing the view from the clouds. On May 29, 2010, Halladay pitched the 20th flawless game in baseball history, beating the then-Florida Marlins 1-0.
Only two current Manchester United squad members are mentioned in the article on the BBC website: Luke Shaw and Marouane Fellaini. It is understood that the bosses want to tie him down to a new deal but there have been no negotiations so far.
Ziff Brothers Investments LLC invested in Russian Federation with Browder using offshore entities, Veselnitskaya has said . This is the first time Veselnitskaya has offered details of her version of the June 2016 sit-down at Trump Tower .
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RCMP adds that the investigation is in its infancy, but that they believe drugs and/or alcohol were factors in the incident. The suspect auto rammed into the back of the truck and ended up in the ditch near an industrial park on Township Road 510.
According to Farrow, Boies now regards it as a mistake to contract with and pay contractors that "we did not select and direct". These allegations were first published several weeks ago through bombshell reports in The New York Times and The New Yorker .
Trump and a desire to work together toward devising better solutions in response to the vast range of current worldwide problems". Trump and a desire to work together toward devising better solutions in response to a vast range of current global problems.
The Fire TV Stick with Alexa Voice Remote only costs $40, and as its name suggests, comes with a remote that has Alexa built-in. For many in Europe, streaming Amazon Prime is spotty unless the user has a Chromecast , set-top box, or TV that supports it.