Hacker groups that stole data on the Yahoo!
cloud platform have been able to get back to their hacking ways.
A security researcher has told Al Jazeera that the groups behind the attacks are still working on cracking the encryption on Yahoo!’
S internal servers.
breach, first revealed by security firm FireEye, exposed the personal details of nearly a billion users.
It was reported last week that Yahoo!’z security team had uncovered more than 100,000 sensitive emails stored on Yahoo!
The breach has forced Yahoo!’ s parent company, Verizon, to close its data centers in the US, which had been the subject of a massive data breach in April.
Yahoo!’s website and email systems are currently offline.
“The only way to really restore security is to encrypt everything, which is why Yahoo!’ss security team has been working on new techniques,” the researcher told Aljazeera.
“This will take some time and is still a long way off, but we are hoping that we can get it done by the end of the year.”
Security researchers have been warning for years about the potential threat posed by a group known as the Distributed Denial of Service (DDoS) attacks, which have been used to cripple online services and force users to download new versions of the operating system.
While most companies have adopted measures to deal with DDoS attacks, security experts say it is difficult to ensure that all services and applications remain safe.
According to the latest figures from the US Department of Homeland Security (DHS), more than one million DDoS attempts were carried out in the first quarter of this year, representing a 60 per cent increase over the same period in 2016.
However, security researchers are increasingly calling for more stringent measures.
In February, researchers at security firm Kaspersky Lab published a report that detailed how attackers used software to trick the vulnerable Windows software into accepting the requests, bypassing a security mechanism.
In the latest breach, Yahoo!’ d servers were targeted by a distributed denial-of-service (DNS) attack, meaning the attacks were not limited to the US.
This is not the first time Yahoo!
has been hacked.
The social networking site was hit by a hack in 2014 that took down its Yahoo!
Earlier this month, a hacker stole data worth more than $1.7bn (£1.2bn) from the company, according to a statement from Yahoo!
and the company’s chief information security officer, Brian Krebs.
The attack was carried out by a team of hackers known as Team 8 and was carried by two separate groups, one which has since been identified as the Advanced Persistent Threat (APT) group.
This attack was not the only time Yahoo!’ security team was hit with DOTS attacks.
In April this year a team from the same group was also able to breach Yahoo!’ S servers.