The airline said the incident has been resolved and all systems are working normally.
Alex Cruz, BA's chairman has apologized for the disruption and said the company was "deeply sorry".
British Airways (BA) has revealed it's been the subject of a massive data breach thought to have affected hundreds of thousands of customers over a two week-period last month. To have your customers' financial information stolen by unidentified hackers.
The company says its website is working properly now.
BA advised customers to contact their bank or credit card provider and follow their recommended advice. They stopped the breach and notified the relevant authorities. Fortunately, neither passport nor travel information was exposed to the hackers.
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However Enza Iannopollo, privacy and security analyst at advisory group Forrester, said BA could have done better on informing those affected.
The airline added that customers due to travel could check in online as normal.
BA's website has a page with further information on the breach here, where it confirms that "Every customer affected will be fully reimbursed and we will pay for a credit checking service".
The airline apologised for the disruption that this criminal activity has caused. It plans to handle any financial claims on an individual basis. Paul Lipman, chief executive of cybersecurity company Bullguard, said customers' credit data was "almost certainly up for sale on the dark web as we speak".
Things are looking up for British Airways.
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The plan will also secure the Russian Hmeimim military base in Latakia province and mineral deposits in the region, it said. That also includes an estimated 10,000 hardcore militants, including those linked to Al Qaeda.
A spokesman for the Information Commissioner's Office said they would be making inquiries about the data theft.
If your data is included in this breach, you'll need to take action to protect yourself. You know, just in case.
Cruz said the hack was not a breach of the airline's encryption.
Just a month after the new European Union rules on data came into force - General Data Protection Regulation, or GDPR - members of BA's frequent flyer programme received an email reassuring them about the security of their information.
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