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accounts. On 6 November, TalkTalk stated that the impact of the breach was "much more limited than initially suspected", adding that 156,959 customer accounts were involved, from which 15,656 sort codes and bank account numbers had been taken. Partial data on 28,000 credit and debit cards was also stolen, but that data was insufficient for carrying out transactions on those cards. TalkTalk stated that the lost data had not been encrypted, and that they had not been legally required to encrypt it.
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It was initially thought that up to 4 million customers could be affected by the breach. On 24 October, TalkTalk issued a statement saying that a "materially lower" amount of customers’ financial information was stolen, and that the stolen data was not sufficient for money to be taken from bank
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In
September 2016, hacker Daniel Kelley was charged with blackmail, computer hacking, and fraud in connection with the TalkTalk data breach and various other attacks. He pleaded guilty to 11 of the offences later that year. He was sentenced to 4 years jail time in 2019.
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In the course of the attack, TalkTalk received a ransom demand from a group claiming to be responsible. Some customers complained that they were targeted by criminals before TalkTalk disclosed the cyber-attack, and the Chair of the
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experienced a cyber attack that resulted in a data breach. As a consequence, personal and banking details of around 160,000 customers were illegally accessed.
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said "Suggestions that TalkTalk has covered up both the scale and duration of this attack ... must be thoroughly investigated."
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The direct and indirect costs of the attack for TalkTalk have been estimated at
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426:"TalkTalk's Cyber Security Negligence Gets Hit With £400,000 ICO Fine"
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77 million. On 5 October 2016, TalkTalk was fined £400,000 by the
344:"TalkTalk cyber-attack not as bad as first thought, company says"
90:"TalkTalk cyber-attack: Boss 'very sorry for security breach'"
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248:"TalkTalk hack attack: Friends jailed for cyber-crimes"
219:"TalkTalk hacker Daniel Kelley sentenced to four years"
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October 2015, British telecommunications provider
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60:Aftermath
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18:TalkTalk
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