Following the biggest data breach in history, Yahoo now asks its users to change their passwords. But experts warn that changing passwords frequently might be counterproductive.

An email systems improvement together with the protection of user account data, requires a radical change of technology.

Fortunately, a few startups are already doing that. They are transforming email systems using Fourth Industrial Revolution technology.

For example, John McAfee Swiftmail is a mail system that runs on Bitcoin’s blockchain technology. 256 bit, end-to-end encryption protects Swiftmail data and renders data interception useless, claims the company.

“John McAfee Swiftmail is a decentralized, peer-to-peer, proof-of-work, encrypted mail system that uses bitcoin technology to replace email. A Swiftmail wallet address looks like this: ab99b776de244fe0f70f229921517829,” explains its website.

Cryptamail is another decentralized email system that runs on blockchain technology. Because the blockchain stores the messages, “there is no central point that stores your messages, so there is nowhere to steal or even submit a request for your private data,” affirms its website.

Current email systems are no longer secure. Yahoo recently revealed that it had suffered the world’s biggest-ever hack, compromising more than one billion user accounts. Hackers stole Yahoo users’ crucial personal data. Most disturbingly, the stolen information could have included unencrypted or encrypted security questions and their respective answers.

Yahoo reported that the hack of one billion user accounts occurred in August 2013. However, Yahoo announced it only on December 14, 2016. Forensic experts are still investigating the mega data breach. “We have not been able to identify the intrusion associated with this theft. We believe this incident is likely distinct from the incident we disclosed on September 22, 2016,” said Bob Lord, CISO Yahoo.

“Based on the ongoing investigation, we believe an unauthorized third party accessed our proprietary code to learn how to forge cookies.”

Previously, in September, Yahoo disclosed another incident in which information pertaining to 500 million user accounts was stolen in 2014.

Yahoo links these two major criminal incidents to “the same state-sponsored actor.”

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