Rotating cryptographic keys is a security best practice, so it’s good news that ICANN has begun the process to change the root key pair underpinning the security of the DNS. While the chances of a misstep is small, the fact remains that changing the root key pair has never been done before. A mistake can potentially — temporarily — break the Internet.

No pressure, ICANN.

As the phone book of the Internet, DNS translates easy-to-remember domain names into IP addresses so that users don’t have to remember strings of numbers in order to access web applications and services. However, attackers can hijack legitimate DNS requests to divert users to fraudulent sites through DNS cache poisoning or DNS spoofing.

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Source: Security