The Internet Corporation for Assigned Names and Numbers is moving — carefully — to upgrade the DNS root zone key by which all domains can be authenticated under the DNS Security Extensions protocol.
ICANN is the organization responsible for managing the Domain Name System, and DNS Security Extensions (DNSSEC) authenticates DNS responses, preventing man-in-the-middle attacks in which the attacker hijacks legitimate domain resolution requests and replaces them with fraudulent domain addresses.
DNSSEC still relies on the original DNS root zone key generated in 2010. That 1024-bit RSA key is scheduled to be replaced with a 2048-bit RSA key next October. Although experts are split over the effectiveness of DNSSEC, the update of the current root zone key signing key (KSK) is long overdue.