RPKI stands for Resource Public Key Infrastructure. It is a security framework that uses public key cryptography to verify the authenticity and validity of BGP route announcements on the Internet. RPKI allows network owners to create digital certificates and attestations that link their IP addresses and AS numbers to a trust anchor. This way, other networks can check if the routes they receive are authorized by the legitimate holders of the resources. RPKI helps prevent route hijacking and other attacks that can disrupt the Internet’s routing infrastructure.