DNSSEC is a technology that was developed to, among other things, protect against such attacks by digitally 'signing' data so you can be assured it is valid. However, in order to eliminate the vulnerability from the Internet, it must be deployed at each step in the lookup from root zone to final domain name (e.g., www.icann.org). Signing the root (deploying DNSSEC on the root zone) is a necessary step in this overall processii. Importantly it does not encrypt data. It just attests to the validity of the address of the site you visit.
Full deployment of DNSSEC will ensure the end user is connecting to the actual web site or other service corresponding to a particular domain name. Although this will not solve all the security problems of the Internet, it does protect a critical piece of it - the directory lookup - complementing other technologies such as SSL (https:) that protect the "conversation", and provide a platform for yet to be developed security improvements.
verisignlabs.com DNSSEC Checker - Online DNSSEC Checking Tool
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