This is the fifth in a multi-part series on cryptography and the Domain Name System (DNS).

In my last article, I described efforts underway to standardize new cryptographic algorithms that are designed to be less vulnerable to potential future advances in quantum computing. I also reviewed operational challenges to be considered when adding new algorithms to the DNS Security Extensions (DNSSEC).

In this post, I’ll look at hash-based signatures, a family of post-quantum algorithms that could be a good match for DNSSEC from the perspective of infrastructure stability.

This is the fourth in a multi-part series on cryptography and the Domain Name System (DNS).

One of the “key” questions cryptographers have been asking for the past decade or more is what to do about the potential future development of a large-scale quantum computer.

This is the third in a multi-part blog series on cryptography and the Domain Name System (DNS).

In my last post, I looked at what happens when a DNS query renders a “negative” response – i.e., when a domain name doesn’t exist. I then examined two cryptographic approaches to handling negative responses: NSEC and NSEC3. In this post, I will examine a third approach, NSEC5, and a related concept that protects client information, tokenized queries.

This is the second in a multi-part blog series on cryptography and the Domain Name System (DNS).

In my previous post, I described the first broad scale deployment of cryptography in the DNS, known as the Domain Name System Security Extensions (DNSSEC). I described how a name server can enable a requester to validate the correctness of a “positive” response to a query — when a queried domain name exists — by adding a digital signature to the DNS response returned.

This is the first in a multi-part blog series on cryptography and the Domain Name System (DNS).

As one of the earliest protocols in the internet, the DNS emerged in an era in which today’s global network was still an experiment. Security was not a primary consideration then, and the design of the DNS, like other parts of the internet of the day, did not have cryptography built in.