Every few months, an important ceremony takes place. It’s not splashed all over the news, and it’s not attended by global dignitaries. It goes unnoticed by many, but its effects are felt across the globe. This ceremony helps make the internet more secure for billions of people.(more…)
Ongoing Community Work to Mitigate Domain Name System Security Threats
For over a decade, the Internet Corporation for Assigned Names and Numbers (ICANN) and its multi-stakeholder community have engaged in an extended dialogue on the topic of DNS abuse, and the need to define, measure and mitigate DNS-related security threats. With increasing global reliance on the internet and DNS for communication, connectivity and commerce, the members of this community have important parts to play in identifying, reporting and mitigating illegal or harmful behavior, within their respective roles and capabilities.(more…)
Industry Insights: Verisign, ICANN and Industry Partners Collaborate to Combat Botnets
Note: This article originally appeared in Verisign’s Q1 2021 Domain Name Industry Brief.
This article expands on observations of a botnet traffic group at various levels of the Domain Name System (DNS) hierarchy, presented at DNS-OARC 35.
Addressing DNS abuse and maintaining a healthy DNS ecosystem are important components of Verisign’s commitment to being a responsible steward of the internet. We continuously engage with the Internet Corporation for Assigned Names and Numbers (ICANN) and other industry partners to help ensure the secure, stable and resilient operation of the DNS.(more…)
Information Protection for the Domain Name System: Encryption and Minimization
This is the final in a multi-part series on cryptography and the Domain Name System (DNS).
In previous posts in this series, I’ve discussed a number of applications of cryptography to the DNS, many of them related to the Domain Name System Security Extensions (DNSSEC).
In this final blog post, I’ll turn attention to another application that may appear at first to be the most natural, though as it turns out, may not always be the most necessary: DNS encryption. (I’ve also written about DNS encryption as well as minimization in a separate post on DNS information protection.)(more…)
Securing the DNS in a Post-Quantum World: Hash-Based Signatures and Synthesized Zone Signing Keys
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.(more…)
Securing the DNS in a Post-Quantum World: New DNSSEC Algorithms on the Horizon
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.(more…)
Newer Cryptographic Advances for the Domain Name System: NSEC5 and Tokenized Queries
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.(more…)
Cryptographic Tools for Non-Existence in the Domain Name System: NSEC and NSEC3
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.(more…)
The Domain Name System: A Cryptographer’s Perspective
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.(more…)
Recognizing Lessons Learned From the First DNSSEC Key Rollover, a Year Later
A year ago, under the leadership of the Internet Corporation for Assigned Names and Numbers (ICANN), the internet naming community completed the first-ever rollover of the cryptographic key that plays a critical role in securing internet traffic worldwide. The ultimate success of that endeavor was due in large part to outreach efforts by ICANN and Verisign which, when coupled with the tireless efforts of the global internet measurement community, ensured that this significant event did not disrupt internet name resolution functions for billions of end users.(more…)