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There is a frequently quoted adage in communications that goes along the lines of “Good, Fast, Cheap: pick any two!” It may well be applied to many other forms of service design and delivery, but the basic idea is that high quality, high speed services are costly to obtain, and…
The recent attacks on the DNS infrastructure operated by DYN in October 2016 have generated a lot of comment in recent days. Indeed, it’s not often that the DNS itself has been prominent in the mainstream of news commentary, and in some ways this DNS DDOS prominence is for all…
Two years ago I reported on the use of the elliptical curve cryptographic algorithm in generating digital signatures for securing the DNS (DNSSEC) (http://www.potaroo.net/ispcol/2014-10/ecdsa.html). The conclusion at the time was hardly encouraging: “Will ECDSA ever be useful tool for DNS and DNSSEC? As good as ECDSA is in presenting strong…
Bruce Schneier’s recent blog post, “Someone is Learning How to Take Down the Internet”, reported that the incidence of DDOS attacks is on the rise. And by this he means that these attacks are on the rise both in the number of attacks and the intensity of each attack. A…
There are a number of ways to view the relationship between hosts and the network in the Internet. One view is that this is an example of two sets of cooperating entities that share a common goal: hosts and the network both want content to be delivered. Both have an…
The DNS is normally a relatively open protocol that smears its data (which is your data and mine too!) far and wide. Little wonder that the DNS is used in many ways, not just as a mundane name resolution protocol, but as a data channel for surveillance and as a…
DNS OARC held a two day workshop in Buenos Aires prior to IETF 95 at the end of March 2016. Here are my impressions of this meeting. For a supposedly simply query response protocol that maps names to IP addresses there a huge amount going on under the hood with…
In the world of public key cryptography, it is often observed that no private key can be a kept as an absolute secret forever. This does not mean that a private key remains a secret for a limited time and then the underlying cryptography spontaneously breaks apart and the key…
Measuring the Root KSK Keyroll A little over five years ago the root zone of the Domain Name System (DNS) was signed using the DNSSEC name-signing framework. The approach used to sign the root zone is a conventional one, using two keys. The root zone has a “working key”, the…
If you are at all interested in how the Internet’s Domain Name System (DNS) works, then one of the most rewarding meetings that is dedicated to this topic is the DNS OARC workshops. I attended the spring workshop in Amsterdam in early May, and the following are my impressions from…
