The DNS TXT resource record is the one that without doubt provide users with
the most flexibility of content, as it is a largely unstructured. Although it
might be the ideal basis for storing any form of text-based information, it
also poses a security threat, as TXT records can also be used for malicious
and unintended practices. Yet, we reckon that TXT records are often overlooked
in security research. In this paper, we present the first structured study of
the uses of TXT records, with a…
