IEEE/ICACT20230129 Slide.09        [Big Slide]       [YouTube] Oral Presentation
The following procedure was employed in the collection of CT logs and construction of DNS graphs. In step 1, our collection system first fetches digital certificates from CT logs via CertStream, and retrieves all website domain names from these digital certificates. In step 2, the obtained domain name is translated via forward DNS lookup to an IP address that is the value of the A record in the DNS response. In step 3, the IP address obtained in step 2 is translated via reverse DNS lookup to a domain name that is the value of the PTR record in the DNS response.

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