Website Fingerprinting Attack Method Based on DNS Resolution Sequence

Aiming at the problem that the traditional fingerprinting attack feature extraction and attack method of HTTPS encrypted websites are difficult to effectively apply when using the CDN (Content Delivery Network) caching technology. In this paper, a fingerprinting attack method which uses the DNS resolution sequence in CDN as fingerprint and compares the fingerprint similarity of the websites using the longest common sub-sequence algorithm is proposed. The experimental results show that the average accuracy of the proposed method is 85.6%, and the standard fingerprint remains valid for a certain period of time, which can effectively identify HTTPS encrypted websites in CDN cache.