Zimba A, Chishimba M. Exploitation of DNS Tunneling for Optimization of Data Exfiltration in Malware-free APT Intrusions. zictjournal [Internet]. 2017 Dec. 11 [cited 2024 May 19];1(1):51-6. Available from: https://ictjournal.icict.org.zm/index.php/zictjournal/article/view/26