DNS data exfiltration poses a significant threat to mobile computing mainly because it is challenging to differentiate between malicious activity and legitimate DNS traffic. Attackers can exploit this by embedding data within DNS queries and responses, which often go unnoticed because DNS traffic is generally allowed through firewalls and security systems without triggering alerts. This method of data theft can be particularly effective in mobile computing, where devices frequently switch networks and rely on DNS for connectivity.

References = ISACA’s resources on cybersecurity risks associated with DNS highlight the difficulty in detecting DNS data exfiltration due to its ability to blend in with normal traffic. This is further supported by industry resources that discuss the challenges in identifying and preventing such exfiltration techniques1234.