German encryption firm SecurStar has strenuously denied being behind an apparently independent test of voice encryption products that found many of its rivals could be hacked using a $100 phone-tapping program. The tests by an anonymous researcher, ‘Notrax’, found that all but three programs and hardware products looked at could be bypassed by installing a simple wiretapping Trojan called FlexiSPY to record voice output without the programs giving the user any indication that security had been compromised. The company’s CEO, Wilfried Hafner, has a track record of security research himself, having in 2006 publicised a GSM hack using the same program.”]
Source: https://www.csoonline.com/article/2124808/accusations-fly-over-voice-encryption-hack.html