Mobile encryption firm Cellcrypt is to offer its Cellcrypt Mobile secure calling application for Apple's iOS platform to provide enhanced call security for the iPhone.
The company said that the application will allow iPhone owners to use its EMCP mobile encryption system to prevent attackers from intercepting and eavesdropping on voice calls.
The iOS application is being offered as a free download on the App Store, but will require a subscription to the Cellcrypt Encrypted Voice Service. The platform supports GSM and CDMA mobile networks as well as VoIP calls over Wi-Fi.
Cellcrypt chief executive Richard Greco said that feedback from users had been positive during tests carried out before the launch.
"In trials, customers are reporting international calling with near-perfect voice quality, and latency better than landline calling," he said.
The system is designed for enterprise and government use, and protects against what Cellcrypt believes to be a growing interest among cyber criminals in intercepting voice traffic.
Security experts have previously demonstrated systems that can collect voice traffic without user notification.
Researcher Chris Paget unveiled a £940 system at the Defcon 2010 security conference which was able to harvest all GSM call information from nearby handsets by acting as a cellular network tower.
Attackers have shown a renewed interest in the mobile space in recent months, and the Android platform is a popular target for malware writers.
Cotton seedling freezes to death as Chang'e-4 shuts down for the Moon's 14-day lunar night
Fortnite easily out-earns PUBG, Assassin's Creed Odyssey and Red Dead Redemption 2 in 2018
Meteor showers as a service will be visible for about 100 kilometres in all directions
Saturn's rings only formed in the past 100 million years, suggests analysis of Cassini space probe data
New findings contradict conventional belief that Saturn's rings were formed along with the planet about 4.5 billion years ago