asterisk users - Feb 2016 - Class 5 and softphone app supporting ZRTP

Hi All,

I am looking for a class 5 platform (basic VAS) and softphone (IOS,
Android) both supporting ZRTP protocol to achieve the highest voice
security.
C.5 and UA should be delivered from the same supplier (like sipwise for
instance)

Could anybody recommend me any solution here?

Thanks in advanced
Maciej
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