ZRTP Detriments

• Complete End-to-End Encryption!

• • Not good for CALEA compliance (but does it even need to comply?)
  • Not good for business requirements such as call recording

• Patented ...but wait!

• • Royalty-free licensing
  • Licensing requires conforming to spec
  • Spec includes anti-backdoor features

• ZID of the endpoint is sent in the clear