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Secure Calling and Instant Messaging
for iOS and Android devices.

appstore googleplay


KeyTone is a high assurance mobile communications app - enabling secure calls and instant messaging over WiFi & 3G/4G networks. KeyTone uses standards-based protocols and cryptography for establishing and protecting data communications between KeyTone app users.

  • Single App for secure (encrypted) calling and instant messaging (IM)
  • Works over WiFi and 3G/4G networks
  • Available for iOS and Android devices


We are dedicated to providing our customers with best in class support and user experiences. If you have questions, support issues, comments, or feedback about KeyTone, we want to hear from you!

Keytone Support

Privacy & Terms

The terms and conditions, which include the Mocana Mobile Application Privacy Notice are available here:

Privacy & Terms


General Features & Benefits

  • Single App for secure calling and instant messaging (IM)
  • Intuitive and easy to use
  • Runs in background to maximize battery life
  • Works over Wi-Fi and 3G/4G data networks
  • Automatically finds contacts with KeyTone addresses within your contact list
  • Works seamlessly – Supports Industry standard protocols
  • VoIP, SIP, & ICE
  • Selectable Audio Codecs for maximum voice quality
  • iLBC, G.711 µ-law, G.711 a-law, & Linear PCM
  • Cross platform support – secure communications to any KeyTone app

Security Features & Benefits:

  • High assurance solution developed by security experts Mocana Corp.
  • 10+ years of trusted security implementations & integration experience
  • Robust & Proven Cryptography, including Suite B algorithms
  • Encryption: Advanced Encryption Standard, Galois / Counter Mode (AES-GCM-256)
  • Digital Signature: Elliptic-Curve Digital Signature Algorithm (ECDSA p-384)
  • Key Exchange: Elliptic-Curve Diffie-Hellman (ECDH)
  • Hashing: Secure Hash Algorithm message digest (SHA-256 and SHA-384)
  • Two security modes: SDES-SRTP & DTLS-SRTP
  • Mid-call Security Promotion with a Single Swipe (SDES-SRTP → DTLS-SRTP)


What is KeyTone?
KeyTone is a high assurance mobile communications app - enabling secure calls and instant messaging over WiFi & 3G/4G networks. KeyTone uses standards-based protocols and cryptography for establishing and protecting data communications between KeyTone app users.The answer to the question goes here.
How much does KeyTone cost?
The KeyTone app is FREE. However, when you use KeyTone on a 3G / 4G network you might incur operator data charges or internet access fees.
How & where can I get KeyTone?
One way is to contact us at sales@mocana.com with more specific questions.
What are the device requirements for KeyTone?
KeyTone requires a mobile device (such as a smartphone or tablet) running one of the following operating systems: Android 2.3, 3.x, 4.x, 5.x. For iOS, 6.x, 7.x, 8.x
How do I configure KeyTone?
Configuring KeyTone is easy. Upon initial launch of the app, you will be prompted to setup a KeyTone account. Select "Yes" and this will auto generate an email for you. Once your account is approved, you will be sent a configuration file. Simply click on this configuration file to setup the app. It's that easy! If you have questions or need support, email us at Support@keytone.net
Do both parties need to have the KeyTone App to communicate securely?
Yes. If you are using KeyTone to make a secure call or instant message, then the recipient must also have KeyTone installed on their on their device and have active KeyTone account.
Do I need to import my contacts into KeyTone?
No. KeyTone will import your native contacts for you. However, you will need to add a KeyTone address to your contacts' information, just like you would add any other information (such as phone number, email address, physical address, etc). Once you enter a KeyTone address into your contact(s), KeyTone will automatically find those contacts.
Can I call people who do not have KeyTone?
No, not through the KeyTone app directly. At this time, for KeyTone to make a secure call or instant message, the recipient must also have KeyTone. You may make a regular call through your cellular provider. Please remember that standard calling charges will apply for regular calls.
What technology does KeyTone use?
KeyTone uses VoIP technology to send/receive calls and instant messages. Other standard protocols are used to initiate a session, secure the communications, and communicate with servers, such as TLS, SDES, SRTP, and DTLS. For more information, see the Features section or email us at Support@keytone.net with any questions.
How does KeyTone secure calls and instant messages?
KeyTone takes advantage of industry standard protocols and proven network infrastructure architectures to provide encrypted voice and instant messages between users on mobile devices over a data network. KeyTone uses robust & proven cryptography, such as Suite B algorithms, to encrypt calls and instant messages.
Do customers need to have their own servers or communications equipment?
No. KeyTone users can enjoy free access to Mocana's SIP Service & Communications infrastructure - enabling you to send and receive secure calls and instant messaging for FREE. Just activate your KeyTone account upon initial launch of the app or contact us at Support@keytone.net. If you wish to use your own setup, please contact us at Support@keytone.net.
Does KeyTone have any advertisements or sell my information?
No! We do not push any advertisements to the app or your email. We will NEVER sell your information or use your contact details for any other reason than to contact you about important information related to KeyTone or other Mocana Products.
Can I invite friends and family to use KeyTone?
Yes, please do so! You can share information about KeyTone through our "Share" tab on the left side of this page.
Can I license KeyTone for commercial use or purchase in volume?
Yes. Please refer to this perpetual pricing spreadsheet for Mocana KeyTone Pro. For subscription pricing or for further information, please contact sales@mocana.com.