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Security and Encryption

CounterPath desktop and mobile softphones feature the highest levels of security

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Inside Security and Encryption


Organizations are taking precautions to defend against attacks on their voice, video, messaging, and data communications. CounterPath establishes secure signaling and encrypted media between its desktop and mobile clients and your IP PBX, Media Gateway or UC platform.

We support Transport Layer Security (TLS) to provide an encrypted connection between your UC platform and CounterPath softphone, while Secure RTP (SRTP) encrypts the media streams. We can also communicate within secure transports via VPN, TCS.

CounterPath has worked extensively with Session Border Controller manufacturers, including Oracle, to ensure security extends through the network. CounterPath offers the Oracle Tunneled Service Controller (TSC) Feature Pack which leverages the ability to effectively tunnel SIP signaling and media.

These security measures greatly reduce the threat of "man in the middle" attacks that can include wiretapping, eavesdropping, or threats to the security and privacy of your softphone application.

In addition, within the provisioning and management processes, our Stretto server uses Secure LDAP (SLDAP) to interact with other servers within the Enterprise or Organization.

User Benefits

  • Maintain high quality voice and messaging so the user experience does not suffer during encryption
  • Protect privacy of users’ communications

Enterprise/Organization Benefits

  • Reduce threats to sensitive communications and information from various forms of attacks.
  • Secure multiple points against potential attacks on the organization.


Transport Layer Security (TLS)

Transport Layer Security (TLS) is a cryptographic protocol that encrypts the segments of network connections at the Application Layer for the Transport Layer, using asymmetric cryptography for key exchange, symmetric encryption for confidentiality, and message authentication codes for message integrity. By using TLS to encrypt SIP signaling, parameters such as phone numbers and user names sent between your UC platform and CounterPath softphone application cannot be captured. TLS also helps prevent third parties from eavesdropping or tampering with XMPP and SIP/Simple messages.

Secure Real-time Transport Protocol (SRTP)

Secure Real-time Transport Protocol (SRTP) defines a profile of RTP (Real-time Transport Protocol), SRTP provides encryption, message authentication and integrity, and replay protection to the RTP data in both unicast and multicast applications. In essence, SRTP secures your conversations by encrypting audio and video media traffic – and even if unauthorized users were able to intercept and capture your audio packets, they would be unable to recognize it as speech.

Oracle Tunneled Service Controller (TSC)

Oracle Communications Global Business Unit (CGBU) and CounterPath collaborated to deliver functionality that is critical to effective Enterprise OTT communications. CounterPath’s Oracle TSC Feature Pack provides features that leverage functionality in Oracle’s Session Border Controllers. These include: efficiently terminate and control tunnels before passing secure traffic into the core network; Leveraging 256-bit encrypted TLS or DTLS tunnels to ensure privacy; Providing reliable high-quality voice QoS and QoE; and enabling Voice Call Continuity between circuit switched and packet-switched networks.

For more information on the security and encryption on CounterPath's softphones and server applications use, please contact us.


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