Ribbon Secure Telephone Identity

Robocalling is on the rise and every single one of us feels thenegative impacts of this problem. An important pre-condition
to properly classifying robocalls is trust in the proffered calling identity. This is problematic as some robocalls may bespoofed calls wherein the call is made with a calling numberthat is not real/legitimate – it could be an unassigned number,
another entity’s inbound-only number, or another subscriber’snumber, to make it seem like it is coming from a legitimate
source. This leads to more subscribers picking up the phone
as it seems to come from a real source. There is a need tomitigate spoofed calls – irrespective of the fact that they may
be harmless or harmful – because the mere act of spoofing
the calling identity implies an intent to deceive.
By implementing the FCC/CRTC mandated STIR/SHAKEN
framework and ARCEP mandated MAN program, it will be possible to significantly reduce the negative effect that spoofed
calls have on subscribers and increase the chances of subscribers answering the calls.
STIR (Secure Telephony Identity Revisited) is the protocol
standardized by Internet Engineering Task Force (IETF) anddefines a signature to verify the calling number and specifies
how it will be transported in SIP “on the wire”. And SHAKEN(Signature-based Handling of Asserted information usingtoKENs) is the framework developed by Alliance for Telecommunications Industry Solutions (ATIS) to provide a STIR implementation profile for service providers.
Ribbon Secure Telephone Identity (STI) is a STIR/SHAKEN
standards-compliant solution that enables service providers
to authenticate the veracity of a calling line identity originatingfrom their network or verifying the calling line identity of calls
terminating to their network.
Ribbon STI is qualified to be inter-operable with STI-AS/VS
from other vendors and is certified by the U.S. STI-PA (iconectiv) as an approved STI-AS/VS vendor.
For Service Providers in France, Ribbon STI also supports
the adaptation of the STIR/SHAKEN model referred to as theNumber Authentication Mechanism (MAN) program.

Data Sheet

Ribbon STI Components
Ribbon STI includes the following components:•••••

Secure Telephone Identity – Authentication Server (STI-AS)
Secure Telephone Identity – Verification Server (STI-VS)
Service Provider – Key Management Service (SP-KMS)
Secure Key Store (SKS)
Secure Telephone Identity - Certificate Repository (STI-CR)

In France, the Public Database of Operator Certificates (BPCO)
component of the MAN platform stores all STI public-key
certificates signed by the certification authority (GCO) andmakes them publicly accessible to STI Verification Services.
So STI-CR component is not applicable for STI deployments inFrance.
Ribbon STI exposes ATIS 1000082-compliant HTTPS interface
to VoIP and IMS network elements for authentication, signingand verification of calls. Ribbon STI can also be integrated with
Ribbon’s centralized policy and routing solution (PSX) to proxy
SIP requests to HTTPS request for network elements that are
unable to invoke ATIS 1000082-compliant HTTPS messages.
Deploy STI with PSX for Call Validation Treatment (CVT) andconfigurable selection of: calls to be signed; Call Attestation
Rules; and OrigID Values.
Ribbon STI is horizontally scalable, fully virtualized andcloud-native containerized solution with an active-active georedundant architecture, that can be deployed on any industrystandard server using KVM, VMware, or RHV.

Minimum Resource Requirements• Application- Number of VMs: 2- vCPU for each VM: 4- vMemory for each VM: 16G- vHDD for each VM: 80G- vNIC for each VM: 1 (recommended 3)

Ribbon Secure Telephone Identity

Minimum Resource Requirements (continued)

Compliance• Database- Number of VMs: 3- vCPU for each VM: 2- vMemory for each VM: 8G- vHDD for each VM: 500G
- vNIC for each VM: 1 (recommended 2)• IETF STIR standards- RFC 8224
- RFC 8225
- RFC 8226
- RFC 8443
- RFC 8588

Supported Protocols• REST• ATIS SHAKEN standards- ATIS-1000074-E- ATIS-1000078- ATIS-1000080-E- ATIS-1000082- ATIS-1000084-E- ATIS-1000085 for “div” PASSporT support• 3GPP standards- 3GPP TS 24.229 (ISC and verstat)• MAN (France) Program Standards- MAN Mode operatoire Mecanisme de Confiance version
1.5.

Contact us to find out more about Ribbon Secure Telephone Identity

Copyright ©️ 2023, Ribbon Communications Operating Company, Inc. (“Ribbon”). All Rights Reserved. v0623

2 Data Sheet