NTT DoCoMo and Transatel launched a new secure connectivity service aimed at helping enterprises protect globally deployed IoT devices without relying on traditional VPNs or security software installed on endpoints.

The Cellular SASE for IoT service combines Transatel’s global mobile virtual network operator (MVNO) connectivity platform with Zscaler’s zero-trust security architecture to power a secure access service edge (SASE) offering. The companies said the offering is designed to address a growing challenge for enterprises deploying connected devices at scale and is the first carrier-delivered service of its kind in Japan.

Many IoT devices have limited computing resources, making it difficult to run conventional security software for functions such as threat detection, access control and vulnerability management. At the same time, organizations increasingly need to manage fleets of devices spread across multiple countries and mobile networks.

Rather than requiring software agents on individual devices, the new service uses the SIM connection itself as the foundation for both connectivity and security. Traffic is routed through Zscaler’s cloud-based security platform, where access controls, threat prevention and internet security policies can be enforced before communications reach enterprise applications or cloud resources.

The offering combines three components. Transatel provides global cellular connectivity through its MVNO platform, which supports deployments in more than 200 countries and territories and includes centralized SIM management capabilities. Zscaler contributes its Zero Trust Exchange platform, delivering functions such as firewall protection, URL filtering, intrusion prevention, and secure private application access. NTT DoCoMo serves as the systems integrator and managed services provider, offering deployment assistance and ongoing operational support.

The companies said the service also supports multicarrier connectivity without requiring customers to negotiate separate contracts in each country, potentially simplifying global IoT deployments and improving resiliency.

While SASE platforms have traditionally focused on securing enterprise users and branch locations, vendors are increasingly adapting those architectures for connected devices, industrial systems, and machine-to-machine communications.

“By combining trusted mobile connectivity with zero trust security, this solution will enable customers to scale deployments under consistent policies, reduce their attack surface, and simplify day-to-day operations,” Nathan Howe, VP of emerging technologies at Zscaler noted.