Tectia SSH Server for IBM z/OS is a secure file transfer and encrypted communications server designed specifically for IBM mainframe environments running the z/OS operating system. The product is part of SSH Communications Security's Tectia product line, which provides SSH-based secure connectivity and file transfer capabilities. It is positioned within the "Secure File Transfer & Encryption" category alongside the standard Tectia SSH Client/Server offering, indicating it shares core SSH protocol functionality adapted for mainframe-specific requirements. The z/OS edition is tailored to address the security and compliance needs of organizations operating IBM mainframe infrastructure, enabling encrypted data transfer and secure shell access within and across mainframe environments. It supports organizations in meeting audit and compliance requirements related to data in transit on mainframe platforms. The product is listed alongside other SSH Communications Security offerings such as PrivX PAM, Universal SSH Key Manager, and NQX quantum-safe encryption, suggesting it fits into a broader enterprise security ecosystem for managing secure access and file transfers.