NIST SP 1800-35 provides practical implementation guidance for zero trust in hybrid environments, building on the foundational model in NIST SP 800-207. This guidance helps mainframe operators apply resource-level authorization and identity checks to regulated workloads. The article notes that 53% of organizations expressed concern about mainframe security in a 2025 survey. Implementation challenges include monitoring gaps, scarce skills, and limited adoption of quantum-safe cryptography. Security modernization is being constrained by these factors, with only 7% of organizations having adopted quantum-safe cryptography.
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