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CS5 is Tatva's operating model for cyber defense. Five stages - Assess, Protect, Detect, Respond, Comply - aligned one-to-one with the NIST CSF and delivered end-to-end by OSCP, CISSP and GCIH certified engineers. Every engagement runs the same lifecycle, so you get predictable outcomes, audit-ready evidence and a clear roadmap from day one.
THE CS5 FRAMEWORK
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Each stage produces measurable outcomes and hands off cleanly to the next - so posture improves cycle over cycle.
01 RISK, MATURITY AND ATTACK-SURFACE ASSESSMENT WITH A PRIORITISED ROADMAP. Assess • External and internal attack-surface mapping • Framework maturity scoring against NIST CSF, ISO 27001 and CIS 8 • Board-ready remediation roadmap with 30/60/90-day priorities EXPLORE ASSESS
02 HARDEN IDENTITY, NETWORK, ENDPOINT AND CLOUD AGAINST KNOWN ATTACK PATHS. Protect • Zero Trust segmentation, MFA and least-privilege identity design • Firewall, SD-WAN, NAC and endpoint hardening to CIS benchmarks • Cloud-workload protection, secrets hygiene and configuration baselines EXPLORE PROTECT
Related:
Zero Trust Rollout
03 24/7 SOC MONITORING, HUNTING AND SIEM CORRELATION ACROSS ALL TELEMETRY. Detect • 24x7 monitoring with sub-15-minute analyst triage • SIEM engineering, detection-as-code and MITRE ATT&CK coverage mapping • Threat hunting, UEBA and enrichment from open and commercial intel EXPLORE DETECT
Related:
SIEM Engineering
04 SUB-15-MINUTE TRIAGE, SOAR CONTAINMENT AND FORENSIC-GRADE DFIR. Respond • SOAR playbooks for isolation, credential reset and blast-radius control • Digital forensics with court-grade chain of custody • Post-incident hardening, tabletop rehearsal and lessons learned EXPLORE RESPOND
05 ISO 27001, RBI, SEBI CSCRF, SOC 2 AND DPDP EVIDENCE, AUDIT-READY. Comply • Control mapping to ISO 27001, SOC 2, RBI, SEBI CSCRF and DPDP • Continuous evidence collection with automated control monitoring • Audit-ready artefacts, gap remediation and certification support EXPLORE COMPLY
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FRAMEWORK MAPPING
CS5 aligns one-to-one with NIST CSF functions. The Comply stage maps to the Govern function introduced in CSF 2.0 and adds regulator-specific evidence for RBI, SEBI CSCRF, DPDP, ISO 27001 and SOC 2.
CS5 stage
NIST CSF function
Representative activities
Assess
Asset discovery, risk assessment, roadmap
Identity, network, endpoint, cloud hardening
SOC monitoring, SIEM engineering, hunting
Respond
Respond + Recover
SOAR containment, DFIR, restoration, lessons
Comply
Govern (CSF 2.0)
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Evidence, audit readiness, board reporting
CS5 is an operating model, not a replacement framework. It aligns one-to-one with the NIST Cybersecurity Framework functions and adds a fifth stage - Comply - that folds Govern-style evidence, audit readiness and regulatory mapping (ISO 27001, RBI, SEBI CSCRF, SOC 2, DPDP) into the same lifecycle a Tatva engagement runs day-to-day.
Every CS5 engagement is led by certified engineers - typically OSCP for offensive assessments, CISSP for architecture and governance, and GCIH for incident response. A named lead consultant owns the roadmap end-to-end and is supported by our 24x7 SOC for the Detect and Respond stages.
Yes. Most organisations start with Assess to build a prioritised roadmap, then layer in Detect (Managed SOC) or Comply (audit acceleration) based on the highest-value gap. The stages are designed to compound: Protect controls generate Detect telemetry, and Respond findings feed the next Assess cycle.
A first-pass Assess completes in 2-4 weeks. Protect hardening runs in 8-12 week sprints alongside a live SOC onboarding (Detect) that reaches full coverage in 6-8 weeks. Comply activities are continuous once the baseline is in place, with the first audit-ready milestone usually inside 90-120 days.
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BOOK A FREE SECURITY ASSESSMENT
A 45-minute session with a Tatva engineer. We map your current posture to CS5, share a prioritised roadmap, and identify the two or three moves that will materially reduce risk in the next 90 days.
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