Identity & Access Management Strategy for CISOs
IAM, PAM, MFA, SSO, ITDR — how identity is the new perimeter and the dominant blast-radius lever in modern security programs. Risk register, mitigating investments, scenarios in CISO Game.
Identity is the new perimeter. Credentials, federation, and device trust have replaced IP allowlists and VPNs as the primary control plane. Compromised credentials drive a majority of breaches according to Verizon DBIR cycle after cycle, and identity controls deliver outsized risk reduction relative to spend — phishing-resistant MFA reportedly blocks more than 99% of credential-based attacks. CISO Game weights identity heavily across the risk register because real-world reduction in blast radius from a mature IAM stack is enormous.
The identity stack — what each layer does
IDP + SSO rationalizes who logs in where; without it, every SaaS tenant is a separate breach surface. MFA (especially phishing-resistant: hardware keys, platform authenticators) raises the bar on credential reuse. PAM (Privileged Access Management) controls how break-glass and admin sessions are checked out, recorded, and revoked. ITDR (Identity Threat Detection & Response) watches for malicious behavior inside identity flows — token theft, OAuth abuse, MFA fatigue. Each layer addresses a different attack pattern; mature programs run all four.
Why identity decisions are board-visible
Real-world boards have learned to ask about identity specifically. SSO + MFA coverage percentages, privileged-account review cadence, dormant-account hygiene, and identity-provider concentration risk (R41) all show up in board decks because they're the controls that recover quickly post-incident. CISO Game's compliance audit events surface this — the tier-1 external auditor option pays off most when the identity layer is mature, and the Y3 strategic review (E046) gates outcomes on identity ≥ 55 specifically.
Related risks in CISO Game's register
The risks that drive this topic, with their dominant mitigation levers and severity:
- R03 Phishing / Credential TheftExternal · severity 7
- R08 Account TakeoverExternal · severity 7
- R09 Insider ThreatInsider · severity 8
- R10 Privilege AbuseInsider · severity 7
- R11 Lateral MovementInsider · severity 8
- R41 Identity Provider Outage / CompromiseOperational · severity 8
Investments that move this topic
Products, hires, and services in the catalog that primarily address identity and access:
Scenarios that stress this topic
Game scenarios where identity and access is the central program-shaping concern:
- Fintech IPO crunchTight budget, hawkish board, regulatory eye on you.
- Tuck-in acquisition closes Q1Your CEO just signed paperwork. You inherit a security debt.
How to test your identity and access strategy
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