
SB · Zero trust · A checklist
Nine plain steps, in order, from the accounts and devices you have to the backups you have tested, and the move to managed cloud services.
The first steps of the maturity model are mostly basics a small firm can do now.
Nine steps, in order, for a business owner and whoever looks after the computers, who may be an outside provider. Each is a plain action, with the CISA goal it comes from, CISA’s own ratings for that goal, and the stage of CISA’s maturity model it moves. Zero trust is not something you buy: in this site’s reading, the first stages of the maturity model are mostly these basics.
Each goal in CISA’s Cross-Sector Cybersecurity Performance Goals, version 2.0, has three ratings. CISA says these ratings apply mainly to IT infrastructure, not to operational technology or other non-IT systems. The ratings are CISA’s, one set per goal; they are not a quote for your business.
In order, the way the first ones help the later ones. Tick a step when it is done and your profile updates: the line below shows it as you go, and the full profile is beside the steps on a wide screen and after them on a phone. Your ticks stay in this browser; nothing is sent anywhere.
0 of 9 ticked · Identity: Traditional · Devices: Traditional · Applications and Workloads: Traditional · Data: Traditional · Visibility and Analytics: Traditional
Write down every device, system and software account that touches company data, and who uses each one. Keep the list current as people and tools come and go.
CPG 2.0 goal 2.A · Manage organizational assets (CISA, page 15)
CISA says these ratings apply mainly to IT infrastructure, not to operational technology or other non-IT systems.
Moves Devices · Asset & Supply Chain Risk Management: Traditional → Initial
Matches CISA’s cell in part. CISA’s Initial cell also asks for supply chain risk to be managed through policies and baselines; a list of what you have is the first half.
All physical assets and some virtual ones are tracked, and supply chain risk is managed through policies and control baselines drawn from federal recommendations. (Zero Trust Maturity Model, Table 3, page 17; paraphrased, and CISA’s wording says “agency”.)
Turn on multi-factor sign-in for every account that offers it, starting with administrators and email. Where a service supports passkeys or hardware security keys, use those: they are the only widely available kind that a fake sign-in page cannot relay. Where it does not, use an authenticator app, ideally with number matching, and keep text-message codes as the last resort.
Why passkeys and security keys: the phishing-resistant MFA tutorial →
CPG 2.0 goal 3.F · Implement multifactor authentication (MFA) (CISA, page 20)
CISA says these ratings apply mainly to IT infrastructure, not to operational technology or other non-IT systems.
Moves Identity · Authentication: Traditional → Initial, and starts toward Advanced
Matches CISA’s cell in part. CISA’s Traditional cell already allows MFA; its Initial cell adds checking more than one attribute (such as location or activity), and its Advanced cell is phishing-resistant MFA, which this step reaches only where a service supports it.
Identity is checked with multi-factor authentication (a password may be one factor), and more than one attribute of the person or thing, such as where they are or what they are doing, is validated. (Zero Trust Maturity Model, Table 2, page 13; paraphrased, and CISA’s wording says “agency”.)
Give anyone who administers systems a separate account for that work, and take administrator rights off everyday laptops, so that one bad download cannot install itself.
CPG 2.0 goal 3.G · Administrators maintain separate user and privileged accounts (CISA, page 21)
CISA says these ratings apply mainly to IT infrastructure, not to operational technology or other non-IT systems.
Moves Identity · Access Management: Traditional → Initial
Matches CISA’s cell in part. CISA’s Initial cell is access that expires and is reviewed automatically; taking everyday accounts off administrator rights is the first move away from permanent privileged access.
Access, including privileged-access requests, that expires and is reviewed automatically. (Zero Trust Maturity Model, Table 2, page 14; paraphrased, and CISA’s wording says “agency”.)
Use one identity provider so people sign in once to the business apps, and keep a set routine for switching a person off everywhere when they leave.
CPG 2.0 goal 3.D · Revoke credentials for departing staff (CISA, page 19)
CISA’s goal 3.D is the leaving routine. Single sign-on comes from the maturity model’s cell, which names it.
CISA says these ratings apply mainly to IT infrastructure, not to operational technology or other non-IT systems.
Moves Identity · Identity Stores: Traditional → Initial
Matches CISA’s cell in part. CISA’s Initial cell is a mix of stores with minimal integration, with single sign-on as its example; one provider for every business app is nearer its Advanced cell, which begins to consolidate stores.
A mix of self-managed and hosted (cloud or other) identity stores with minimal integration between them; the cell gives single sign-on as its example. (Zero Trust Maturity Model, Table 2, page 14; paraphrased, and CISA’s wording says “agency”.)
Switch on automatic updates and disk encryption for every laptop and phone, keep them managed so you can see their state, and let only managed devices reach the sensitive apps.
CPG 2.0 goal 2.B · Mitigate known vulnerabilities (CISA, page 15)
CPG 2.0 goal 3.R · Prohibit connection of unauthorized devices (CISA, page 26)
CISA’s goal 3.R is about keeping unauthorised media and hardware, such as USB drives, off your systems. Letting only managed devices reach sensitive apps is this site’s reading, from the maturity model’s Resource Access row.
CISA says these ratings apply mainly to IT infrastructure, not to operational technology or other non-IT systems.
Moves Devices · Policy Enforcement & Compliance Monitoring: Traditional → Initial
Matches CISA’s cell closely.
Devices report their own characteristics, with limited enforcement; a basic process approves software and pushes updates and configuration changes to devices. (Zero Trust Maturity Model, Table 3, page 17; paraphrased, and CISA’s wording says “agency”.)
Moves Devices · Resource Access: Traditional → Initial
Matches CISA’s cell closely.
Some devices are required to report their characteristics, and that information is used to approve access to resources. (Zero Trust Maturity Model, Table 3, page 17; paraphrased, and CISA’s wording says “agency”.)
Give each person only the access their job needs, and review who can reach what every quarter, taking away what is no longer needed.
CPG 2.0 goal 3.H · Implement the principles of least privilege (CISA, page 21)
CISA says these ratings apply mainly to IT infrastructure, not to operational technology or other non-IT systems.
Moves Identity · Access Management: Traditional → Initial, and starts toward Advanced
Matches CISA’s cell in part. Giving each person only what the job needs points at CISA’s Advanced cell (need-based access), but that cell is also session-based, and a quarterly review is not automated.
Access, including privileged-access requests, that expires and is reviewed automatically. (Zero Trust Maturity Model, Table 2, page 14; paraphrased, and CISA’s wording says “agency”.)
Keep the logs of sign-ins and administrator actions somewhere an attacker cannot edit them, and have a named person who looks at them.
CPG 2.0 goal 3.Q · Maintain log collection and storage (CISA, page 26)
CISA’s small-business page does not mention logs. This step comes from the performance goal alone.
CISA says these ratings apply mainly to IT infrastructure, not to operational technology or other non-IT systems.
Moves Visibility and Analytics (cross-cutting) · Visibility and Analytics: Traditional → Initial
Matches CISA’s cell in part. CISA’s Initial cell asks for automated collection and analysis of logs and for regularly assessing gaps in visibility; keeping logs where they cannot be edited, and looking at them, is the start of that.
Collection and analysis of logs and events begin to be automated for mission-critical functions, and the processes are regularly checked for gaps in visibility. (Zero Trust Maturity Model, Table 7, page 29; paraphrased, and CISA’s wording says “agency”.)
Back up what the business cannot run without, keep a copy offsite and offline, and practise restoring it, a part and then the whole, before you need to.
CPG 2.0 goal 3.O · Maintain system backups and restoration ability (CISA, page 25)
CISA says these ratings apply mainly to IT infrastructure, not to operational technology or other non-IT systems.
Moves Data · Data Availability: Traditional → Initial
Matches CISA’s cell in part. CISA’s Initial cell is about off-site backups and some data served from redundant, highly available stores; testing a restore comes from CISA’s backup goal and its small-business page, not from the cell.
Some data is served from redundant, highly available stores (cloud is the example), and off-site backups are kept for data held on the premises. (Zero Trust Maturity Model, Table 6, page 27; paraphrased, and CISA’s wording says “agency”.)
If you still run your own mail or file server in the office, move them to a managed cloud service. CISA treats this as a bigger change than the rest, for the highest security posture, because few small businesses can keep such servers patched and watched.
No CPG 2.0 goal: this comes from CISA’s small-business page, under achieving the highest security posture, so there are no ratings to show.
Moves Applications and Workloads · Accessible Applications: Traditional → Initial
Matches CISA’s cell in part. CISA’s Initial cell is applications reachable over public networks by authorised users through brokered connections; moving mail and files to managed cloud services is this site’s reading of that.
Some mission-critical applications are reachable over open public networks by authorised users with a need, through brokered connections. (Zero Trust Maturity Model, Table 5, page 24; paraphrased, and CISA’s wording says “agency”.)
CISA’s small-business page splits the work across three people. In a very small firm one person may wear two hats, and the IT lead may be an outside provider.
Owns the culture; security is not left to IT alone.
CISA, Cyber Guidance for Small Businesses: Role of the CEO
Drives the program and reports on it; does not need to be a security expert.
CISA, Cyber Guidance for Small Businesses: Role of the Security Program Manager (and, under the CEO’s tasks, the monthly report)
Makes the technical changes, and checks that they stuck. May be an outside provider.
CISA, Cyber Guidance for Small Businesses: Role for the IT Lead
CISA, Cyber Guidance for Small Businesses: The Security Program Manager’s tasks: review the incident response plan quarterly and after every incident or near miss; host quarterly tabletop exercises; report at least monthly
The ratings on each card are CISA’s, not this site’s, and there is one set per goal. Cost is a share of an organisation’s annual security budget, Impact is how serious the harm the goal prevents would be, and Ease is how much time and expertise the goal takes. CISA says they apply mainly to IT systems. They are not a quote for your business, and this page gives no prices: CISA gives none.
The profile is this site’s own device for seeing where the steps land. CISA’s Zero Trust Maturity Model puts each function of each pillar on one of four stages, Traditional, Initial, Advanced and Optimal, and says each pillar can progress at its own pace. Its tables give a stage for each function, not a score, so this page makes no score either. Each pillar shows the lowest stage among the functions these nine steps touch in it, so a pillar is never shown further along than its weakest part. That rule is this site’s choice. A step moves a function to the stage on its card, and several steps can touch one function; a pillar none of the steps touches shows nothing.
The maturity model is written for federal agencies, so its cells say “agency”; the cards paraphrase them for a business. Some steps match a cell closely and some only in part, and the card says which and what is missing. Treat the ticks as a way to see what a step is for, not as a rating of your security: CISA is plain that following its advice is no guarantee you will never have an incident.
What is left out is deliberate. There are no breach statistics, no small-business attack rates and no dollar figures here, because none had a primary source that could be opened. There are no product names either: the steps are described by category, so that nothing on this page is an endorsement.
CISA Cross-Sector Cybersecurity Performance Goals 2.0 Cross-Sector Cybersecurity Performance Goals, Version 2.0 (CISA). Read: the Cost, Impact and Ease definitions (pages 10 and 11) and goals 2.A, 2.B, 3.D, 3.F, 3.G, 3.H, 3.O, 3.Q and 3.R with their ratings. CISA says the ratings apply mainly to IT, not OT. Dec 2025; read 2026-10-23, against the page layout (pages are the document’s printed numbers).
CISA Zero Trust Maturity Model Zero Trust Maturity Model, Version 2.0. Apr 2023 (the cover date); read 2026-10-22; Tables 2, 3, 5, 6 and 7 read again 2026-10-23 for the small-business page.
CISA, Cyber Guidance for Small Businesses Cyber Guidance for Small Businesses (CISA). Read in full: the CEO, security program manager and IT lead actions, the quarterly review and tabletop exercise, the “highest security posture” section on on-premises services. It does not mention zero trust or logging. page updated Apr 2024; read 2026-10-23.
CISA, Implementing Phishing-Resistant MFA Implementing Phishing-Resistant MFA (fact sheet). Oct 2022; read 2026-10-22; read again 2026-10-23.
Everything here is paraphrased from the sources, not quoted at length, and every claim is attributed to one. The NSA’s own zero trust sheets could not be opened, so they are not cited; the CISA alert about them is. Anything illustrative is labelled as such. Where a source is silent or could not be read, the page leaves the fact out.
Most of these steps need someone who knows your systems. I help small businesses with the same list: taking stock of devices and accounts, setting up sign-in protections and single sign-on, managing laptops and phones, backups with restore tests, and the quarterly routine.
Tell me what you have, and I’ll tell you which of these steps I’d start with.