Roadmaps Security roadmaps Information security and data protection

Data Security

Find sensitive data, control who can reach it, protect it with encryption and masking, and stop it leaving where it should not.

Estimated time: 15–26 months · At about 10 hours a week.

Learning path

Click a topic to see what to learn and where. Mark topics as you go; your progress is saved in this browser only.

  • Core topic
  • Optional
  1. Beginner · 2–3 months Knowing and classifying data
  2. Intermediate · 3–5 months Encryption, DLP and database security
  3. Advanced · 4–6 months Data security at scale
  4. Expert · 6–12 months Strategy and leadership

All topics in detail

BeginnerTime: 2–3 months

Knowing and classifying data

Skills

  • Build a simple, usable classification scheme.
  • Discover sensitive data across systems.
  • Design least-privilege access to data.

Hands-on projects and labs

  • Use Presidio to find personal data in a sample dataset and classify what you find.
  • Set up labels and a simple policy in a Microsoft Purview trial.

Done when you can…

  • Explain the data lifecycle and the risks at each stage.
  • Produce a map of where an organisation's sensitive data lives.

Beginner

The data lifecycle

Data is created, stored, used, shared, archived and destroyed. Each stage has its own risks and controls. Map it before you protect it.

Resources

Beginner

Data classification

Label data by sensitivity so controls can follow it. Keep the scheme simple: too many levels and nobody uses it correctly.

Resources

Beginner

Data discovery

Find where sensitive data actually lives, including the copies in test systems, spreadsheets and old shares. You cannot protect what you cannot find.

Resources

Beginner

Access control for data

Grant access by role and need, review it regularly, and prefer short-lived access to standing permissions. Over-broad access is the root of most data loss.

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Beginner

Protecting data at rest, in transit and in use

Encrypt stored data, protect it as it moves, and learn the newer options for protecting it while it is being processed.

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Beginner

Data minimisation

The safest data is the data you never collected or already deleted. Keep only what you need, for only as long as you need it.

Resources

IntermediateTime: 3–5 months

Encryption, DLP and database security

Skills

  • Encrypt data and manage keys properly.
  • Mask and tokenise data for non-production use.
  • Deploy and tune DLP.
  • Secure and monitor databases.

Hands-on projects and labs

  • Set up column encryption and auditing on a lab database and test access controls.
  • Create a DLP rule in a Microsoft 365 trial and test it without blocking normal work.
  • Mask a production-like dataset so it is safe to use in testing.

Done when you can…

  • Show sensitive data encrypted, access-controlled and monitored in a database.
  • Demonstrate DLP catching a real leak and allowing normal use.

Intermediate

Encryption in practice

Choose algorithms and modes, encrypt databases and storage, and above all manage the keys well. Bad key handling undoes good encryption.

Resources

Intermediate

Masking and tokenisation

Hide real values in test systems and analytics by masking them or swapping them for tokens, so sensitive data is not copied everywhere.

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Intermediate

Data loss prevention

DLP watches email, web, endpoints and cloud for sensitive data leaving, and blocks or alerts. Tune it carefully or it drowns everyone in false positives.

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Intermediate

Database security

Harden databases, control access, encrypt sensitive columns, and turn on auditing. Databases are where the most valuable data sits.

Resources

Intermediate

Database activity monitoring

Watch for unusual queries, bulk exports and access outside normal patterns. This catches both attackers and insider misuse.

Resources

AdvancedTime: 4–6 months

Data security at scale

Skills

  • Use DSPM to find and reduce data exposure.
  • Secure data across cloud stores and data lakes.
  • Run enterprise key management.
  • Reduce insider data risk.

Hands-on projects and labs

  • Find and fix an over-exposed cloud storage bucket in a lab account.
  • Set up customer-managed keys for a cloud data store and audit their use.

Done when you can…

  • Show reduced data exposure across a cloud environment, with evidence.
  • Explain how your controls would catch a bulk data theft.

Advanced

Data security posture management

DSPM continuously finds sensitive data across cloud and on-premises, maps who can reach it, and flags risky exposure. It is how data security scales.

Resources

Advanced

Cloud data security

Object storage, data lakes and managed databases each have their own access and encryption controls. Misconfigured buckets are a classic breach.

Resources

Advanced

Enterprise key management

Use a key management service or HSM, separate duties, rotate keys and keep an audit trail. Consider customer-managed keys in the cloud.

Resources

  • AWS KMS DocsFreeAmazon Web Services

AdvancedOptional

Protecting data in use

Confidential computing and techniques such as homomorphic encryption protect data even while it is processed. Know what is practical today.

Resources

Advanced

Insider data risk

Much data loss is by insiders, by mistake or on purpose. Combine monitoring, least privilege and a fair investigation process.

Resources

Advanced

Secure data sharing

Sharing data with partners and analysts safely needs access controls, logging and sometimes privacy techniques. Plan it instead of emailing spreadsheets.

Resources

ExpertTime: 6–12 months

Strategy and leadership

Skills

  • Set data security strategy and controls.
  • Align data security with data governance.

Hands-on projects and labs

  • Write a data security standard with classification levels and controls.
  • Design a DSPM-based programme to cut data exposure over a year.

Done when you can…

  • Run a data security programme with measured exposure reduction.
  • Lead a major data protection rollout, such as classification or DLP.

Expert

Data security strategy

Set the classification scheme, the controls per level and the balance with usability, across the whole organisation.

Resources

Expert

Working with data governance

Data security works best alongside data governance: ownership, quality and lifecycle. Align with the teams that own the data.

Resources

Expert

Measuring data security

Track classified coverage, exposed sensitive data, DLP incidents and encryption coverage. Report risk reduced, not tool output.

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Overview

Data security protects the information itself, wherever it lives: in databases, files, cloud storage and backups. It starts with knowing what data you hold and how sensitive it is, then controlling access, protecting it with encryption and masking, and watching for it leaving the organisation.

The work spans classification and discovery, database and storage security, encryption and key handling, and data loss prevention. It overlaps with privacy and cloud security, and it is central to meeting regulations about personal and financial data.

Why it matters

Data is what attackers are usually after and what regulators protect. Breaches are measured in records lost. Organisations need people who can protect data across sprawling systems without blocking the business.

Typical job roles

  • EntryData security analyst Runs classification and DLP tooling and handles alerts.
  • Mid-levelData security engineer Builds classification, encryption and DLP controls.
  • Mid-levelDatabase security engineer Secures and monitors databases and data stores.
  • SeniorData protection architect Designs data security across the organisation.
  • LeadHead of data security Owns data protection strategy and controls.

Prerequisites

  • How databases and file storage work.
  • Cryptography basics: encryption, hashing and keys.
  • Cloud storage basics.
  • An idea of the regulations that apply to your data.

Cybersecurity Data analysis and engineering

Tools and technologies

  • Microsoft Purview Commercial Classification, DLP and DSPM with strong documentation.
  • Presidio Open source Find and redact personal data in text and images.
  • HashiCorp Vault Free community edition Secrets and encryption as a service.
  • Apache Ranger Open source Fine-grained access control and auditing for data platforms.
  • SQLMap (for defenders) Open source Understand database injection to defend against it, in your own lab.

Certifications

Take them in roughly this order. Costs and details for the ones marked with a link are on the Certifications page.

  1. Entry Security+ CompTIAA common baseline.Cost and exam details
  2. Intermediate CompTIA DataSys+ CompTIADatabase administration and security.
  3. Advanced CISSP ISC2Covers data security in its domains.Cost and exam details

Resources

Frameworks and standards

All frameworks and standards

Career path

A common progression. Titles vary between companies.

  1. Database or cloud administrator, or security analyst0–2 years
  2. Data security analyst1–3 years
  3. Data security engineer3–6 years
  4. Data protection architect6–9 years
  5. Head of data security10+ years

Related domains to move into

All security roadmaps Back to top

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