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.
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.
Sharing data with partners and analysts safely needs access controls, logging and sometimes privacy techniques. Plan it instead of emailing spreadsheets.
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 analystRuns classification and DLP tooling and handles alerts.
Mid-levelData security engineerBuilds classification, encryption and DLP controls.
Mid-levelDatabase security engineerSecures and monitors databases and data stores.
SeniorData protection architectDesigns data security across the organisation.
LeadHead of data securityOwns 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.
NIST Cybersecurity Framework (CSF) 2.0A common way to describe and improve an organisation's security, organised as Govern, Identify, Protect, Detect, Respond and Recover.
CIS Critical Security ControlsA prioritised list of 18 practical defences, grouped so smaller organisations know what to do first.