With the average cost of a UK data breach now sitting at £3.29 million, and 43% of British businesses reporting a cybersecurity incident in the past year, data protection has never been more business-critical.
Yet one of the most common mistakes organisations make is treating data privacy and data security as the same thing. Understanding where one ends and the other begins is the first step towards building an IT strategy that genuinely protects your business.
What is data security?
Data security refers to the technical controls, tools, and processes an organisation puts in place to protect digital information from unauthorised access, theft, corruption, or loss. It’s about how data is protected, shielding it from both external threats (cybercriminals, ransomware, phishing attacks) and internal risks (accidental data exposure, rogue employees).
Common data security measures include:
- Encryption: Scrambling data so it can only be read by authorised parties
- Access controls and multi-factor authentication (MFA): Ensuring only the right people can reach sensitive systems
- Firewalls and intrusion detection systems: Blocking and alerting on suspicious network activity
- Data loss prevention (DLP) tools: Preventing sensitive information from leaving the organisation
- Incident response planning: Having a clear, tested process for responding to breaches
Data security is largely the domain of your IT and cybersecurity teams and serves to top threat actors, or human error, from compromising data.
The average cost of a data breach reached $4.88 million in 2024, a significant increase from previous years, according to industry reports. For most businesses, a single significant breach can be operationally and reputationally devastating.
What is data privacy?
Data privacy, on the other hand, is concerned not with how data is protected, but how data is used. It is a framework of policies, rights, and governance practices that govern how personal information is collected, processed, stored, shared, and ultimately disposed of.
Data privacy centres on the rights of individuals; your customers, employees, and partners, to understand and control what happens to their personal information. It holds you accountable to handling sensitive data lawfully, fairly, transparently, and in line with people’s consent.
Key elements of data privacy include:
- Consent management: Ensuring individuals have actively agreed to how their data will be used.
- Data minimisation: Only collecting the data that is genuinely necessary
- Purpose limitation: Not using data for any purpose beyond what was originally stated
- Subject access rights: Enabling individuals to access, correct, or delete their data
- Third-party management: Ensuring vendors and partners handle data in compliant ways
Data privacy is shaped by regulation. In the UK and Europe, the General Data Protection Regulation (GDPR), and its UK post-Brexit equivalent, the UK GDPR, sets the legal standard for how organisations must collect, process, store, and share personal data. From obtaining lawful consent to honouring individuals’ rights that apply to any organisation handling the personal data of UK or EU residents.
Non-compliance can incur regulatory fines of up to €20 million or 4% of global annual turnover, whichever is highest, making it one of the most significant legal frameworks your IT and data strategy must account for.
Data privacy vs data security: Key differences
While data privacy and data security are closely related, they differ in a few fundamental ways.
| Data security | Data privacy | |
| Focus | Protecting data from threats and breaches | Governing how personal data is used and shared |
| Who owns it | IT and cybersecurity teams | Legal, compliance, and data governance teams |
| Core tools | Firewalls, encryption, MFA, monitoring | Policies, consent frameworks, privacy notices |
| Driven by | Threat landscape and technical risk | Regulation, ethics, and individual rights |
One important principle is that security can exist without privacy, but privacy cannot exist without security. You can lock data behind sophisticated technical defences and still misuse it internally. On the flip side, if your data isn’t secured, no amount of privacy governance can protect the individuals whose information you hold.
How data security and data privacy work together
The most effective organisations treat data security and privacy as complementary disciplines that must be aligned to form a coherent data protection strategy.
A practical example of this would be your business collecting customer payment information; Data security ensures that information is encrypted in transit and at rest, access is restricted to authorised personnel, and systems are monitored for anomalies. Data privacy ensures that you’ve collected only the payment data you need, that customers have consented to how it’s used, that you’re not selling it to third parties without permission, and that you have a process for responding to subject access requests.
Both are essential, and neither are sufficient alone. This overlap is increasingly reflected in regulation. Laws like GDPR embed security requirements directly to protect personal data, linking the two disciplines in law as well as in practice.
Regulatory trends are moving even further in this direction. Legislators in the EU, US, and beyond are now considering data privacy and security policies specifically related to artificial intelligence, signaling that the intersection of these disciplines will only deepen as technology evolves.
Why knowing the difference matters
For IT leaders and business decision-makers, understanding the difference between data privacy and data security has real, practical implications.
- Different risks mean different mitigations
A data breach caused by a ransomware attack is a security failure. Sharing customer data with a marketing partner without proper consent is a privacy failure. Each requires a different response: technical remediation on one hand, governance and legal review on the other. Combining the two means you risk addressing the wrong problem.
- Compliance requires both
Most data protection regulations require organisations to demonstrate both strong security controls and sound privacy governance. You cannot achieve GDPR compliance, for example, by having great firewalls if your data handling practices are unclear or your consent mechanisms are flawed.
- Trust is built on both
Consumer trust has become a competitive differentiator. Research consistently shows that people want to know not only that their data is safe, but that it is being used responsibly. The reputational damage from a privacy scandal, even without a security breach, can be severe.
- Responsibility sits in separate places
Security is typically owned by your CISO and IT security team. Privacy tends to sit with your Data Protection Officer (DPO), Legal, or Compliance team. Without deliberate coordination, these teams can work in isolation, creating blind spots that put the organisation at risk.
How to act proactively
Data security and privacy are not interchangeable; security protects data from the outside world, and privacy governs how it’s used on the inside. Without both working in tandem, your organisation is exposed.
Businesses shouldn’t wait for a breach or regulatory audit to act. You should be treating privacy and security as strategic priorities that require mapping the data you hold, aligning your IT and compliance teams, embedding Privacy by Design into your processes, and ensuring your incident response plan covers both security breaches and GDPR obligations.
Take control of your data security and privacy with Mintivo
At Minitvo, we help businesses build IT strategies that are secure by design and compliant by default. Whether you’re looking to strengthen your security position or navigate GDPR obligations, our team is here to help.
Get in touch today to speak with one of our specialists and find out how we can protect what matters most to your business.
