What is data security and how to protect data

What is data security and how to protect data

Data security is a set of technical and organizational measures that protect data against unauthorized access, alteration, loss, or disclosure. Its foundation rests on three elements: confidentiality (data is accessible only to authorized persons), integrity (data stays accurate and unaltered without authorization), and availability (data is accessible when you need it). This trio, known as the CIA triad, is the basis of any serious approach to information protection.

In Slovenia and the EU, data security is governed by the GDPR and the domestic ZVOP-2 Act, with oversight carried out by the Information Commissioner and the Government Office for Information Security. For individuals and organizations alike, data protection isn't just a legal obligation - it's a condition for maintaining trust, reputation, and business stability.

Key elements of data security:

• Confidentiality: only authorized persons have access to the data
• Integrity: data must not be altered or deleted without authorization
• Availability: systems and data work when you need them
• Legal framework: GDPR, ZVOP-2, ZInfV-1
• Competent authorities: the Information Commissioner, the Government Office for Information Security, the Safer Internet Centre

How does data security differ from cybersecurity?

Cybersecurity is a broader field concerned with protecting networks, information systems, and digital services against attacks in cyberspace. Data security is a subset of it: it focuses exclusively on protecting data as a key asset, regardless of whether it's stored digitally, on paper, or in the cloud.

Information security covers the confidentiality, integrity, and availability of data in all its forms, while cybersecurity deals with preventing, detecting, and responding to incidents in the digital environment. In practice, the two fields overlap closely: an attack on a network is at the same time a threat to data, and a data security breach often reveals gaps in cyber protection.

Organizations that understand this distinction can allocate resources more effectively. Technical measures such as firewalls and antivirus protection fall under cybersecurity, while encryption, access control, and data retention policies address data security directly. Both sets of measures are necessary and complement each other.

Which laws and authorities govern data protection in Slovenia?

Slovenia has a well-developed legal framework for data protection, built on both European and domestic legislation.

The GDPR requires controllers and processors of data to adopt appropriate technical and organizational measures based on the risk of each specific processing activity. There's no one-size-fits-all recipe: every organization needs to assess its own risks and tailor its measures to its specific circumstances. ZVOP-2, in force since January 2023, supplements the GDPR with additional Slovenian requirements, particularly for processing sensitive data such as health or biometric data. Stricter requirements apply to these categories regarding storage location and security procedures.

ZInfV-1 introduces special requirements for essential and important entities operating in sectors such as energy, healthcare, or transport. Key authorities and resources:

• The Information Commissioner: the supervisory authority for personal data protection in Slovenia
• The Government Office for Information Security: responsible for national information and cybersecurity
• The Safer Internet Centre: awareness-raising and support for safe internet use
• GDPR, Article 32: requires a mandatory risk assessment for every processing activity
• ZVOP-2, Article 23: special requirements for high-risk information systems

Controllers need to maintain a record of processing activities, appoint a data protection officer where required by law, and prepare an internal personal data protection policy. A security breach must be reported to the Information Commissioner within 72 hours of discovery.

Expert tip: A risk assessment isn't a one-time task. The GDPR requires you to update it whenever there's a significant change to data processing or information systems.

What are the most common threats to data security?

Threats to data security are varied and constantly evolving. SI-CERT recorded 4,587 incidents in 2024, including a number of technologically sophisticated forms of attack. Attacks are no longer a rarity - they're a constant feature of the business environment.

The most common threats include:

• Phishing: fake emails that trick employees into revealing passwords or banking details; SI-CERT recorded a large number of fake website and phishing cases.
• Ransomware: an attack that locks files and demands a ransom to release them
• Social engineering: psychological manipulation used to gain access or confidential information
• Smishing: attacks carried out via SMS messages and malicious mobile apps, growing in frequency
• Identity attacks: unauthorized access to accounts and digital identities

Internal risks are just as serious. Employee negligence, weak passwords, and unintentional data sharing often cause more damage than external attacks. The consequences of breaches range from financial losses and GDPR fines to long-term damage to an organization's reputation. Measures that were adequate a few years ago are often no longer sufficient today, which makes proactively updating security policies essential.

How to protect data in practice, at home and at a company?

Effective data protection doesn't require expensive solutions. You can reduce most risks simply by consistently applying basic measures.

Backups are one of the simplest and most effective ways to prevent data loss. Store them in separate, secure locations, ideally following the 3-2-1 rule: three copies, on two different types of media, with one kept off-site. Regularly check that restoring from a backup actually works.

Passwords and multi-factor authentication are your first line of defense. Weak passwords are among the most common entry points for attacks, so use a unique password for every account and enable multi-factor authentication (MFA) wherever it's available. A password manager such as Bitwarden or KeePass makes this significantly easier.

Updating software closes known security holes. Regularly install updates for operating systems, applications, and security tools. Outdated software is a frequent target for attacks. You can read more about the importance of regular updates in the overview of security updates for 2026.

Access management based on the principle of least privilege means each user only accesses the data they absolutely need for their work. Regularly review and revoke access for former employees or external collaborators.

Encryption converts data into a form that's unreadable without the right key. Use it for storing sensitive files and for transmitting data over a network. HTTPS on websites is a minimum standard, not a luxury.

Employee training is an investment with one of the highest returns in security. Employees who can recognize a phishing message are worth more than many an expensive software solution.

Expert tip: Run short, regular security exercises, not just a one-off training session at onboarding. Phishing simulations offered by specialized providers show you where your team's actual weak points are.

For companies that manage websites, security measures at the server and application level are just as important. When developing web solutions, Moxy-web builds security into every phase of a project, from architecture to maintenance. You can find practical guidance on a secure business website in a separate guide.

Why is the human factor the biggest vulnerability, and how to reduce it?

Employees are the weakest link in information security. This shouldn't be read as a criticism, but as a starting point for action. Attackers know this, and they deliberately aim their methods, from phishing to social engineering, at people rather than at systems.

When inspecting organizations, inspectors specifically check for evidence of staff training, not just installed software. ZInfV-1 and the GDPR both define this training as a legal obligation, one that organizations often deal with last, even though supervisory authorities check it first. Building a culture of security requires continuous education, clear security policies and procedures, and regular awareness-raising at every level of the organization.

A thorough risk assessment needs to cover every source: IT systems, physical document storage, and the human factor. An organization with excellent technical protection that neglects employee training remains vulnerable. A culture of security, where every employee understands their role, is the most effective long-term defense against incidents.

Key takeaways

Data security requires a simultaneous approach at the technical, organizational, and human level, and none of these three elements is sufficient on its own.

Frequently asked questions

What is data security in short?

Data security is a set of measures for protecting data against unauthorized access, alteration, or loss, ensuring the confidentiality, integrity, and availability of information.

Which law governs personal data protection in Slovenia?

Personal data protection is governed by the GDPR at the EU level and by ZVOP-2 at the national level, with oversight carried out by the Information Commissioner.

How do I protect myself from phishing?

Check the sender of every email, don't click on suspicious links, and enable multi-factor authentication on all your accounts.

Do I have to report a data security breach as a company?

Yes, under the GDPR you must report a breach that endangers personal data to the Information Commissioner within 72 hours of discovering it.

What is multi-factor authentication and why do I need it?

Multi-factor authentication (MFA) requires an additional identity confirmation beyond just a password, which makes it significantly harder for attackers to access your accounts, even if they obtain your password.

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