How to Secure Information: A Complete Guide for Businesses

Every organisation handles data that needs protection, from customer records and financial documents to proprietary business strategies. Understanding how to secure information effectively is not just a technical challenge; it is a legal obligation under multiple data protection frameworks worldwide.

This article provides educational guidance on information security principles and legal requirements. It is not legal advice. Consult a qualified attorney for guidance specific to your situation and jurisdiction.

What Does It Mean to Secure Information?

To secure information is to protect data against unauthorised access, accidental loss, modification, and destruction throughout its entire lifecycle. The concept applies equally to digital files stored on servers, physical documents in filing cabinets, and verbal communications shared in meetings.

Information security professionals organise their work around three core principles known as the CIA triad:

• Confidentiality: ensuring only authorised individuals can access specific data
• Integrity: ensuring data remains accurate, complete, and unaltered by unauthorised parties
• Availability: ensuring authorised users can access data when they need it

A breach of any one of these principles constitutes a security failure. A ransomware attack that encrypts your database compromises availability. A disgruntled employee who alters financial records compromises integrity. A misconfigured cloud storage bucket that exposes customer files compromises confidentiality.

Legal Requirements to Secure Information

Data protection laws around the world impose concrete obligations on organisations that handle personal data. Understanding these requirements is essential for compliance.

GDPR (European Union)

Article 32 of the GDPR requires data controllers and processors to implement "appropriate technical and organisational measures" to ensure a level of security appropriate to the risk. The regulation specifically mentions:

1. Pseudonymisation and encryption of personal data
2. The ability to ensure ongoing confidentiality, integrity, availability, and resilience of processing systems
3. The ability to restore availability and access to personal data in a timely manner after an incident
4. A process for regularly testing, assessing, and evaluating the effectiveness of those measures

Failure to meet these requirements can result in fines of up to 20 million EUR or 4% of annual global turnover, whichever is higher, under Article 83(5) of the GDPR.

CCPA and CPRA (California)

The California Consumer Privacy Act, as amended by the CPRA, grants consumers the right to request deletion of their data and to know what personal information a business collects. While the CCPA does not prescribe specific security measures, Section 1798.150 creates a private right of action for consumers whose nonencrypted and nonredacted personal information is subject to unauthorised access due to a business's failure to implement reasonable security. Statutory damages range from $100 to $750 per consumer per incident.

Sector-Specific Regulations

Beyond general data protection laws, several sector-specific frameworks impose additional requirements:

• HIPAA (healthcare): requires administrative, physical, and technical safeguards for protected health information
• PCI DSS (payment cards): mandates specific controls including encryption, access controls, and regular vulnerability scanning for any entity that stores, processes, or transmits cardholder data
• SOX (financial reporting): requires internal controls over financial reporting, including IT controls

How to Secure Information: Technical Measures

Technical controls form the first line of defence in any information security programme. The following measures are considered baseline requirements by most regulatory frameworks.

Encryption

Encryption transforms readable data into ciphertext that is meaningless without the correct decryption key. Implement encryption at two levels:

• At rest: encrypt data stored on hard drives, databases, backups, and removable media using AES-256 or equivalent
• In transit: enforce TLS 1.2 or higher for all network communications, including internal traffic between services

Article 32(1)(a) of the GDPR explicitly names encryption as an appropriate security measure. Many data breach notification exemptions also apply only when the compromised data was encrypted.

Access Controls

The principle of least privilege dictates that every user, application, and system should have only the minimum access necessary to perform its function. Implement this through:

• Role-based access control (RBAC): assign permissions based on job function, not individual identity
• Multi-factor authentication (MFA): require at least two authentication factors for all systems containing personal data
• Regular access reviews: audit who has access to what on a quarterly basis, revoking access for departed employees immediately

Network Security

Protect your network perimeter and internal segments with:

• Firewalls configured with deny-by-default rules
• Intrusion detection and prevention systems (IDS/IPS)
• Network segmentation to isolate sensitive data from general-purpose systems
• VPN or zero-trust network access for remote workers

Patch Management

Unpatched software remains one of the most common attack vectors. Establish a patch management programme that applies critical security patches within 14 days of release and all other patches within 30 days. Automate where possible.

Organisational Measures to Secure Information

Technology alone cannot protect data. Organisational measures address the human and procedural elements of information security.

Security Policies

Document your security posture in clear, enforceable policies. At minimum, every organisation should maintain:

• An information security policy defining scope, responsibilities, and acceptable use
• A data classification policy categorising data by sensitivity level
• An incident response plan detailing steps for detection, containment, eradication, and recovery
• A data retention and disposal policy specifying how long data is kept and how it is destroyed

Employee Training

Human error causes a significant proportion of data breaches. Regular security awareness training should cover:

1. Recognising phishing emails and social engineering attacks
2. Proper handling of sensitive data, including restrictions on copying to personal devices
3. Password hygiene and the use of password managers
4. Reporting procedures for suspected security incidents

Training should occur at onboarding and at least annually thereafter, with additional sessions when new threats emerge.

Vendor Management

When you share data with third-party service providers, their security becomes your responsibility. Under Article 28 of the GDPR, data controllers must only use processors that provide "sufficient guarantees" of appropriate technical and organisational measures. Conduct due diligence before engaging vendors, include security requirements in contracts, and audit compliance periodically.

Your privacy policy should disclose the categories of third parties with whom you share personal data, which is a requirement under both the GDPR and CCPA.

Building a Secure Information Framework

A structured approach to information security is more effective than ad hoc measures. Several widely recognised frameworks provide blueprints for building a comprehensive programme.

ISO 27001

The international standard for information security management systems (ISMS) provides a systematic approach to managing sensitive company and customer information. Certification demonstrates to regulators, customers, and partners that your organisation takes information security seriously.

NIST Cybersecurity Framework

The National Institute of Standards and Technology framework organises security activities into five functions:

1. Identify: understand your assets, risks, and regulatory requirements
2. Protect: implement safeguards including access controls, training, and encryption
3. Detect: deploy continuous monitoring to identify security events
4. Respond: execute your incident response plan when events occur
5. Recover: restore normal operations and apply lessons learned

CIS Controls

The Centre for Internet Security publishes a prioritised set of 18 controls that provide a practical starting point for organisations building their security programme. The controls are ranked by effectiveness, allowing resource-constrained organisations to focus on the measures that deliver the greatest risk reduction first.

How to Secure Information on Your Website

Websites present specific information security challenges because they are publicly accessible and handle personal data through forms, cookies, and tracking technologies.

SSL/TLS Certificates

Every website that collects any form of user data must use HTTPS. Modern browsers flag HTTP sites as "Not Secure," which erodes user trust and harms search rankings. Obtain and maintain a valid TLS certificate, configure your server to redirect all HTTP traffic to HTTPS, and enable HTTP Strict Transport Security (HSTS).

Cookie and Tracking Controls

Cookies and tracking scripts can collect personal data that triggers obligations under the GDPR's ePrivacy Directive and similar laws. Implement a cookie consent mechanism that obtains explicit consent before setting non-essential cookies, provides granular choices by cookie category, and records consent as evidence of compliance.

A compliance scanner can help identify all cookies and trackers active on your site, including those injected by third-party scripts you may not be aware of. TermsBox offers an automated compliance scanner that detects cookies and tracking technologies, paired with a consent management platform that handles the consent workflow.

Form Data Protection

Contact forms, registration forms, and checkout processes collect personal data that requires protection. Implement CSRF tokens to prevent cross-site request forgery, validate and sanitise all input server-side to prevent injection attacks, use CAPTCHA or rate limiting to block automated abuse, and transmit form data only over encrypted connections.

Privacy Policy and Legal Documents

Transparency about how you secure information builds user trust and satisfies legal disclosure requirements. Your website should publish a clear privacy policy that explains what data you collect, how you protect it, and what rights users have. Consider also publishing a terms of service that addresses data handling obligations for your users.

Responding to a Security Incident

Even with robust preventive measures, security incidents can occur. How you respond determines the legal, financial, and reputational consequences.

GDPR Breach Notification

Under Articles 33 and 34 of the GDPR, organisations must:

• Notify the relevant supervisory authority within 72 hours of becoming aware of a personal data breach, unless the breach is unlikely to result in a risk to individuals
• Notify affected individuals without undue delay when the breach is likely to result in a high risk to their rights and freedoms

The notification must describe the nature of the breach, the categories and approximate number of individuals affected, the likely consequences, and the measures taken to address the breach.

Documentation Requirements

Regardless of whether notification is required, Article 33(5) of the GDPR mandates that organisations document all personal data breaches, including the facts, effects, and remedial actions taken. This documentation enables supervisory authorities to verify compliance during audits.

Post-Incident Improvement

Every security incident should trigger a post-incident review that identifies root causes, evaluates the effectiveness of the response, and produces concrete improvements to prevent recurrence. Update your security policies, controls, and training based on the findings.

Common Mistakes When Trying to Secure Information

Organisations frequently undermine their security efforts through avoidable errors:

• Over-collecting data: collecting more personal data than necessary increases both the attack surface and the regulatory burden. Apply data minimisation principles from the outset.
• Neglecting physical security: digital controls mean little if an attacker can walk into your office and access unlocked workstations or printed documents.
• Ignoring shadow IT: employees using unauthorised cloud services, messaging apps, or personal devices to process business data create uncontrolled exposure.
• Treating security as a one-time project: threats evolve continuously. Security requires ongoing investment, monitoring, and adaptation.
• Failing to test: untested backups, incident response plans, and security controls provide false assurance. Regular testing, including penetration testing and disaster recovery exercises, is essential.

Frequently Asked Questions

What does it mean to secure information?

To secure information means protecting data from unauthorised access, disclosure, alteration, and destruction through a combination of technical controls, organisational policies, and legal compliance measures. It covers digital data, physical records, and verbal communications across their entire lifecycle from collection to disposal.

What are the three pillars of information security?

The three pillars are confidentiality, integrity, and availability, commonly known as the CIA triad. Confidentiality ensures only authorised parties can access data. Integrity ensures data is accurate and has not been tampered with. Availability ensures data is accessible to authorised users when they need it.

What laws require businesses to secure information?

Multiple laws impose information security obligations on businesses. The GDPR (Article 32) requires appropriate technical and organisational measures for EU personal data. The CCPA grants California consumers rights that require security infrastructure. Sector-specific regulations include HIPAA for healthcare, PCI DSS for payment card data, and SOX for financial reporting.

How often should a business review its information security measures?

Businesses should conduct a formal security review at least annually, with continuous monitoring in between. Article 32 of the GDPR specifically requires organisations to implement a process for regularly testing, assessing, and evaluating the effectiveness of technical and organisational measures. Any significant change to systems, personnel, or data processing activities should trigger an immediate review.