What is cloud security? Tips to keep business data safe

Published Thursday 2 April 2026

Table of contents

• What is the cloud?
• What is cloud security?
• Five key benefits of cloud computing
• How is the data stored?
• Who's responsible for cloud security?
• Common cloud security threats
• Five key ways you can make your data more secure
• Train your staff about online safety and good security practices
• Keep your business data secure with Xero
• FAQs on cloud security

Key takeaways

• Use strong, unique passwords for every cloud account and enable multi-factor authentication to create multiple layers of protection against unauthorised access.
• Recognise that you share responsibility for cloud security with your provider - while they handle infrastructure and encryption, you must manage user access, train staff, and secure your devices.
• Train your team to spot phishing emails and social engineering attacks, as most cloud security breaches happen due to user error rather than provider failures.
• Install anti-malware software on all devices and monitor login activity regularly to detect suspicious behaviour before it becomes a serious problem.

What is the cloud?

The cloud refers to data and applications stored online rather than on your computer's hard drive. Instead of installing software from a CD-ROM and saving files locally, you access programs and information through the internet.

Internet speeds increased and data storage costs dropped, enabling this change. Now many applications run from remote servers, and the data they generate is stored on those servers too.

Businesses worldwide are moving to the cloud for good reasons. This guide explains the benefits and provides practical tips to help keep your data and your customers' data safer, which is crucial as reports show a notable surge in cyber-attacks targeting smaller businesses.

Security is an ongoing process, so get professional advice if you have specific concerns about your data.

What is cloud security?

Cloud security is the set of practices, technologies, and policies that protect data, applications, and systems stored in the cloud. It guards against unauthorised access, data breaches, and cyber threats.

For small businesses, cloud security means your financial records, customer information, and business data stay protected without needing an in-house information technology (IT) team. Cloud providers handle much of the heavy lifting, but you also play a role in keeping your data safe.

Cloud security typically includes:

• Encryption: Scrambles your data so only authorised users can read it. Modern encryption is so strong that some estimate it would take an average computer five quadrillion years to decrypt data without the key.
• Access controls: Limits who can view or edit your information
• Authentication: Verifies user identities before granting access
• Monitoring: Tracks activity to detect suspicious behaviour
• Backups: Creates copies of your data to prevent loss

Five key benefits of cloud computing

Moving to the cloud offers significant benefits for small businesses, including stronger security than many on-premise solutions. Here are five key advantages:

Lower IT costs but improved experience

Software upgrades, patches, and backups are vital to keeping a business running. Cloud applications handle most of this for you, saving on your IT support bill.

Cloud software typically lets you subscribe monthly at an affordable rate rather than spending a large amount of capital upfront. Security updates happen automatically, so you're always protected against the latest threats without lifting a finger.

Faster updates

Cloud software is developed continuously. New features are added and bugs are fixed quickly, so you always have the latest version.

This matters for security too. When vulnerabilities are discovered, cloud providers can patch them across all users immediately rather than waiting for you to install an update manually.

Access from anywhere at any time

Cloud applications aren't tied to a single desktop computer. You can access your software and data from anywhere with an internet connection, using a laptop, desktop, smartphone, or tablet.

This flexible access comes with built-in security. Professional cloud applications use encrypted connections, so your data stays protected whether you're working from home, a café, or a client's office.

Better business continuity

Power outages, fires, floods, burglaries, and earthquakes are all potential business risks. If your data is stored on a single computer or server, any of these could mean permanent loss.

Cloud-based businesses can recover faster because their data is backed up across multiple secure locations. You could be up and running within hours instead of weeks.

Greater agility

Cloud systems can share data and integrate with each other, letting you process information in new and useful ways.

For example, cloud accounting software can integrate with point-of-sale software. Your sales totals, stock orders, and customer data flow between systems automatically.

When professional cloud apps integrate, they maintain security standards across connected apps, so your data stays protected as it moves between platforms.

How is the data stored?

Secure data centres store your data on servers managed around the clock by professional teams. These facilities have physical security, backup power, and redundant systems to keep your information safe and accessible.

Professional cloud applications also protect data travelling between your computer and those servers. They use secure, encrypted connections that:

• Encrypt data on your device before sending it to the server
• Protect data in transit so no one can intercept what's being sent
• Encrypt data at rest on the server itself

Cloud software companies take data security seriously. But security also depends on how you use the software, which we'll cover next.

Who's responsible for cloud security?

You and your cloud provider share responsibility for cloud security.

Your cloud provider typically handles:

• Infrastructure security: Physical data centres, servers, and networks
• Platform security: Operating systems, software updates, and patches
• Encryption: Protecting data in transit and at rest
• Complying: Meeting industry security standards and certifications
• Monitoring: Detecting and responding to threats at the platform level

You're responsible for:

• Managing access: Choosing strong passwords and controlling who can log in
• How users behave: Training staff to recognise phishing and other scams
• Deciding about data: Choosing what information to store and who can see it
• Setting up accounts: Enabling security features like multi-factor authentication
• Securing devices: Keeping your computers and phones protected with anti-malware

It's like renting a secure office building. The landlord maintains the locks, alarms, and security guards. But you're responsible for not leaving the door open or giving your keys to strangers.

Common cloud security threats

Here are the most common cloud security threats small businesses face:

• Weak passwords: Simple or reused passwords make it easy for attackers to access your accounts
• Phishing attacks: Fake emails trick users into revealing login details or clicking malicious links
• Misconfigured settings: Leaving default settings unchanged or granting too many permissions creates vulnerabilities
• Insider threats: Current or former employees with access may misuse or expose data
• Malware: Malicious software can infect devices and spread to cloud-connected systems, sometimes using a 2,048-bit encryption key to lock an organisation's data.
• Data breaches: Attackers target valuable business and customer information

Most cloud security problems happen because of user error rather than provider failures. By practising basic security, you can prevent most of these threats.

Five key ways you can make your data more secure

Most cloud security problems happen because of how people use the cloud, not because of the cloud itself. These five practices can significantly reduce your risk:

Make sure your passwords are secure

Strong passwords are your first line of defence against unauthorised access. Many people use passwords that seem clever but are actually easy to guess, like pet names combined with birth dates.

Follow these password best practices:

• Make passwords long: Aim for at least 12 characters, or use a passphrase of 20–30 characters
• Keep them random: Avoid personal information like names, dates, or addresses
• Use unique passwords: Never reuse the same password across different accounts
• Consider a password manager: These tools generate and store strong passwords so you only need to remember one

Use multi-factor authentication

Multi-factor authentication adds an extra layer of security beyond your password. Even if someone steals your password, they can't access your account without the second factor.

Multi-factor authentication is also called two-factor authentication or two-step verification. The second factor might be:

• A code from an app: Generated by an authenticator app on your phone
• A text message: A one-time code sent to your mobile number
• A physical device: A security key you plug into your computer
• Biometrics: Your fingerprint, face, or voice

Enable multi-factor authentication on all your cloud accounts, especially those containing financial or customer data.

Take advantage of login and online activity monitoring

Monitoring activity helps you spot when someone accesses your account without authorisation before it becomes a serious problem. Many cloud applications include security features. Review and enable them.

Look for these monitoring options:

• Login history: Check when and where someone last accessed your account
• Device lists: See which computers and phones are connected to your account
• Alert settings: Get notified about suspicious behaviour or new logins
• Access logs: Review who has viewed or changed sensitive information

Change your password immediately and contact your provider if you notice unfamiliar activity.

Use anti-malware (also known as anti-virus software)

Malware (malicious software) can infect your devices and steal data, log passwords, or control your computer. It usually arrives through suspicious email links, attached files, or unsecured websites.

Malware is designed to stay hidden, so you need protection to detect it. Here's how to defend against it:

• Install anti-malware software: Protect all your devices including phones and tablets
• Keep software updated: Updates often include security patches for new threats
• Download from trusted sources: Fake anti-malware is a common trick
• Verify links before clicking: Only click links from senders you recognise and that look legitimate

Be aware of phishing or other hacking methods

Phishing and social engineering target people rather than technology. People who attack trick users into revealing passwords or clicking malicious links.

Common tactics include:

• Fake emails: Messages that look like they're from your bank, supplier, or software provider
• Urgent requests: Pressuring you to act quickly without thinking
• Phone calls: Callers pretending to be IT support or other trusted contacts
• Spoofed websites: Login pages that look real but steal your login details

Verify requests through a separate channel before sharing any sensitive information, and train your team to do the same.

Train your staff about online safety and good security practices

Training your staff is one of the most effective ways to protect your business data. Your team should understand how to practise basic security, regardless of which devices they use.

Key training topics include:

• Password hygiene: Creating and managing strong, unique passwords
• Recognising phishing: Spotting fake emails and suspicious requests
• Safe browsing: Avoiding unsecured websites and downloading unsafe files
• Securing devices: Locking screens and protecting mobile devices
• Reporting incidents: Knowing what to do if something seems wrong

Consider creating a simple data security policy that outlines what you expect from all staff. Securing all devices helps protect your business data.

Keep your business data secure with Xero

Storing data in the cloud can be more secure than keeping it on your own premises. You're protected at a professional grade, your data is backed up automatically, and you can recover faster from problems.

Your security depends on practising these habits:

• Use strong, unique passwords for every account
• Enable multi-factor authentication on all cloud services
• Install anti-malware software on every device
• Train your staff to recognise phishing and social engineering
• Review who you've permitted access regularly
• Follow laws that protect data in your area

Xero built its cloud-based accounting platform with security at its core. Your data is encrypted at bank level, you can authenticate with multiple factors, and security is updated regularly without you managing any of it.

Get one month free and see how Xero keeps your financial data secure while you focus on running your business.

FAQs on cloud security

Here are answers to common questions about cloud security for small businesses.

Is cloud storage safer than keeping data on my own computer?

In most cases, yes. Professional cloud providers invest heavily in securing infrastructure, encrypting data, and monitoring systems, which would be too expensive for most small businesses to maintain themselves.

What happens if my cloud provider has a data breach?

Reputable providers will notify you promptly, explain what data was affected, and outline steps they're taking to prevent this from happening again. Check how your provider handles security and notifies you of breaches before signing up.

Do I need technical expertise to keep my cloud data secure?

No. Practising cloud security is straightforward: use strong passwords, enable multi-factor authentication, and train your team to recognise phishing. Your provider handles the complex technical security.

How often should I update my passwords and security settings?

Change passwords immediately if you suspect your security has been breached. Otherwise, review how you've set up security every few months and update passwords annually or when staff leave your business.

Can I use cloud services if I handle sensitive customer information?

Yes, but choose providers that comply with relevant standards for your industry. Look for certifications like International Organization for Standardization (ISO) 27001 or System and Organization Controls (SOC) 2, and check that how the provider handles data meets your legal obligations.