Adopting cloud computing could provide businesses with an easier way of scaling their applications, working remotely, storing their data, and even providing digital services. However, although cloud computing could make the task of managing IT simpler for businesses, it does change the way security would be done.
This is because rather than managing the applications and data from within the controlled infrastructure of the company, businesses will be required to do so via cloud computing platforms, third-party applications, APIs, remote users, and cloud computing services.
It is therefore important for businesses to think about the issue of cloud computing security prior to adopting cloud computing as opposed to doing so afterward.
What Is Cloud Computing Security?
Contents
- What Is Cloud Computing Security?
- Why Security Should Be Part of Cloud Migration
- Common Cloud Computing Security Risks
- Understanding the Shared Responsibility Model
- What Businesses Should Review Before Moving to the Cloud
- Practical Cloud Security Practices for Businesses
- Making Security Part of the Migration Process
- Is Cloud Security Only an IT Responsibility?
- Conclusion
- Frequently Asked Questions
Cloud computing security refers to the security measures, policies, procedures, and technologies implemented for securing data, applications, infrastructure, and users of the cloud environment.
This security measure entails far more than ensuring that information within a cloud environment is protected. The components that can be found within a cloud environment may include databases, applications, virtual machines, containers, APIs, storage systems, employee accounts, development software, etc. It is necessary to configure and manage all of these to minimize the risk of any vulnerabilities and unauthorized access.
In case businesses are new to the cloud environment, it will be useful for them to get familiar with the basics of cloud computing security. These may include identity management, data protection, workload security, network security, threat detection, and monitoring, among others.
The actual security needs will depend on how a business utilizes cloud technology services. A business using cloud-based SaaS applications may have completely different needs compared to one using multi-cloud platforms for hosting databases and applications of its customers.
Why Security Should Be Part of Cloud Migration
Cloud migration is often approached as a technology project. Teams focus on choosing a provider, moving workloads, updating applications, and making sure everything works after the transition.
Security should be considered alongside those activities rather than added at the end.
For example, a company might migrate a database without reviewing existing access permissions. A development team could create a cloud storage resource with an overly broad configuration, or an application could rely on an API that has not been adequately protected. These problems can be difficult to identify once a large cloud environment is already in production.
Addressing security requirements during planning gives businesses a better opportunity to identify weaknesses and establish appropriate controls before workloads go live.
The CISA Cloud Security Technical Reference Architecture provides guidance on areas such as secure cloud adoption, identity, architecture, and security operations. Although it was developed for government environments, many of the underlying principles are useful for businesses planning or reviewing their own cloud strategies.
A few factors make early security planning particularly important:
- More access points: Employees, applications, APIs, devices, and administrators may connect to cloud resources from different locations.
- Rapid changes: Cloud resources can be created, modified, or removed quickly, which can increase the risk of configuration errors.
- Shared responsibilities: Cloud providers secure parts of the underlying infrastructure, while customers remain responsible for other areas.
- Multiple services: Applications may depend on several cloud platforms, APIs, and third-party services.
- Sensitive information: Businesses may store customer records, financial information, intellectual property, and employee data in cloud environments.
Planning for these factors early can help organizations avoid having to redesign security controls after migration.
Common Cloud Computing Security Risks
Cloud environments introduce many of the same cybersecurity risks found in traditional IT environments, but the scale and complexity of those risks can change.
Misconfigured Resources
The cloud services were built to be flexible. This allows teams to create storage, database, VMs, and other resources. This flexibility may become a potential issue when the configuration of the resource is wrong.
For instance, a storage service may be accidentally made available for everyone, or some network rules might allow access to the resource from other places than intended.
Weak Access Controls
Cloud accounts are usually associated with access to important business information and systems. In case the account credentials of an employee are compromised, an attacker could gain access to applications, data, or management capabilities.
The problem will only get worse with excessive permission privileges of the users. As such, businesses should ensure proper authentication mechanisms and implement the principle of least privilege.
Insecure APIs
Today’s cloud-based applications often depend on APIs in order to share information among applications and services. These APIs must be protected in just the same way as the applications.
Failure to properly authenticate users, control access, validate inputs, and monitor use will leave an application vulnerable to malicious exploitation through its APIs.
Data Exposure and Loss
With cloud storage, information becomes more accessible; however, it may also become available to parties that should not have access to it. Companies need to know where their critical information is stored, who is able to access it, how it is encrypted, and how it may be retrieved when lost.
Limited Visibility
Multiple cloud services might lead to companies struggling with maintaining visibility within their environment. This involves understanding what is in the environment, who can access it, what is changing within it, and what strange behavior is occurring within it.
Lack of proper visibility makes it harder to identify and react to security incidents.
One other important aspect here is how security duties will be apportioned between a company and the cloud provider.
The shift to the cloud does not imply that all the security duties are offloaded to the provider. Cloud providers tend to secure the hardware infrastructure and services that run on it, whereas the customer takes care of aspects like data, identity, configuration, and workloads based on the service model.
This distinction can be better understood when contrasted with traditional infrastructure and cloud infrastructure:
Security Area | Traditional On-Premises | Cloud Environment |
Physical infrastructure | Business | Cloud provider |
Data center security | Business | Cloud provider |
Operating system | Business | Depends on service model |
Application security | Business | Shared |
User identities | Business | Business |
Data protection | Business | Shared |
Network configuration | Business | Shared |
Access permissions | Business | Business |
For instance, in IaaS, there is greater customer responsibility concerning operating systems, applications, configurations, and network management. In SaaS, there is less of the underlying environment that the customer will control.
It is essential to be aware of this difference before deciding to use cloud services since it is necessary to know which part of the security falls to the client and which to the provider.
What Businesses Should Review Before Moving to the Cloud
A security assessment before migration does not have to involve a complicated checklist covering every possible scenario. It should begin with the systems and information that matter most to the business.
Identify Sensitive Information
Start by identifying the data and applications that will move to the cloud. Customer information, financial records, employee data, intellectual property, and confidential business information may require different levels of protection.
Data classification can help determine which information requires stronger access restrictions, encryption, monitoring, or retention controls.
The Australian Cyber Security Centre recommends assessing factors such as data sensitivity, cloud service implementation, management responsibilities, and security requirements when evaluating cloud services. Its cloud security risk assessment guidance can provide a useful reference for businesses conducting this type of review.
Review User and Application Access
The business should assess the requirements and reasons for access to every workload. Access to workloads should be need-based and not just for convenience.
The administrative accounts must be given special consideration due to the ability to make substantial alterations to the cloud computing environment. Multi-factor authentication may prove to be a security measure for such accounts and other critical accounts.
Understand the Architecture
Prior to migration, there is a need to map out the communication methods for application, databases, users, APIs, and other services.
This can enable identification of any unnecessary links as well as help to determine where network control, authentication, encryption, and monitoring is necessary.
Establish Configuration Standards
The way cloud infrastructure is configured by different teams would vary greatly without any standards set forth by the organization.
Developing base configurations can make detecting anomalies much easier, thereby minimizing the chances of deploying cloud infrastructure with excessive exposure.
Plan for Monitoring and Recovery
It is advisable that security monitoring be done prior to migration as opposed to post-issue.
It is crucial that organizations establish what they want to log, how alerts will be analyzed, and how any threats will be dealt with. Tests on the backup and recovery plans should also be undertaken.
Practical Cloud Security Practices for Businesses
Businesses do not need to implement every available security technology immediately. A stronger starting point is to establish a few fundamental practices and build from there.
Use multi-factor authentication. Protect sensitive and administrative accounts with an additional authentication factor rather than relying solely on passwords.
Apply least-privilege access. Give employees and applications only the permissions they need to perform their work.
Encrypt sensitive data. Encryption can help protect information both while it is being transmitted and while it is stored.
Review configurations regularly. Check cloud resources for unnecessary permissions, exposed services, and unexpected changes.
Keep workloads updated. Applying security patches helps reduce exposure to known vulnerabilities in applications and systems.
Maintain reliable backups. Backups should be protected from unauthorized access and tested periodically to confirm that recovery works as expected.
Monitor cloud activity. Logs and security monitoring can help identify unusual authentication attempts, configuration changes, and other potentially suspicious activity.
Train employees. Employees remain an important part of cloud security. Phishing, weak passwords, accidental data sharing, and inappropriate access can create risks even when technical controls are in place.
Businesses that want to explore additional practical approaches can also review cloud security best practices, particularly when considering access controls, authentication, and configuration management.
Making Security Part of the Migration Process
Security considerations for cloud in the migration process compared to adding cloud security after the process makes cloud environments more secure.
When planning, companies have the opportunity to find out about their sensitive information, access requirements, dependency issues and security requirements for each individual workload. During the migration process, those security requirements can be added to the cloud environment.
This cloud environment will be checked in the evolution stage. New applications might be deployed, duties of the employees may change, permission levels of the employees will change and other services will be connected to the workloads. All these changes could pose security threats despite the initial configuration of the cloud environment.
Continuous monitoring and testing of the environment will help companies deal with these changes.
Is Cloud Security Only an IT Responsibility?
The technical controls might be implemented by the IT and security personnel; however, the cloud security impacts the entire organization.
The developers have an impact on the security through the application design and APIs. The managers can make sure that the employees get the right access. The employees must adhere to authentication and data handling policies. The business leaders must be aware of the possible consequences of the security issues.
Thus, when taking a broader perspective, cloud security becomes a part of regular business processes.
Conclusion
Cloud adoption helps businesses to increase their flexibility, but adopting cloud infrastructure implies dealing with additional security challenges. Businesses need to know what kind of environments they have, which information is necessary to protect, who needs to get access, and who bears the responsibility for security between a business and its cloud vendor.
To address these challenges, organizations may start from basics, such as proper authentication, least privilege access control, security configuration, encryption, monitoring, regular data backups, and employee education on security matters. These measures offer good starting points that might be further enhanced as the cloud environment becomes more complicated.
More importantly, organizations need to continue thinking about security even after cloud migration because cloud environments are dynamic, and the security measures must adapt to changes in business requirements and technologies.
Frequently Asked Questions
1. Is cloud computing secure for small businesses?
Cloud computing can be secure for small businesses when appropriate safeguards are in place. Basic measures such as multi-factor authentication, least-privilege access, regular updates, secure backups, and monitoring can provide a strong starting point without requiring a large security operation.
2. What should businesses do first when planning a cloud migration?
Businesses should begin by identifying the applications and data they plan to move. Understanding the sensitivity of that information, who needs access, and what risks already exist can help determine the security controls required in the new environment.
3. Does the cloud provider handle all security responsibilities?
No. Security responsibilities are generally shared between the provider and the customer. The provider typically manages the underlying infrastructure, while the customer remains responsible for areas such as identities, data, configurations, and workloads depending on the cloud service model.
4. How often should cloud security be reviewed?
There is no single review schedule that fits every organization, but security should be assessed whenever significant changes are made to the cloud environment. New applications, changed permissions, additional services, and architectural changes can all introduce new risks, making continuous monitoring and periodic reviews important.