What is Cloud Security? What You Need to Know

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Cloud security, also known as cloud computing security, encompasses a collection of measures designed to protect data, applications, and infrastructure residing within cloud environments. This security framework prioritises user and device authentication, enforces access controls for data and resources, and safeguards data privacy. Additionally, cloud security practices play a crucial role in ensuring an organisation’s adherence to data-related regulations.

Cloud Deployment Models

As organisations migrate to the cloud, security considerations are paramount. Selecting the optimal cloud deployment model is a crucial step in establishing a robust security posture. Here’s a breakdown of the four main cloud deployment models, highlighting their security implications:

  • Public Cloud

  • Shared infrastructure, cost-effective, high inherent risk.
  • Security relies on provider; choose one with strong practices.
  • Ideal for non-sensitive data/applications.
  • Private Cloud

  • Dedicated infrastructure, highest control & security.
  • Requires robust security measures even with control.
  • Ideal for sensitive data/applications (higher cost).
  • Hybrid Cloud

  • Combines public & private clouds for flexibility.
  • Needs strong security protocols for data transfer.
  • Balances cost, scalability, and control (increased complexity).
  • Multi-Cloud

  • Utilises services from multiple public cloud providers.
  • Offers maximum flexibility and best-in-breed options.
  • Managing multiple environments with varying security adds complexity.

Cloud Security Challenges

Cloud security solutions exist, but organisations still face challenges in protecting their data. Here are some key obstacles to be aware of:

  • Misconfiguration: Improper cloud setup creates vulnerabilities (weak access controls, storage issues, network misconfigurations). Attackers can exploit these to gain unauthorised access or modify resources.
  • Unauthorised Access: Without proper controls and authentication, malicious actors can exploit weak passwords or compromised credentials to gain unauthorised access to sensitive data.
  • Account Hijacking: Phishing campaigns or compromised credentials can allow attackers to take control of user accounts, granting access to critical data and resources.
  • Limited Visibility: Lack of visibility into the cloud environment makes it difficult to monitor and detect security issues. Inadequate logging and auditing hinder threat identification and response.
  • Data Privacy/Confidentiality: Ensuring proper handling of sensitive data and understanding cloud provider security measures are crucial for compliance and data protection.
  • External Data Sharing: Collaboration and data exchange require careful management to avoid unintended disclosure. Strong access controls and encryption are essential.
  • Regulations: Cloud practices must comply with relevant regulations (varying by region and industry) to avoid legal and reputational risks.

The 4 Pillars of Cloud Security

A robust cloud security strategy relies on four key components working in concert. Here’s a breakdown of these essential elements:

  • Identity and Access Management (IAM)

  • Access Control: Ensures only authorised users and systems can access cloud resources through multi-factor authentication and other measures.
  • Least Privilege: Defines what actions users can perform, minimising access rights and reducing risks.
  • Account Lifecycle Management: Manages user accounts, creating, modifying, and removing them to prevent unauthorised access by former employees.
  • Network Security

  • Perimeter Defences: Firewalls, intrusion detection systems, and VPNs form a strong perimeter defence to block unauthorised access.
  • Segmentation: Isolates different network segments using VLANs to minimise the impact of a security breach.
  • Continuous Monitoring: Continuous monitoring of network traffic helps identify suspicious activity and allows for swift response to potential threats.
  • Data Security

  • Encryption: Protects sensitive data with encryption, rendering it unusable even if intercepted.
  • Data Loss Prevention (DLP): Safeguards sensitive data by identifying, monitoring, and preventing unauthorised access, sharing, or accidental exposure. This ensures compliance with data protection regulations.
  • Backups & Recovery: Regular backups ensure data can be restored quickly in case of incidents, minimising downtime and data loss.
  • Application Security

  • Secure Coding: Identifies and fixes vulnerabilities within applications through secure coding practices and regular code reviews.
  • API Security: Ensures APIs (application programming interfaces) are secure, preventing unauthorised access or manipulation of data and services.
  • Web Application Firewalls (WAFs): Protects web applications from attacks like cross-site scripting (XSS) and SQL injection by filtering and monitoring web traffic.


For comprehensive cloud security implementation, organisations can leverage the expertise of cloud consultancy services. These services can guide organisations in selecting the appropriate security measures, configuring cloud environments securely, and establishing ongoing monitoring and maintenance practices. By partnering with a qualified cloud consultancy service, organisations can ensure their cloud security posture remains robust and adaptable in the face of evolving threats.

Don’t leave your cloud security to chance. Secure your digital assets and achieve peace of mind by contacting a cloud consultancy services provider today!


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