Cloud Security Access Brokers (CASBs) Explained in 2023

CASB stands for Cloud Access Security Broker. It’s a fancy name for a security solution that acts as a broker between you and your cloud service providers. 

A CASB sits between you and the cloud, monitoring and controlling the traffic that goes back and forth. 

CASBs can cover different types of cloud services, such as software-as-a-service (SaaS), platform-as-a-service (PaaS), and infrastructure-as-a-service (IaaS). 

They can also extend the reach of your existing on-premises security infrastructure to the cloud and create new policies for cloud-specific contexts.

CASBs work by intercepting the traffic between you and the cloud services, either through proxies or APIs. After all, Proxies are agents that sit between you and the cloud services, inspecting and modifying the traffic in real-time. 

APIs are interfaces that allow CASBs to communicate with cloud services, retrieving and analyzing data and events.

CASBs can perform various functions depending on the type of traffic they intercept and the policies they enforce. Some of the common functions of CASBs are:

• Visibility: CASBs can give you a clear picture of your cloud usage and risk level. They can help you discover all the cloud services you use, both approved and unapproved (also known as shadow IT). They can also track user activity, data movement, device type, location, and other factors.

• Compliance: CASBs can help you comply with various regulations and standards that apply to data protection in the cloud, such as GDPR, HIPAA, PCI-DSS, etc. They can help you identify and classify sensitive data, apply appropriate controls and encryption, monitor and audit data access and activity, and report on compliance status and violations.

• Data Security: CASBs can protect your data in the cloud from loss, leakage, or theft. They can use advanced data loss prevention (DLP) techniques to prevent unauthorized access or sharing of data, encrypt or tokenize data at rest or in transit, quarantine or delete data in case of breach or policy violation, and recover data in case of disaster.

• Threat Protection: CASBs can protect you from cloud-based threats such as malware, ransomware, phishing, compromised accounts, etc. They can use anomaly detection, threat intelligence sources, anti-malware scans, machine learning algorithms, etc. to detect and prevent malicious activity in the cloud.

CASBs are not just security solutions. They are also business enablers. They allow you to use the cloud without compromising your security or compliance. They enable you to:

• Gain visibility into your cloud usage and risk posture.
  
• Ensure compliance with regulations and standards for data protection in the cloud.
  
• Guard against cloud-based threats such as malware or ransomware.
  
• Optimize your cloud spend by eliminating redundant or unnecessary services.
  
• Enhance your user experience by allowing granular access to useful services.
  
• Integrate with other security solutions for better threat response.
  

CASBs are not just nice to have. They are essential for cloud security in 2023. Here are some of the reasons why you need CASBs for cloud security in 2023:

• Cloud adoption is increasing: More and more businesses are moving their data and applications to the cloud, taking advantage of its scalability, flexibility, and cost-efficiency.
  
  According to Gartner, the worldwide public cloud services market is expected to grow 23.1% in 2021 to a total of $332.3 billion, up from $270 billion in 2020. By 2023, the market is projected to reach $397.4 billion.
  
  This means more data and more services in the cloud and more need for CASBs to secure them.

• Cloud threats are evolving: As cloud adoption increases, so do the threats targeting the cloud. Cybercriminals are constantly developing new ways to exploit the vulnerabilities and misconfigurations of cloud services, such as phishing, malware, ransomware, compromised accounts, etc.
  
  According to a report by McAfee, there was a 630% increase in cloud attacks between January and April 2020.
  
  By 2023, the threats are likely to be more sophisticated and more damaging. This means more need for CASBs to protect the cloud.

• Cloud regulations are changing: As cloud adoption increases, so do the regulations and standards that govern data protection in the cloud. Businesses have to comply with various regulations and standards that apply to their industry and region, such as GDPR, HIPAA, PCI-DSS, etc.
  
  These regulations and standards are constantly changing and updating to reflect the changing needs and threats of cloud computing.
  
  By 2023, the regulations and standards are likely to be more complex and more stringent. This means more need for CASBs to ensure compliance in the cloud.