Challenges in Securing Cloud Environments
As organizations increasingly migrate their data and applications to the cloud, new security challenges emerge:
- Shared Responsibility Model: Cloud providers operate on a shared responsibility model. While they’re responsible for the security of the cloud infrastructure, customers are often responsible for securing the data and applications they put in the cloud.
- Visibility and Control: Traditional on-premises security tools may not provide the same level of visibility or control over cloud environments.
- Data Loss and Leakage: Without appropriate controls, sensitive data can be inadvertently shared or exposed in the cloud.
- Compliance: Meeting regulatory compliance requirements can be more complex in a cloud environment, especially when data resides in multiple geographic locations.
- Misconfigurations: Incorrectly configured cloud services, storage, or databases can inadvertently expose data.
- Access Management: Ensuring only authorized individuals can access cloud resources and data is a challenge, especially in environments that embrace the “anytime, anywhere” accessibility of the cloud.
- Threats from Insiders: Disgruntled employees or malicious insiders can pose a significant threat, especially when they have access to cloud environments.
- API Vulnerabilities: Cloud services often rely on APIs for integration and functionality. These APIs, if not properly secured, can become points of vulnerability.
Cloud Access Security Brokers (CASB) and Their Role in Cloud Security
Cloud Access Security Brokers (CASB) act as intermediaries between an organization’s on-premises infrastructure and cloud service providers. They help address the unique security concerns associated with cloud usage.
Key Functions of CASBs:
- Visibility: CASBs offer insights into cloud application use within an organization, helping identify unsanctioned (“shadow IT”) cloud usage.
- Data Security: They help ensure that sensitive data in the cloud is identified and adequately protected through encryption, tokenization, or masking.
- Threat Protection: CASBs can identify and block malicious activity in real-time, safeguarding against both known and zero-day threats.
- Compliance Management: They help ensure that cloud services adhere to industry regulations and compliance mandates.
- Access Control: CASBs enforce access policies based on various factors, such as user identity, device, location, and the sensitivity of the accessed data or application.
- Adaptive Authentication: Based on user behavior and other risk factors, CASBs can enforce multi-factor authentication for additional security.
- Application Management: They can enforce policies on cloud applications to restrict specific high-risk features or actions.
- Encryption Management: CASBs provide encryption services, ensuring data is protected both at rest in the cloud and during transit.
In essence, as cloud adoption grows, so does the importance of implementing robust security measures tailored to the cloud’s unique environment. CASBs play a critical role in this landscape, bridging the gap between traditional security postures and the dynamic, distributed nature of cloud services. They provide organizations with the tools needed to securely leverage the benefits of the cloud while mitigating potential risks.
Key terms in plain language
Open a term for a concise explanation of language used on this page.
Cloud Computing
Computing resources—such as applications, servers, storage, or databases—delivered from remote infrastructure and scaled as requirements change.
Multi-Factor Authentication (MFA)
A login control requiring more than one form of verification, such as a password plus an authenticator app, security key, or biometric factor.
API
An application programming interface is a defined way for software systems to exchange data or request functions from one another.
Infrastructure as a Service (IaaS)
Cloud-based servers, storage, and networking that customers configure and manage without owning the underlying data-center hardware.
Software as a Service (SaaS)
Software accessed as an online service instead of being installed and maintained entirely on the customer’s own computers or servers.
Disaster Recovery (DRaaS)
A plan and service for restoring applications, data, and operations after an outage or disruption. DRaaS provides recovery infrastructure through a managed cloud service.