Segurança na Nuvem

What is the Cloud Security Shared Responsibility Model? 

Autor: Ioana Grigorescu, Gerente de Conteúdo

Revisado por: George Ploaie, Diretor de Operações (COO)

What is the Cloud Security Shared Responsibility Model

What is the Cloud Security Shared Responsibility Model?

The Cloud Security Shared Responsibility Model defines the security responsibilities of cloud service providers (CSPs) and their customers. 

It states that while the CSP is responsible for the security of the cloud, the customer is responsible for securing the applications and data hosted on the cloud. 

This model clarifies the responsibilities of both the CSP and the customer and promotes effective cloud security and compliance. 

Lembre-se

If the principles of this model are not understood and applied, several security gaps may accumulate and lead to data breaches.

What is the Cloud Security Shared Responsibility Model?

A prova social é uma tática psicológica popular em que as pessoas consideram o feedback e as impressões dos usuários para tomar diferentes decisões de compra.
As empresas de SaaS usam a prova social para demonstrar que seus produtos oferecem experiências positivas e atendem às necessidades dos usuários.
Construir confiança é fundamental para os negócios de SaaS, pois os clientes buscam soluções de longo prazo em vez de compras únicas.

How does the Shared Responsibility Model work in cloud security?

The Shared Responsibility Model allocates the responsibility of security and compliance to the cloud service provider (CSP) and the customer. It is the CSP that bears responsibility for the security of the cloud, which includes the: 

  • Infraestrutura
  • hardware
  • cloud service software
  • implementation of security measures to protect against threats like DDoS attacks and vulnerabilities in the cloud platform

In contrast, the customer is responsible for security in the cloud, including:

  • data
  • applications
  • identity and access management
  • operating systems, depending on the service model in use.

How does responsibility for security differ between IaaS, PaaS, and SaaS in the Shared Responsibility Model?

In the Shared Responsibility Model, the division of security tasks varies significantly across Infrastructure as a Service (IaaS), Platform as a Service (PaaS)e Software como Serviço (SaaS).  

 

Modelo 

Security responsibilities

Infrastructure as a Service (IaaS)

provides the most control, with the provider managing the infrastructure and the customer responsible for everything else

Platform as a Service (PaaS)

shifts some responsibility to the provider, covering operating systems and middleware, leaving the customer responsible for applications and data

Software como Serviço (SaaS)

provides the least amount of control, with the provider taking care of most aspects, and the customer being responsible for system data and user access management. 

What tools are available to help customers manage their cloud security responsibilities within the Shared Responsibility Model?

There are plenty of tools available to help people perform their cloud security tasks, including:

  • identity and access management (IAM) solutions for controlling user access,
  • vulnerability scanners to find weaknesses in applications and infrastructure
  • security information and event management (SIEM) systems for threat detection and incident response.

Cloud providers also provide:

These tools have to be configured and used properly to achieve effective cloud security. 

How does the Shared Responsibility Model impact an organization's cloud security posture?

The Shared Responsibility Model has changed Segurança na Nuvem by separating security operations between the cloud provider and customer. Having a firm grasp on this concept is essential for achieving and maintaining a secure position. 

This model: 

  • minimizes overhead by shifting infrastructure security to the provider 
  • allows SaaS companies to focus on their data and application security
  • offers cloud providers the option to attribute additional security resources and expertise

However, the shared responsibility model can lead to increased confusion and security gaps if roles and responsibilities are not understood by the parties involved.

Additionally, SaaS organizations might find themselves relying more on the cloud provider’s infrastructure security processes.

Dica Profissional

Continuously monitor and adapt your security controls.

Conclusão

The Cloud Security Shared Responsibility Model clearly defines the responsibilities of cloud providers and customers in terms of cloud security. This model should be well understood, and weaknesses in security policies should be eliminated through continuous improvement, allowing organizations to feel safe about the complexity of cloud security and the protection of their assets. 

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