Cloud security is a fundamentally new landscape for many companies. While many of the security principles remain the same as on-premises, the implementation is often very different. This overview provides a snapshot of five best practices for cloud security: identity and access control, security posture management, apps, and data security, threat protection, and network security.
Strengthen Access Control
Traditional security practices are not enough to defend against modern security attacks. Therefore, the modern security practice is to “assume breach”: protect as though the attacker has breached the network perimeter. Today, users work from many locations with multiple devices and apps. The only constant is user identity, which is why it is the new security control plane.
Institute multifactor authentication
Provide another layer of security by requiring two or more of the following authentication methods:
• Something you know (typically a password)
• Something you have (a trusted device that is not easily duplicated, like a phone)
• Something you are (biometrics)
Take advantage of conditional access
Master the balance between security and productivity by factoring how a resource is accessed into an access control decision. Implement automated access control decisions for accessing your cloud apps that are based on conditions.
Operate in a zero-trust model
Verify the identity of everything and anything trying to authenticate or connect before granting access.
Improve Security Posture
With increased recommendations and security vulnerabilities identified, it is harder to triage and prioritize response. Make sure you have the tools you need to assess your current environments and assets and identify potential security issues.
Improve your current posture
Use a tool like Secure Score in Azure Security Centre to understand and improve your security posture by implementing best practices.
Share progress on your secure score with stakeholders to demonstrate the value that you are providing to the organisation as you improve organisational security.
Collaborate with your DevOps team on policies
To get out of reactive mode, you must work with your DevOps teams up front to apply key security policies at the beginning of the engineering cycle as secure DevOps.
Secure Apps and Data
Protect data, apps, and infrastructure through a layered, defense-in-depth strategy across identity, data, hosts, and networks.
Encrypt data at rest and in transit. Consider encrypting data at use with confidential computing technologies.
Share the responsibility
When a company operates primarily on-premises, it owns the whole stack and is responsible for its own security. Depending on how you use the cloud, your
responsibilities change, with some responsibilities moving to your cloud provider.
• IaaS: for applications running on virtual machines, more of the burden is on the
customer to ensure that both the application and OS are secure.
• PaaS: as you move to cloud-native PaaS, cloud providers like Microsoft will take more of the security responsibility at the OS level itself.
• SaaS: at the SaaS level, more responsibility shifts away from the customer
Follow security best practices
Ensure your open-source dependencies do not have vulnerabilities. Additionally, train your developers in security best practices such as Security Development Lifecycle (SDL).
Operational security posture – protect, detect, and respond – should be informed by unparalleled security intelligence to identify rapidly evolving threats early so you can respond quickly.
Enable detection for all resource types
Ensure threat detection is enabled for virtual machines, databases, storage, and IoT. Azure Security Center has built-in threat detection that supports all Azure resource types.
Integrate threat intelligence
Use a cloud provider that integrates threat intelligence, providing the necessary context, relevance, and prioritisation for you to make faster, better, and more proactive decisions.
M0dernise your security information and event management (SIEM)
Consider a cloud native SIEM that scales with your needs, uses AI to reduce noise, and requires no infrastructure.
Protect the Network
We’re in a time of transformation for network security. As the landscape changes, your security solutions must meet the challenges of the evolving threat landscape and make it more difficult for attackers to exploit networks.
Keep strong firewall protection
Setting up your firewall is still important, even with identity and access
management. Controls need to be in place to protect the perimeter, detect hostile activity, and build your response. A web application firewall (WAF) protects web apps from common exploits like SQL injection and cross-site scripting.
Enable Distributed Denial of Service
Protect web assets and networks from malicious traffic targeting application and network layers, to maintain availability and performance, while containing operating costs.
Create a micro-segmented network
A flat network makes it easier for attacks to move laterally. Familiarize yourself with concepts like virtual networking, subnet provisioning, and IP addressing. Use micro-segmentation and embrace a whole new concept of micro perimeters to support zero-trust networking.