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Myth Busters: How to Securely Migrate to the Cloud
Security is top of mind for every company and every IT team – as it should be. The personal data of employees and customers is on the line and valuable company information is at risk. Security protocols are subject to even closer scrutiny when companies are considering migrating to the cloud.
More and more enterprises recognize that they need to pursue cloud adoption to future-proof their tech stack and achieve their business transformation objectives. The agility and cost savings the cloud provides is fast becoming a requirement for competing in today's marketplace. Despite the growing sense that cloud is the future, many companies are hesitant to migrate their applications as they believe the cloud is not as secure as on-premise. This is a common myth, and far from the truth. While security must remain a top priority for IT professionals during the migration process, there is a successful pathway to safely and securely migrate.
Who Owns What in the Cloud?
In today's "cloud wars" landscape, it can be difficult to separate fact from fiction – and it's clear that many IT professionals feel the cloud is less secure. It's time to address this myth. The cloud can be just as secure, if not more so, than a traditional on-premise environment. A survey by AlertLogic found that security issues do not vary greatly whether the data is stored on-premise or in a public cloud. Although there is the belief that public cloud servers are most at risk for an attack, on-premise systems are typically older, complex legacy systems, which can be more difficult to secure. The public cloud has the advantage of being less dependent on other legacy technologies.
Significant advancements have been made to ensure cloud migration and management can be executed in a highly secure fashion. For example, the major cloud providers today have developed a large partner network with cloud-native tools and services built from the ground up to specifically address cloud security. Public cloud providers have extensive security-focused teams and experts on staff to ensure that the cloud remains secure, supported by an ecosystem of cloud certified Managed Service Providers ("MSPs") who can monitor and assess threat risk every step of the way. If done properly, organizations can take advantage of these advanced products and skilled resources to secure and harden their cloud environment. Most IT organizations, driven to be lean and efficient, simply can't replicate the same level of security which leverages layers of security expertise and experience. The biggest threats are people related, either through inadvertent implementation and configuration errors, lack of proactive management discipline (e.g. applying patches) or malicious exploitation of vulnerabilities which, unfortunately, originate most easily from someone inside.
Unlike an on-premise data center deployed and managed by internal IT staff in which the organization is solely responsible, security and compliance in public cloud operates under a shared responsibility model. The cloud provider is responsible for security of the cloud and the customer is responsible for security in the cloud. What this means is that providers such as Amazon Web Services (AWS), manage and control the host operating system, physical security of its facilities, hardware, software, virtualization layer and infrastructure including networking, database, storage and compute resources. Meanwhile, the customer is responsible for system security above the hypervisor – things like data encryption in-transit and at rest, guest operating systems, networking traffic protection, platform and application security including updates and security patches.
The hybrid cloud is another valuable pathway for companies that aren't ready or able, for various reasons, to make the full leap to the public cloud. The shared responsibility model for security and compliance applies to hybrid cloud which utilizes a combination of public cloud, private cloud and/or on-premise environment. This definition, understanding and execution of roles is critical for cloud security. According to Gartner, by 2020, 90 percent of companies will utilize some form of the hybrid cloud. In the end, security requires expertise, tools, discipline and governance. The ability for organizations to leverage and push responsibility to vendors is an underlying benefit of cloud.
How to Move to Cloud Safely
The migration process isn't a simple task. While there is no universal pathway to migrating securely, the following tips will help IT professionals make the move:
Assess and plan in advance for all source data to be transferred. The data should be encrypted at rest on the source, prior to transfer, with a strong encryption algorithm.
Perform a hardening of the server before copying any data. Allow only specific and minimal sets of ports with restrictions to specific IP and CIDR.
Implement proper authorization and access control according to organizational security permission and roles. Restrict access as needed to data sourced, transmitted or stored in the cloud.
Finally, establish audit and monitoring which must be enabled, maintained, monitored and archived for ongoing and historical analysis at any moment in time.
Having a plan in place post-migration is also vital, as security doesn't stop when the migration is complete. Companies should continue to assess their applications to ensure security remains a top priority. Working with a third-party provider or MSP skilled in cloud security can help take some of the load off the IT team, as systems require continuous updates, maintenance and cost optimization that will need to be monitored to ensure that resources deployed in the cloud are being used as efficiently and safely as possible.
Cloud technology has advanced significantly over the past 5 years. While IT pros may miss the sense of security of actually being able to physically see, restrict and manage access to their tech stack in an on-premise environment, the tide has shifted so that the benefits of cloud along with the maturity and ongoing evolution of cloud security products and services has enabled organizations to achieve a high, if not increased, level of security if implemented properly.
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