We are often asked if the cloud is more secure than on-premise infrastructure. The quick answer is that, in general, it is. The complete answer is more nuanced and is grounded in a series of cloud security “megatrends” that drive technological innovation and improve the overall security posture of cloud providers and customers.
An on-prem environment can, with a lot of effort, have the same default level of security as a reputable cloud provider’s infrastructure. Conversely, a weak cloud configuration can give rise to many security issues. But in general, the base security of the cloud coupled with a suitably protected customer configuration is stronger than most on-prem environments.
Google Cloud’s baseline security architecture adheres to zero-trust principles—the idea that every network, device, person, and service is untrusted until it proves itself. It also relies on defense in depth, with multiple layers of controls and capabilities to protect against the impact of configuration errors and attacks.
At Google Cloud, we prioritize security by design and have a team of security engineers who work continuously to deliver secure products and customer controls. Additionally, we also take advantage of industry megatrends that increase cloud security further, outpacing the security of on-prem infrastructure.
These eight megatrends actually compound the security advantages of the cloud compared with on-prem environments (or at least those that are not part of a distributed or trusted partner cloud). IT-decision makers should pay close attention to these megatrends because they’re not just transient issues to be ignored once 2023 rolls around—they guide the development of cloud security and technology, and will continue to do so for the foreseeable future.
At a high level, these eight megatrends are:
Economy of scale: Decreasing the marginal cost of security raises the baseline level of security.
Shared fate: A flywheel of increasing trust drives more transition to the cloud, which compels even higher security and even more skin-in-the-game from the cloud provider.
Healthy competition: The race by deep-pocketed cloud providers to create and implement leading security technologies is the tip of the spear of innovation.
Cloud as the digital immune system: Every security update the cloud gives the customer is informed by some threat, vulnerability, or new attack technique often identified by someone else’s experience. Enterprise IT leaders use this accelerating feedback loop to get better protection.
Software-defined infrastructure: Cloud is software defined, so it can be dynamically configured without customers having to manage hardware placement or cope with administrative toil. From a security standpoint, that means specifying security policies as code, and continuously monitoring their effectiveness.
Increasing deployment velocity: Because of cloud’s vast scale, providers have had to automate software deployments and updates, usually with automated continuous integration/continuous deployment (CI/CD) systems. That same automation delivers security enhancements, resulting in more frequent security updates.
Simplicity: Cloud becomes an abstraction-generating machine for identifying, creating and deploying simpler default modes of operating securely and autonomically.
Sovereignty meets sustainability: The cloud’s global scale and ability to operate in localized and distributed ways creates three pillars of sovereignty. This global scale can also be leveraged to improve energy efficiency.
Let’s look at these megatrends in more depth.
Economy of scale: Decreasing marginal cost of security
Public clouds are of sufficient scale to implement levels of security and resilience that few organizations have previously constructed. At Google, we run a global network, we build our own systems, networks, storage and software stacks. We equip this with a level of default security that has not been seen before, from our Titan security chips which assure a secure boot; our pervasive data-in-transit and data-at-rest encryption; and make available confidential computing nodes that encrypt data even while it’s in use.
We prioritize security, of course, but prioritizing security becomes easier and cheaper because the cost of an individual control at such scale decreases per unit of deployment. As the scale increases, the unit cost of control goes down. As the unit cost goes down, it becomes cheaper to put those increasing baseline controls everywhere.
Finally, where there is necessary incremental cost to support specific configurations, enhanced security features, and services to support customer security operations and updates, then even the per-unit cost of that will decrease. It may be chargeable but it is still a lower cost than on-prem services whose economics are going in the other direction. Cloud is, therefore, the strategic epitome of raising the security baseline by reducing the cost of control. The measurable level of security can’t help but increase.
Shared fate: The flywheel of cloud expansion
The long-standing shared responsibility model is conceptually correct. The cloud provider offers a secure base infrastructure (security of the cloud) and the customer configures their services on that in a secure way (security in the cloud). But, if the shared responsibility model is used more to allocate responsibility when incidents occur and less as a means of understanding mutual collective responsibility, then we are not living up to mutual expectations or responsibility.
Taking a broader view of a “shared responsibility” model, we should use such a model to create a mutually beneficial shared fate. We’re in this together. We know that if our customers are not secure, then we as cloud providers are collectively not successful. This shared fate extends beyond just Google Cloud and our customers—it affects all the clouds because a trust issue in one impacts the trust in all. If that trust issue makes the cloud “look bad,” then current and potential future customers might shy away from the cloud, which ultimately puts them in a less-secure position.
Further, “shared fate” goes beyond just the reality of shared consequences. We view this as a philosophy of deeply caring about customer security, which gives rise over time to elements like:
Secure-by-default configurations. Our default configurations ensure security basics have been enabled and that all customers start from a high security baseline, even if some customers change that later.
Secure blueprints. Highly opinionated configurations for assemblies of products and services in secure-by-default ways, with actual configuration code, so customers can more easily bootstrap a secure cloud environment.
Secure policy hierarchies. Setting policy intent at one level in an application environment should automatically configure down the stack so there’s no surprises or additional toil in lower-level security settings.
Consistent availability of advanced security features. Providing advanced features to customers across a product suite and available for new products at launch is part of the balancing act between faster new launches and the need for security consistency across the platform. We reduce the risks customers face by consistently providing advanced security features
High assurance attestation of controls. We provide this through compliance certifications, audit content, regulatory compliance support, and configuration transparency for ratings and insurance coverage from partners such as our Risk Protection Program.
Shared fate drives a flywheel of cloud adoption. Visibility into the presence of strong default controls and transparency into their operation increases customer confidence, which in turn drives more workloads coming onto cloud. The presence of and potential for more sensitive workloads in turn inspires the development of even stronger default protections that benefit customers.
Healthy competition: The race to the top
The pace and extent of security feature enhancement to products is accelerating across the industry. This massive, global-scale competition to keep increasing security in tandem with agility and productivity is a benefit to all.
For the first time in history, we have companies with vast resources working hard to deliver better security, as well as more precise and consistent ways of helping customers manage security. While some are ahead of others, perhaps sustainably so, what is consistent is that cloud will always lead on-prem environments which have less of a competitive impetus to provide progressively better security.
On-prem may not ever go away completely, but cloud competition drives security innovation in a way that on-prem hasn’t and won’t.
Cloud as the digital immune system: Benefit for the many from the needs of the few(er)
Security improvements in the cloud happen for several reasons:
The cloud provider’s large number of security researchers and engineers postulate a need for an improvement based on a deep theoretical and practical knowledge of attacks.
A cloud provider with significant visibility on the global threat landscape applies knowledge of threat actors and their evolving attack tactics to drive not just specific new countermeasures but also means of defeating whole classes of attacks.
A cloud provider deploys red teams and world-leading vulnerability researchers to constantly probe for weaknesses that are then mitigated across the platform.
The cloud provider’s software engineers often incorporate and curate open-source software and often support the community to drive improvements for the benefit of all.
The cloud provider embraces vulnerability discovery and bug bounty programs to attract many of the world’s best independent security researchers.
And, perhaps most importantly, the cloud provider partners with many of its customer security teams, who have a deep understanding of their own security needs, to drive security enhancements and new features across the platform.
This is a vast, global forcing function of security enhancements which, given the other megatrends, is applied relatively quickly and cost-effectively.
If the customer’s organization can not apply this level of resources, and realistically even some of the biggest organizations can’t, then an optimal security strategy is to embrace every security feature update the cloud provides to protect networks, systems, and data. It’s like tapping into a global digital immune system.
Software-defined infrastructure: Continuous controls monitoring vs. policy intent
One of the sources of the comparative advantage of the cloud over on-prem is that it is a software-defined infrastructure. This is a particular advantage for security since configuration in the cloud is inherently declarative and programmatically configured. This also means that configuration code can be overlaid with embedded policy intent (policy-as-code and controls-as-code).
The customer validates their configuration by analysis, and then can continuously assure that configuration corresponds to reality. They can model changes and apply them with less operating risk, permitting phased-in changes and experiments. As a result, they can take more aggressive stances to apply tighter controls with less reliability risk. This means they can easily add more controls to their environment and update it continuously. This is another example of where cloud security aligns fully with business and technology agility.
The BeyondProd model and SLSA framework are prime examples of how our software-defined infrastructure has helped improve cloud security. BeyondProd and the BeyondCorp framework apply zero-trust principles to protecting cloud services. Just like not all users are in the same physical location or using the same devices, developers do not all deploy code to the same environment. BeyondProd enables microservices to run securely with granular controls in public clouds, private clouds, and third-party hosted services.
The SLSA framework applies this approach to the complex nature of modern software development and deployment. Developed in collaboration with the Open Source Security Foundation, the SLSA framework formalizes criteria for software supply chain integrity. That’s no small hill to climb, given that today’s software is made up of code, binaries, networked APIs and their assorted configuration files.
Managing security in a software-defined infrastructure means the customer can intrinsically deliver continuous controls monitoring, constant inventory assurance and be capable of operating at an “efficient frontier” of a highly secure environment without having to incur significant operating risks.
Increasing deployment velocity
Cloud providers use a continuous integration/continuous deployment model. This is a necessity for enabling innovation through frequent improvements, including security updates supported by a consistent version of products everywhere, as well as achieving reliability at scale.
Cloud security and other mechanisms are API based and uniform across products, which enables the management of configuration in programmatic ways—also known as configuration-as-code. When configuration-as-code is combined with the overall nature of cloud being a software-defined infrastructure, it enables customers to implement CI/CD approaches for software deployment and configuration to enable consistency in their use of the cloud.
This automation and increased velocity decreases the time customers spend waiting for fixes and features to be applied. That includes the speed of deploying security features and updates, and permits fast roll-back for any reason. Ultimately, this means that the customer can move even faster yet with demonstrably less risk—eating and having your cake, as it were. Overall, we find deployment velocity to be a critical tool for strong security.
Simplicity: Cloud as an abstraction machine
A common concern about moving to the cloud is that it’s too complex. Admittedly, starting from scratch and learning all the features the cloud offers may seem daunting. Yet even today’s feature-rich cloud offerings are much simpler than prior on-prem environments—which are far less robust.
The perception of complexity comes from people being exposed to the scope of the whole platform, despite more abstraction of the underlying platform configuration. In on-prem environments, there are large teams of network engineers, system administrators, system programmers, software developers, security engineering teams, storage admins, and many more roles and teams. Each has their own domain or silo to operate in.
That loose-flying collection of technologies with its myriad of configuration options and incompatibilities required a degree of artisanal engineering that represents more complexity and less security and resilience than customers will encounter in the cloud.
Cloud is only going to get simpler because the market rewards the cloud providers for abstraction and autonomic operations. In turn, this permits more scale and more use, creating a relentless hunt for abstraction. Like our digital immune system analogy, the customer should see the cloud as an abstraction pattern-generating machine: It takes the best operational innovations from tens of thousands of customers, and assimilates them for the benefit of everyone.
The increased simplicity and abstraction permit more explicit assertion of security policy in more precise and expressive ways applied in the right context. Simply put, simplicity removes more potential surprise—and security issues are often rooted in surprise.
Sovereignty meets sustainability: Global to local
The cloud’s global scale and ability to operate in localized and distributed ways creates three potential pillars of sovereignty, which will be increasingly important in all jurisdictions and sectors. It can intrinsically support the need for national or regional controls, limits on data access, as well as delegation of certain operations, and means for greater portability across services.