Financial Firm Strategies for Secure Public Cloud Adoption

Why Ramit Sharma of NatWest Group Embraces the Shared Responsibility Model Mathew J. Schwartz (euroinfosec) • September 18, 2025

As financial services organizations continue to embrace public cloud infrastructure, they must carefully manage an array of security challenges, said Ramit Sharma, engineering manager at NatWest Group.

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In addition to dealing with regulatory concerns, including complying with the EU's Digital Operational Resilience Act, or DORA, he advocates using a shared responsibility model that carefully defines what falls into the provider's domain, as well as what the customer is tasked with securing. Approaches will vary depending on the type of cloud being used - infrastructure as a service, platform as a service, or software as a service.

"When you are hosting your applications on your on-premises servers, you own everything - the data infrastructure, servers, networking," Sharma said. "It's very important - when ...