The study of this work was focused on the process of protecting CRM systems in the conditions of the transition of software, which is the main part of CRM systems from a monolithic architecture to an architecture based on microservices. This article explores a migration strategy using the Strangler Fig pattern that facilitates the incremental adoption of microservices while maintaining compatibility with the existing monolith. A key aspect of a migration strategy is choosing a framework, such as the Framework for Microservices Migrations (FMM), that standardizes development practices and helps decompose monoliths into manageable components. Communication between microservices and the monolith is facilitated through a REST API that ensures seamless interaction. The integration of microservices is achieved through the implementation of DTOs (Data Transfer Objects) and API gateways, which ensures smooth data exchange between components. The article emphasizes the importance of dependency and configuration management in microservices, emphasizing the need for encapsulation and autonomy. In addition, the research examines the use of Curcuit Breaker patterns to effectively handle failures and maintain system stability during the migration process. Microservices, implemented as APIs, demand robust authentication methods such as cryptographic API keys and tokens. Security Assertion Markup Language (SAML) or OpenID with OAuth 2.0 are suggested solutions to enhance data security. Centralized architecture for authorization policies is crucial to regulate access across all microservices, while standardized token-based authentication ensures platform-neutral interoperability. However, decentralized authorization enforcement at each microservice entry point may lead to inconsistent security policies. Moreover, access to APIs handling confidential data necessitates authentication tokens with digital signatures or from trusted sources. Access control policies should be meticulously defined and enforced, with considerations for token expiration and scope limitations. The abstract underscores the significance of centralized access management and the challenges posed by anonymous connections bypassing API gateways.
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