The article is devoted to the development of a cryptographic data protection method for corporate cloud environments based on the Zero Trust concept, taking into account the requirements for performance, scalability, and predictable latency. The introduction substantiates the relevance of the topic in the context of the transition of corporate systems to cloud services, the growth of cyber threats, and the need to combine cryptographic strength with practical operational constraints. The section reviewing recent studies examines the regulatory and scientific foundation of the research, covering both international and national information security standards, Zero Trust approaches, access control models, and encryption methods. On this basis, the paper formulates the problem of the absence of an integrated method that would simultaneously consider the threat model, separation of trust levels, key management, and time constraints typical of high-load systems. The research part shows that homomorphic encryption, despite its advantages for processing encrypted data, cannot be used as the basic storage protection mechanism because of substantial computational overhead. Its use is justif
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