DataKrypto FHEnom is a fully homomorphic encryption (FHE) library designed for data retention systems in telecommunications environments. The solution enables computations and analysis on encrypted data without requiring decryption, maintaining security throughout the data lifecycle. FHEnom addresses the security challenges faced by Data Retention System (DRS) providers who manage large volumes of Call Detail Records (CDRs) and IP Detail Records (IPDRs) while meeting regulatory compliance requirements. The library provides end-to-end encryption for all data from ingestion through analysis, ensuring that sensitive telecommunications data remains encrypted even during processing. The solution is available as a software development kit (SDK) with APIs for encryption, decryption, and search operations. It supports real-time searches, aggregations, and analysis on encrypted data without decryption. All queries and database replies are automatically encrypted to maintain secure audit logs. FHEnom includes protection mechanisms against unauthorized database triggers, which produce only encrypted output to prevent data breaches by database administrators or malicious actors. The library scales horizontally to handle growing data volumes while maintaining performance in high-demand telecom environments. The solution helps organizations meet data protection regulations including GDPR and NIS2 by ensuring that unauthorized access renders data worthless to malicious actors, as the data remains encrypted throughout its entire lifecycle.