Authors P Kamal KumarDepartment of Computer Science Engineering (Cyber Security), GATES Institute of Technology, Gooty, Andhra Pradesh, IndiaG ChaitraDepartment of Computer Science Engineering (Cyber Security), GATES Institute of Technology, Gooty, Andhra Pradesh, IndiaM VardhanDepartment of Computer Science Engineering (Cyber Security), GATES Institute of Technology, Gooty, Andhra Pradesh, IndiaB KartheekDepartment of Computer Science Engineering (Cyber Security), GATES Institute of Technology, Gooty, Andhra Pradesh, India Abstract The rapid growth of cybercrime has significantly increased the importance of digital forensics in criminal investigations, where digital text evidence such as emails, instant messages, documents, log files, and electronic records plays a crucial role in identifying and prosecuting cyber offenders. Ensuring the authenticity, integrity, and confidentiality of digital evidence is essential, as even minor modifications can compromise its admissibility and reliability in legal proceedings. Conventional forensic systems primarily focus on data encryption to protect confidentiality during storage and transmission but often lack robust mechanisms for verifying evidence integrity before restoration or analysis. This limitation creates opportunities for evidence tampering, unauthorized modifications, and integrity violations, thereby reducing the credibility of forensic investigations. To address these challenges, this paper proposes Twin Route Forensics, a secure framework for digital text evidence authentication and integrity verification. The proposed framework integrates user authentication, cryptographic encryption, secure evidence storage, and hash-based integrity verification into a unified forensic workflow. Before encrypted evidence is decrypted or restored, the system performs integrity validation by comparing the generated cryptographic hash values with the original reference hash to ensure that the evidence has not been altered during transmission or storage. Only authenticated users with valid credentials and successfully verified evidence are permitted to access the original digital content. This dual-layer security mechanism significantly enhances evidence reliability while protecting against unauthorized access and data tampering. The proposed framework improves the trustworthiness of digital forensic investigations, strengthens the chain of custody, and supports the admissibility of digital evidence in judicial proceedings. Furthermore, the system offers a scalable, efficient, and practical solution for law enforcement agencies, forensic laboratories, cybersecurity professionals, and legal institutions seeking secure digital evidence management. The proposed Twin Route Forensics framework contributes to modern digital forensic practices by ensuring confidentiality, authenticity, integrity, and reliable restoration of digital text evidence throughout the forensic investigation lifecycle. Keywords Digital Forensics Twin Route Forensics Digital Text Evidence Evidence Authentication Integrity Verification Cryptographic Hash Functions SHA-256 Encryption Digital Evidence Security Cybercrime Investigation Chain of Custody Digital Evidence Management Cybersecurity Secure Evidence Storage Forensic Computing. Citation of this Article P Kamal Kumar, G Chaitra, M Vardhan, & B Kartheek. (2026). Twin Route Forensics: A Secure Framework for Digital Text Evidence Authentication and Integrity Verification. Current Journal of Engineering and Science Research. 3(6), 20-29. Article DOI: https://doi.org/10.47001/CJESR/2026.306003 Licence Copyright (c) 2026 Current Journal of Engineering and Science Research. 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