Multi-Format Data Encryption and Decryption with AES Cipher Block Chaining in Python
DOI:
https://doi.org/10.61402/crj.v2i2.348Keywords:
Enkripsi, Kriptografi, AES, Keamanan Data, Brute ForceAbstract
The digital era has transformed how people interact, work, and store information, making data a critical asset for individuals and organizations. Threats such as theft, eavesdropping, and unauthorized access drive the need for effective security solutions. Encryption is a key technology for protecting sensitive data, with the Advanced Encryption Standard (AES) established by NIST as a widely accepted standard. AES is a symmetric key cryptography algorithm that supports key sizes of 128, 192, and 256 bits, offering flexibility in security levels. This study focuses on implementing the AES algorithm in Cipher Block Chaining mode for encrypting and decrypting multi-format data (e.g., PDF, Word, PowerPoint, Excel, images, videos) using Python. The software development approach follows the Object-Oriented Analysis and Design (OOAD) methodology, consisting of three main stages: object requirements analysis, object-oriented design, and object-oriented implementation. The resulting application, 'FileGuard', successfully encrypts and decrypts various document types efficiently, providing high security against brute force attacks. Performance evaluations show that encryption and decryption processing times vary depending on document size, with AES proving to be a reliable algorithm for maintaining data security.
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