Sensitive data has to be protected from the public.• A strong encryption algorithm is required for protecting images. • Computing speed is growing, making algorithms vulnerable to attacks. • An enhanced AES-CBC algorithm is evaluated for the encryption proposed. • The algorithm satisfied the required standards and passed all tests.The Advanced Encryption Standard (AES) has become an attractive encryption method for high security and fast implementation. The encryption algorithm is approved as a standard for widely-used communication and data processing units. However, the advance in technology and the introduction of quantum computers made the encryption scheme vulnerable to attack. Different attack procedures are continuously developed to attack end decrypted important and sensitive data. This paper evaluated an enhanced Advanced Encryption System operating in Cipher Block Chaining mode, suggesting a promising solution for resisting future attacks. The approach depends on a time-dependent initialization vector that produces the initialization vector block depending on the epoch time without sharing any encryption key. The evaluation process includes correlation analysis, global and local Shannon entropy analysis, chi-square analysis, histogram analysis, and differential analysis. The results showed that the enhanced encryption scheme is reliable and can resist most cyber-attacks without exposing any encrypted data to the public. The results were compared with previously published and tested algorithms and found to satisfy and exceed the minimum requirement. So, the encryption method can be implemented safely in future communication channels or used in the file encryption process.