The threat of losing the privacy of stored images due to data breaches and malicious attacks has increased the security concerns to improve the protection of storage systems. However, the inherent features of images and the manual nature of the current encryption applications have proven to limit the prevention factors of encryption from being used more heavily in real-time. To overcome these limitations, several studies have highlighted the prominent effects of transparent encryption; nevertheless, the run-time processing in the current implementations of transparent cryptographic file systems is still limited and inefficient. In this paper, we describe the design and implementation of Crypto filter driver, a fully transparent and secure cryptographic file system for Windows platform. It can dynamically realize the processes of writing and reading file images on local disk, and transparently encrypt and decrypt them on the fly. The experiments are performed to measure the performance of the crypto filter driver over images of cryptographic service write and read. Besides the robust security level provided by the new crypto filter driver, the results showed high performance.