Chi-Jeng Chang

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Hardware (NIST) selected the Rijndael Algorithm as a new Advanced Encryption Standard[1] in 2000, many hardware implementation of AES for high-throughput design[2][3][4][5] have been proposed. They typically unroll the loops with AES algorithm followed by pipelining of 128-bit data-path to achieve the order of tens Giga bit per second (Gbps). These designs(More)
BACKGROUND AND PURPOSE Although chronic inflammatory bowel disease (IBD) is rare in Asian children, increasing numbers of pediatric patients with chronic IBD worldwide have been noted in recent years. This study was conducted to delineate the trend in incidence and clinical patterns of childhood IBD in Taiwan. METHODS All children admitted to National(More)
This paper presents an application of AES (Advanced Encryption Standard) operations in image encryption and decryption. The encrypted cipher images always display the uniformly distributed RGB pixels. It looks like the noise of TV without signals. However, in some cases the ECB mode operation may appear a kind of pattern in the area related to the portion(More)
This paper presents the applications of Advanced Encryption Standard (AES) in audio and video signals. Like the ciphertext is completely different from the plaintext in AES operation, so the encrypted audio or visual signal should have the same effect. The experiments reveal the encrypted signals are so much different from the original ones that they become(More)
—this paper presents an 8-bit AES direct FPGA hardware implementation of CFB/OFB operations without using the Block RAM (BRAM). The 8-bit AES core is then embedded through a microcontroller to interface with Bluetooth wireless for performing encryption or decryption. Two sets of the embedded systems are configured together to experiment the AES operation of(More)
This paper presents an image encryption instead of text to observe the modified ECB mode operations in AES processing. If a plaint image contains some groups of identical colors, then the encrypted cipher image may appear some kinds of patterns at the related areas. This is a limitation of AES in ECB mode. To overcome the limitation, a straight forward(More)
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