Browsing by Author "Huang, Ting-Yu"

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A TRANSPOSITIONAL ADVANCED ENCRYPTION STANDARD (AES) RESISTS 3-ROUND SQUARE ATTACK
(2009-05-01)
Yeh, Yi-Shiung
;
Lee, Chen-Yu
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Huang, Ting-Yu
;
Lin, Chu-Hsing
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資訊工程學系
In this paper, an advanced encryption standard (AES) variant is proposed that is resistant to linear cryptanalysis, differential cryptanalysis, and the square attack. We replace some procedures in the round function of AES and take the bit as the operation unit to foil the square attack. Also, we apply linear cryptanalysis and differential cryptanalysis to the proposed cipher. The proposed cipher is shown to be superior to AES in many aspects.
Adjustable and robust methods for polarization-dependent focusing
(2013-07-01)
Schmid, David
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Huang, Ting-Yu
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Hazrat, Shiraz
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Dirks, Radhika
;
Hosten, Onur
We present two methods for the precise independent focusing of orthogonal linear polarizations of light at arbitrary relative locations. Our first scheme uses a displaced lens in a polarization Sagnac interferometer to provide adjustable longitudinal and lateral focal displacements via simple geometry; the second uses uniaxial crystals to achieve the same effect in a compact collinear setup. We develop the theoretical applications and limitations of our schemes, and provide experimental confirmation of our calculations. (C) 2013 Optical Society of America
Structural Binary CBC Encryption Mode
(2009-05-01)
Yeh, Yi-Shiung
;
Huang, Ting-Yu
;
Lin, Han-Yu
;
資訊工程學系
;
Department of Computer Science
A block cipher is a kind of symmetric encryption algorithm that operates on blocks of fixed length, often 64 or 128 bits. It transforms blocks of plaintext into blocks of ciphertext of the same length under the provided secret key. A common characteristic of currently Widely used modes of operation such as CBC, CFB and OFB is the sequential procedure. i.e., the encryption/decryption algorithm can not start to process until the previous operation finished, which is considered to be inefficient in multi-processor structures. In this paper, we combine CBC mode of operation and the binary free data structure to propose a new structural binary CBC encryption mode allowing parallelized computing. A significant property of the proposed mode of operation is independent branch operations. When applied in multi-processor structures, different branch operations can make effective use of CPUs to perform in parallel, which will lead to shorter computing time and greatly improve the overall performance.