8893789
Phoolproof Phishing Prevention
Phishing, or web spoofing, is a growing problem: the Anti-Phishing Working Group (APWG) received almost 14,000 unique phishing reports in August 2005, a 56% jump over the number of reports in December 2004 [3]. For financial institutions, phishing is a particularly insidious problem, since trust forms the foundation for customer relationships, and phishing attacks undermine confidence in an institution. 
 
Phishing attacks succeed by exploiting a user's inability to distinguish legitimate sites from spoofed sites. Most prior research focuses on assisting the user in making this distinction; however, users must make the right security decision every time. Unfortunately, humans are ill-suited for performing the security checks necessary for secure site identification, and a single mistake may result in a total compromise of the user's online account. Fundamentally, users should be authenticated using information that they cannot readily reveal to malicious parties. Placing less reliance on the user during the authentication process will enhance security and eliminate many forms of fraud. 
 
We propose using a trusted device to perform mutual authentication that eliminates reliance on perfect user behavior, thwarts Man-in-the-Middle attacks after setup, and protects a user's account even in the presence of keyloggers and most forms of spyware.We demonstrate the practicality of our system with a prototype implementation.
12549772
Designing an evaluation method for security user interfaces: lessons from studying secure wireless network configuration
: / 28 Ten or 20 years ago, evaluating security products was not as much of a problem as it is today. Systems were managed by people able—and willing—to master the complexities. However, with the proliferation of personal computing devices and network connectivity in the home, systems are now regularly managed by nonexperts. Each system needs to be secured by each user in each home. Therefore designing effective, unbiased evaluation methods for consumer products is one of the first steps in improving both users’ experiences and their security practices. Evaluating the usability of security is a challenge. A common question evaluators face is: “How do I test whether users will configure and use a product securely?” In this article, we outline problems we encountered in evaluating secure wireless network configuration and examine the assumptions many user study methods make, but which may not hold for security.
34732275
Signal extrapolation based on wavelet transform
The Papoulis-Gerchberg (PG) algorithm is used for band-limited signal extrapolation. The PG algorithm is generalized to signals in wavelet subspaces. The generalized PG algorithm is considered for both continuous and discrete time signals. Its convergence is investigated. Numerical examples show its performance.<<ETX>>
40681921
Design of a memory-scalable wavelet-based image codec
The goal of this research is to develop a high performance image codec to be implemented in a digital signal processor (DSP). This DSP chip has only a small amount of internal memory that is fast enough to keep up with the clock cycle of CPU. A new wavelet image codec called the scalable binary description (S-BiD) codec is proposed to achieve this goal. S-BiD, consists of an external wavelet transform and the block-based quantization scheme. The external wavelet algorithm uses a DWT-specific pre-fetching technique to reduce the impact of large access delay of a bulk storage device. Wavelet coefficients are quantized into a set of interleaved multiple bit-streams that describe the three layers in the quantization hierarchy, i.e. blocks, subbands and coefficients, respectively. The codec can generate good compressed images even when the size of the cache memory is less than 4 Kbyte. With a cache memory of 16 Kbyte, its PSNR performance is comparable with all other codecs while its coding time is the shortest. If more resources are available, its performance will be even better.
24413432
A hybrid BMC/OBMC motion compensation scheme
In this paper, we propose a hybrid scheme which incorporates the block motion compensation (BMC) scheme in the overlapped block motion compensation (OBMC) scheme. The main objective of this hybrid scheme is to improve a pure OBMC system with a lower motion bit rate and a lower search complexity while retaining about the same PSNR level. With this scheme, the encoder can determine the block mode under the tradeoff of complexity and visual quality. Furthermore, the motion bit rate can be reduced by smoothing the motion field of BMC blocks during motion search. Experimental results show that the complexity of both the encoder and the decoder is reduced while the visual quality remains as good as the pure OBMC system.
14807272
Progressive compression of 3D graphic models
A progressive coding method which encodes a 3D graphic model into an embedded bit stream is investigated in this research. The coder first encodes the coarsest resolution of the model, and then includes the finer details gradually. The embedding property allows the decoder to terminate the decoding at an arbitrary position in the compressed bit stream, and a more accurate model can be obtained when more bits are decoded. Numerical experiments are provided to demonstrate the excellent rate distortion performance and progressive compression performance of the new method.