Hierarchical access control is an important and traditional problem in information security. In 2001, Wu et.al. proposed an elegant solution for hierarchical access control by the secure-filter. Jeng and Wang presented an improvement of Wu et. al.’s method by the ECC cryptosystem. However, secure-filter method is insecure in dynaminc access control. Lie, Hsu and Tripathy, Paul pointed out some ...

Secure two-party computation has been an interesting theoretical concept for decades, but until recently has been considered too expensive for practical applications. With significant advances in the design and implementation of secure protocols, secure computation is becoming feasible in practice. However, with the notable exceptions of biometric identification and secure auctions, the researc...

Hierarchical access control is an important and traditional problem in information security. In 2001, Wu et.al. proposed an elegant solution for hierarchical access control by the secure-filter. Jeng and Wang presented an improvement of Wu et. al.’s method by the ECC cryptosystem. However, secure-filter method is insecure in dynaminc access control. Lie, Hsu and Tripathy, Paul pointed out some ...

the purpose of establishing foreign reserves account in iran was mainly to secure iran's economy from the oil's price changes. it was to compensate for oil price reduction. but foreign reserves account withdrew excessively and did not allocate it optimally. that's why; it went for away from its practical purpose. this study focuses on the use of official assessment pattern to rev...

The present study examined three sets of questions about secure base provision in the context of the family, including (1) relations between inter-parental perceptions of secure base provision and parents' adult romantic attachment and marital satisfaction, (2) interrelations among family members' perception of secure base provision, and (3) links between both adolescents' and parents' percepti...

E cient ID based key sharing schemes are desired world widely for secure communica tions on Internet and other networks The Key Predistiribution Systems KPS are a large class of such key sharing schemes The remarkable property of KPS is that in order to share the key a participant should only input its partner s identi er to its secret KPS algorithm Although it has a lot of advantages in terms ...

This study explores the use of phone and secure messaging via an online patient portal in mediating the communication between patients and their healthcare providers. In analyzing the messages handling processes, we found that although both phone and secure messages were answered in similar manners, the interplay of the frontand back-end roles in collaborative work resulted in patients’ prefere...

For 25 years we have watched and nurtured the growth of B2C eCommerce with first time consumers, however consumer surveys are indicating that we are losing ground with previous customers who are vowing not to return. Consumers state that they perceive a lack of confidence and trust that the vendor will provide a safe and secure environment. In the early stages of development much research into ...

We consider anonymous secure communication, where parties not only wish to conceal their communications from outside observers, but also wish to conceal the very fact that they are communicating. We consider the bus framework introduced by Beimel and Dolev [2], where messages are delivered by a bus traveling on a random walk. We generalize this idea to consider more than one bus. We show that i...