The notion of accountable authority introduced by Goyal (Crypto 2007) in identity-based encryption (IBE) setting is a novel approach to mitigate the (inherent) key escrow problem in identity based cryptosystems. As far as we know, the (inherent) key escrow problem also exists in attribute based encryption (ABE), for example ciphertext policy ABE (CP-ABE). In this paper, the concept of accountab...

RSS (Really Simple Syndication) has been introduced as a response to the need of efficient information distribution and subscription. However, the current RSS standard does not provide privacy preservation and confidentiality protection. Independently, the emergence of ABE (Attribute-based Encryption) provides us a brand new cryptographic primitive for access control. This paper sets out to exa...

The commonly used asynchronous bounded delay (ABD) network models assume a fixed bound on message delay. We propose a probabilistic network model, called asynchronous bounded expected delay (ABE) model. Instead of a strict bound, the ABE model requires only a bound on the expected message delay. While the conditions of ABD networks restrict the set of possible executions, in ABE networks all as...

Users are inclined to share sensitive data in a remote server if no strong security mechanism is in place. Searchable encryption satisfies the need of users to execute a search on encrypted data. Previous searchable encryption method such as “public key encryption with keyword search (PEKS)” restricted the data access to certain users, because only the assigned users were able to search on the ...

Acetone-butanol-ethanol (ABE) fermentation by clostridia has shown promise for industrial-scale production of biobutanol. However, the continuous ABE fermentation suffers from low product yield, titer, and productivity. Systems analysis of the continuous ABE fermentation will offer insights into its metabolic pathway as well as into optimal fermentation design and operation. For the ABE ferment...

Acetone-butanol-ethanol (ABE) production from renewable resources has been widely reported. In this study, Clostridium butyricum EB6 was employed for ABE fermentation using fermentable sugar derived from treated oil palm empty fruit bunch (OPEFB). A higher amount of ABE (2.61 g/l) was produced in a fermentation using treated OPEFB as the substrate when compared to a glucose based medium that pr...

This study investigated biological activities including antioxidative stress, anti-inflammation, and anti-insulin resistance of Anoectochilus burmannicus aqueous extract (ABE). The results showed abilities of ABE to scavenging DPPH and ABTS free radicals in a dose-dependent manner. Besides, ABE significantly reduced nitric oxide (NO) production in the lipopolysaccharide (LPS)-treated RAW 264.7 ...

Attribute-based encryption (ABE) is a promising cryptographic primitive that allows one-to-many encryption. In such a system, users' private keys are linked to their access rights. We note that if a user can generate a new private key for a portion of his/her access right, this could potentially lead to some undesirable situations, which violate the access control policy. Interestingly, to date...

The introduction of Private Finance Initiative in the United Kingdom has prompted the need for quality whole life cost information. This in turn has led to a search for new innovative methods for producing whole life cost information. The research reported in this paper is a part of an overall approach being developed for whole life costing of building services. A particular problem identified ...

In this paper we propose generic conversions for transforming a chosen-plaintext (CPA) secure attribute-based encryption (ABE) to a chosen-ciphertext (CCA) secure ABE. The only known generic conversion, to the best of our knowledge, was presented by Goyal et al. in ACM-CCS 2006, which itself subsumes the well-known IBE-to-PKE conversion by Canetti, Halevi, and Katz proposed in Eurocrypt 2004. T...