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Two novel actinomycetes, designated strains NEAU-Jh1-3T and NEAU-Jh2-5T, were isolated from muddy soil collected from a riverbank in Jiaohe, Jilin Province, north China. A polyphasic study was carried out to establish the taxonomic positions of these strains. The 16S rRNA gene sequence analysis showed that the two novel isolates exhibited 99.9 % 16S rRNA(More)
It has always been a critical issue to find efficient methods for fast revocation of a user's identity in identity (ID)-based cryptosystems. Unfortunately, none of the previous ID-based cryptography can find a practical way. Libert et al. and Baek et al. respectively propose an ID-based mediated encryption scheme based on the practical ID-based encryption(More)
A nominative signature scheme allows a nominator (or signer) and a nominee (or verifier) to jointly generate and publish a signature in such a way that only the nominee can verify the signature and if necessary , only the nominee can prove to a third party that the signature is valid. In a recent work, Huang and Wang proposed a new nominative signature(More)
Searchable encryption is an important cryptographic primitive that enables privacy-preserving keyword search on encrypted electronic medical records (EMRs) in cloud storage. Efficiency of such searchable encryption in a medical cloud storage system is very crucial as it involves client platforms such as smartphones or tablets that only have constrained(More)
—A new ID-based group signature scheme, in which group managers and group members are all ID-based, is presented in this paper. Our scheme is obtained by using a new way to the construction of group signature schemes and based on an ID-based signature scheme from bilinear pairing. Due to the nice and simple constructive method and the sound properties of(More)
In 1999, Sun et al. proposed a new (t, n) threshold proxy signature scheme based on Zhang's threshold proxy signature scheme. But in 2003 Hsu et al. pointed out that Sun's scheme suffered from a drawback and demonstrated an improvement to counter it. In this paper we point out that Hsu's scheme suffers from an insider attack against their scheme. That is, a(More)
A novel actinomycete, designated strain NEAU-P5T, was isolated from dandelion root (Taraxacum mongolicum Hand.-Mazz.). Strain NEAU-P5T showed closest 16S rRNA gene sequence similarity to Micromonospora chokoriensis 2–19/6T (99.5 %), and phylogenetically clustered with Micromonospora violae NEAU-zh8T (99.3 %), M. saelicesensis Lupac 09T (99.0 %), M. lupini(More)