在电子健康记录系统(E-Healthcare Record Systems,EHRS)中,一些方案利用密钥策略ABE(KP-ABE)来保护隐私。由用户指定一个访问策略,密文只有与访问策略相匹配时才能被解密。现有的KP-ABE要求在生成密钥期间必须先确定访问策略,这在EHRS...在电子健康记录系统(E-Healthcare Record Systems,EHRS)中,一些方案利用密钥策略ABE(KP-ABE)来保护隐私。由用户指定一个访问策略,密文只有与访问策略相匹配时才能被解密。现有的KP-ABE要求在生成密钥期间必须先确定访问策略,这在EHRS中是不可行的,因为有时访问策略在密钥生成后才被决定。基于KP-ABE,提出一种灵活访问且模糊可搜索的EHR云服务系统。该系统不仅实现了基于关键字容错的云端密文搜索,而且允许用户重新定义访问策略并为之生成密钥,因此一个精确的访问策略将不再是必需的。最后,证明了该方案的安全性。展开更多
A fuzzy tabu search method is presented in this paper for solving the assignment problem. The proposedfuzzy tabu search technique uses a fuzzy method in the determination of the tabu period and the selection of the ne...A fuzzy tabu search method is presented in this paper for solving the assignment problem. The proposedfuzzy tabu search technique uses a fuzzy method in the determination of the tabu period and the selection of the neigh-borhood. A numerical example is provided to demonstrate the performance of the proposed method.展开更多
文摘在电子健康记录系统(E-Healthcare Record Systems,EHRS)中,一些方案利用密钥策略ABE(KP-ABE)来保护隐私。由用户指定一个访问策略,密文只有与访问策略相匹配时才能被解密。现有的KP-ABE要求在生成密钥期间必须先确定访问策略,这在EHRS中是不可行的,因为有时访问策略在密钥生成后才被决定。基于KP-ABE,提出一种灵活访问且模糊可搜索的EHR云服务系统。该系统不仅实现了基于关键字容错的云端密文搜索,而且允许用户重新定义访问策略并为之生成密钥,因此一个精确的访问策略将不再是必需的。最后,证明了该方案的安全性。
文摘A fuzzy tabu search method is presented in this paper for solving the assignment problem. The proposedfuzzy tabu search technique uses a fuzzy method in the determination of the tabu period and the selection of the neigh-borhood. A numerical example is provided to demonstrate the performance of the proposed method.
