As an improtant cryptographic scheme, signcryption scheme has been widely used in applications since it could provide both of signature and encryption. With the development of the certificateless public key cryptograp...As an improtant cryptographic scheme, signcryption scheme has been widely used in applications since it could provide both of signature and encryption. With the development of the certificateless public key cryptography （CLPKC）, many certificatelss signcryption （CLSC） schemes using bilinear pairing hve been proposed. Comparated other operations, the bilinear pairing operaion is much more compulicated. Therefore, CLSC scheme without bilinear pairing is more suitable for applications. Recently, Jing et al. proposed a CLSC scheme without bilinear pairing and claimed their scheme is secure against two types of adversaries. In this paper, we will show their scheme provide neither unforgeability property nor confidentiality property. To improve security, we also propose a new CLSC scheme without pairing and demonstrate it is provably secure in the random oracle model.展开更多
为解决当前车联网中匿名认证的效率问题,利用椭圆曲线上的双线性对的性质,提出一种批量匿名认证方案。通过路侧单元节点(RSU)与车辆共同生成签名,有效减轻了VANET认证中心的负担进而提高认证效率,并且增加了攻击者提取密钥的难度,并在...为解决当前车联网中匿名认证的效率问题,利用椭圆曲线上的双线性对的性质,提出一种批量匿名认证方案。通过路侧单元节点(RSU)与车辆共同生成签名,有效减轻了VANET认证中心的负担进而提高认证效率,并且增加了攻击者提取密钥的难度,并在随机预言模型中给出其安全性证明。分析表明,该方案能够满足多种安全需求,计算开销明显降低,认证效率得到有效提高。因此,该方案在计算性能受限的物联网(Io T,Internet of things)环境中,有着重要的理论意义与应用价值。展开更多
基金This research was supported by the National Natural Science Foundation of China （Grant No. 61202447）, Natural Science Foundation of Hebei Province of China （F2013501066）, Northeastern University at Qinhuangdao Science and Technology Support Program （xnk201307）.
文摘As an improtant cryptographic scheme, signcryption scheme has been widely used in applications since it could provide both of signature and encryption. With the development of the certificateless public key cryptography （CLPKC）, many certificatelss signcryption （CLSC） schemes using bilinear pairing hve been proposed. Comparated other operations, the bilinear pairing operaion is much more compulicated. Therefore, CLSC scheme without bilinear pairing is more suitable for applications. Recently, Jing et al. proposed a CLSC scheme without bilinear pairing and claimed their scheme is secure against two types of adversaries. In this paper, we will show their scheme provide neither unforgeability property nor confidentiality property. To improve security, we also propose a new CLSC scheme without pairing and demonstrate it is provably secure in the random oracle model.
文摘为解决当前车联网中匿名认证的效率问题,利用椭圆曲线上的双线性对的性质,提出一种批量匿名认证方案。通过路侧单元节点(RSU)与车辆共同生成签名,有效减轻了VANET认证中心的负担进而提高认证效率,并且增加了攻击者提取密钥的难度,并在随机预言模型中给出其安全性证明。分析表明,该方案能够满足多种安全需求,计算开销明显降低,认证效率得到有效提高。因此,该方案在计算性能受限的物联网(Io T,Internet of things)环境中,有着重要的理论意义与应用价值。
