In current cloud computing system, large amounts of sensitive data are shared to other cloud users. To keep these data confidentiality, data owners should encrypt their data before outsourcing. We choose proxy reencry...In current cloud computing system, large amounts of sensitive data are shared to other cloud users. To keep these data confidentiality, data owners should encrypt their data before outsourcing. We choose proxy reencryption （PRE） as the cloud data encryption technique. In a PRE system, a semi-trusted proxy can transform a ciphertext under one public key into a ciphertext of the same message under another public key, but the proxy cannot gain any information about the message. In this paper, we propose a certificateless PRE （CL-PRE） scheme without pairings. The security of the proposed scheme can be proved to be equivalent to the computational Dire- Hellman （CDH） problem in the random oracle model. Compared with other existing CL-PRE schemes, our scheme requires less computation cost and is significantly more efficient. The new scheme does not need the public key certificates to guarantee validity of public keys and solves the key escrow problem in identity-based public key cryptography.展开更多
随着信息技术在自然资源数字化场景领域的广泛应用,信息安全的重要性日益凸显。聚焦商用密码技术在自然资源数字化场景中的应用实践,深入剖析其关键作用与现实意义。通过调研分析、技术研究及实地验证等方法,详细阐述了透明加解密、软...随着信息技术在自然资源数字化场景领域的广泛应用,信息安全的重要性日益凸显。聚焦商用密码技术在自然资源数字化场景中的应用实践,深入剖析其关键作用与现实意义。通过调研分析、技术研究及实地验证等方法,详细阐述了透明加解密、软件开发工具包(Software Development Kit,SDK)集成等关键商用密码技术在自然资源数字化场景中的实践应用。研究表明,SM2、SM3、SM4、SM9等算法,以及数据库透明加密、安全认证网关等技术在保障用户身份认证、数据存储与传输安全等方面成效显著,有效提升了自然资源数字化场景统一服务平台的安全性与合规性,为商用密码技术在自然资源数字化应用场景中的深入应用提供了系统与实践经验,有望推动该领域信息安全水平的进一步提升。展开更多
基金the National Natural Science Foundation of China(No.61133014)
文摘In current cloud computing system, large amounts of sensitive data are shared to other cloud users. To keep these data confidentiality, data owners should encrypt their data before outsourcing. We choose proxy reencryption （PRE） as the cloud data encryption technique. In a PRE system, a semi-trusted proxy can transform a ciphertext under one public key into a ciphertext of the same message under another public key, but the proxy cannot gain any information about the message. In this paper, we propose a certificateless PRE （CL-PRE） scheme without pairings. The security of the proposed scheme can be proved to be equivalent to the computational Dire- Hellman （CDH） problem in the random oracle model. Compared with other existing CL-PRE schemes, our scheme requires less computation cost and is significantly more efficient. The new scheme does not need the public key certificates to guarantee validity of public keys and solves the key escrow problem in identity-based public key cryptography.
文摘随着信息技术在自然资源数字化场景领域的广泛应用,信息安全的重要性日益凸显。聚焦商用密码技术在自然资源数字化场景中的应用实践,深入剖析其关键作用与现实意义。通过调研分析、技术研究及实地验证等方法,详细阐述了透明加解密、软件开发工具包(Software Development Kit,SDK)集成等关键商用密码技术在自然资源数字化场景中的实践应用。研究表明,SM2、SM3、SM4、SM9等算法,以及数据库透明加密、安全认证网关等技术在保障用户身份认证、数据存储与传输安全等方面成效显著,有效提升了自然资源数字化场景统一服务平台的安全性与合规性,为商用密码技术在自然资源数字化应用场景中的深入应用提供了系统与实践经验,有望推动该领域信息安全水平的进一步提升。
