新进化论

摘要： VPNs can use both symmetric and asymmetric forms of cryptography. Symmetric cryptography uses the same key for both encryption and decryption, while asymmetric cryptography uses separate keys for encr... 阅读全文

摘要： Encapsulating Security Payload (ESP)ESP is the second core IPsec security protocol. In the initial version of IPsec, ESP provided only encryption for packet payload data. Integrity protection was prov... 阅读全文

摘要： Integrity Protection ProcessThe first step of integrity protection is to create a hash by using a keyed hash algorithm, also known as a message authentication code (MAC) algorithm. A standard hash alg... 阅读全文

摘要： NIST‘s requirements and recommendations for the configuration of IPsec VPNs are:If any of the information that will traverse a VPN should not be seen by non-VPN users, then the VPN must provid... 阅读全文

摘要： 一、NIST概况 　　美国国家标准与技术研究院(以下简称NIST)直属美国商务部，从事物理、生物和工程方面的基础和应用研究，以及测量技术和测试方法方面的研究，提供标准、标准参考数据及有关服务，在国际上享有很高的声誉。　　NIST的主要任务是：(1)建立国家计量基准与标准；(2)发展为工业和国防服务的测试技术；(3)研制与销售标准服务；(4)提供计量检定和校准服务；(5)参加标准化技术委员会制定标准... 阅读全文