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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
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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
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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
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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
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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