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The protocols used to encrypt account names and passwords are called authentication protocols The two most popular protocols are and Kerberos?
CHAP (Challenge Handshake Authentication Protocol) The CHAP provides protection against palyback attack by the peer also requires both the client and server.
AH and ESP protocol works on security in network layer?
The AH (Authentication Header) protocol and the ESP (Encapsulating Security Payload) protocol both function within the network layer. They are part of the IPSec (Internet Protocol Security) standard.
Main differences between WPA and WPA2?
Wi-Fi Protected Access 2 (WPA2) builds upon WPA, which makes them very similar. Both support identical Extensible Authentication Protocol (EAP) types in an enterprise environment, as well as allowing pre-shared keys (PSKs). Group key transmission is performed by the two-way handshake, while the four-way handshake is used for unicast generation. The main differences are as follows: - WPA requires Temporal Key Integrity Protocol (TKIP), and it supports Advanced Encryption System (AES), which provides a stronger encryption - WPA2 requires AES, and it does not support TKIP
What are protocol numbers for HTTP and HTTPS?
Secure Socket Layer SSL is called the abbreviations, Chinese condom after Layer protocols Layer. Use this agreement, you of all the submitted data will first encrypted netease mail, then submit to, which can effectively prevent hackers steal your username, password and communication content, guarantee the safety of your personal content. SSL (Secure Socket Layer,) For the development, to safeguard Netscape in the security of data transmission, on the Internet, using data Encryption (Encryption) technology, which can ensure data on the network The transmission process on won't be intercepted and eavesdropping. At present the specification of generic for 40 bit of safety standards, the United States launched 128 bit myriads of higher security Standard, but limit exit. As long as 3.0 version above of I.E. or Netscape browser can support SSL. The current version for 3.0. It has been widely used in between Web browser and server the identity authentication and encryption data transmission. SSL protocol is located in the TCP/IP protocol and various application layer protocol for data communications between provide security support. SSL Protocol can be divided into two layers: SSL Record Protocol (SSL Protocol) : it establish Record in reliable transfer Protocol (such as TCP) above, for high-rise protocols that provide the data package, compression, encryption basic function such as support. SSL Protocol Handshake Handshake agreement (SSL) : it is based in SSL record above used in actual agreement before the start of the data transmission, telecommunications identity authentication, the parties hereto negotiate encryption algorithm, exchange encryption keys, etc. SSL protocols that provide service mainly include: 1) the authentication user and server to ensure data sent to the correct client and server; 2) encrypted data to prevent data midway is stolen; 3) maintain the integrity of the data to ensure data in a transmission process does not be changed. SSL protocol workflow: Server authentication stage: 1) the client to the server sends a start information "Hello" to begin a new session connection; 2) server according to customer's information to determine whether to need to generate new master key, if need be, in response to customer "server will contain information Hello" the information needed to generate main key; 3) the server respond customer according to receive information, produce a primary key, and after public key encryption of servers to the server. 4) server resume the main key, and back to the customer a with the main authentication information, this key authentication server let customers. User authentication stage: before that, the server has passed the authentication, this one phase customers for customers mainly completes authentication. After the authentication server to send a question to the customer, the customer return (digital) signed questions and their public keys to the server, which provide certification. From the service provided by SSL protocol and its workflow can see, SSL protocol operation is based on business to consumer information confidential promises, it goes against consumer to businesses. In e-commerce, because run primary stage of electronic commerce enterprise are mostly credibility higher big company, so this problem is still not fully exposed. But with the development of e-commerce, the small and medium-sized companies are also involved in electronic payment process, so that the single problem is more and more outstanding authentication. Although in SSL3.0 through digital signatures and digital certificate can realize the browser and the Web server both identity authentication, but SSL protocol still has some problems, for example, can only provide transactions between customers and server authentication, involving both sides of the many electronic transactions, SSL protocol and the safety of the parties can't coordinate between the transmission and trust relationship. In this case, Visa and MasterCard two big credit card male organization established SET agreement for on the net the credit card payment provides global standards. http://www.nicerosettastone.com/
What does a SSH Keygen actually do?
An SSH Keygen is used to generate, manage, and convert authentication keys for SSH authentication. With an SSH Keygen tool, a user can create passphrase keys for both SSH protocol version 1 and 2.
What is ipsec?
(IP SECurity) A security protocol from the IETF that provides authentication and encryption over the Internet. Unlike SSL, which provides services at layer 4 and secures two applications, IPsec works at layer 3 and secures everything in the network. Also unlike SSL, which is typically built into the Web browser, IPsec requires a client installation. IPsec can access both Web and non-Web applications, whereas SSL requires workarounds for non-Web access such as file sharing and backup. IPsec is supported by IPv6. Since IPsec was designed for the IP protocol, it has wide industry support and is expected to become the standard for virtual private networks (VPNs) on the Internet.
What is the purpose of TLS authentication?
TLS Authentication ensures that both a server and client know who they are communicating with.
Write VPN technologies supported by Windows 2000?
Microsoft Windows 2000-based virtual private networking (VPN) supports Internet-industry standards technology to provide customers with an open interoperable VPN solution. Microsoft is committed to IETF (Internet Engineering Task Force) standards-track-based technology such as Internet Protocol Security (IPSec) and Layer 2 Tunneling Protocol (L2TP) as well as Point-to-Point Tunneling Protocol (PPTP)a proven published informational RFC that is supported in multiple interoperable third-party products.PPTP provides simple-to-use, lower-cost VPN security. Unlike IPSec technology, PPTP is compatible with Network Address Translators (NAT) and supports both multi-protocol and multicast environments. It also combines standard user password authentication with strong encryption without requiring the complexity and expense of public key infrastructure (PKI).IPSec provides advanced security for VPN but was not designed to address critical remote access requirements such as User Authentication and Address Assignment. In addition, it does not support multi-protocol or multicast (including some routing protocols). It is applicable primarily to IP-only, unicast-only situations.L2TP in combination with IPSec is the onlystandards-track technology that addresses these remote access VPN requirements while leveraging IPSec for encryption. L2TP currently retains the same IETF standards-track status as IPSec.Third-party IPSec-only implementations that do not use L2TP with IPSec are using non-standard proprietary technologies that can lock customers into closed solutions.
What kind of authentication method is kerberos?
It's a mutual authentication; it verifies both user and sender of the ticket using symmetric keys.
Which authentication model is used to ensure that both client and server authenticate each other before allowing access?
Mutual Authentication
What purpose does a namespace serve in computing?
It provides a digital map for both the name server and the network service so that a directory can be used to perform a NSPR / network service protocol.
What is the difference between wireless access protocol and wireless application protocol?
both are same...
