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[No title] These authentication protocols are intended for use primarily by hosts and routers that connect to a PPP network server via switched circuits or dial-up lines, but might be applied to dedicated links as well. The authenticator specifies the authentication protocol to be used in the Configure-Request during Link Establishment phase. It is suggested that the authenticator retry the Indentity Request in the case of an invalid Identity or authentication failure to allow for potential typos on the part of the user. www.ietf.org /rfc/rfc2284.txt   (3296 words)

The NTLM Authentication Protocol and Security Support Provider Authentication -- NTLM provides a challenge-response authentication mechanism, in which clients are able to prove their identities without sending a password to the server. During "normal" (connection-oriented) authentication, all options are negotiated in the first transaction between the client and the server, during the exchange of the Type 1 and Type 2 messages. The keys used in signing and sealing are established as a by-product of the NTLM authentication process; in addition to verifying a client's identity, the authentication handshake establishes a context between the client and server which includes the key(s) needed to sign and seal messages between the parties. davenport.sourceforge.net /ntlm.html   (13397 words)

Authentication Authentication tools provide the ability to determine the identity of a party to an interaction and to ensure that a message came from who it claims to have come from. Authentication is used as the basis for authorization (determining whether a privilege will be granted to a particular user or process), privacy (keeping information from becoming known to non-participants), and non-repudiation (not being able to deny having done something that was authorized to be done based on the authentication). Instead, an "authentication server" creates a collection of "session secrets" (derived from its knowledge of the secrets of the sender and receiver in a particular interchange) that are used by the sender and receiver for authentication of messages during a particular interaction. www.objs.com /survey/authent.htm   (1723 words)

Extensible Authentication Protocol - Wikipedia, the free encyclopedia Extensible Authentication Protocol, or EAP, is a universal authentication framework frequently used in wireless networks and Point-to-Point connections. The protocol has been known from the beginning to be vulnerable to dictionary attacks just like EAP-MD5 but it wasn't until the release of ASLEAP by Joshua Wright in 2003 that people began to argue that LEAP was a serious security liability. It carries a text challenge from the authentication server, and a reply which is assumed to be generated by a security token. en.wikipedia.org /wiki/Extensible_Authentication_Protocol   (1942 words)

RFC 3748 - Extensible Authentication Protocol (EAP) Rather than requiring the authenticator to be updated to support each new authentication method, EAP permits the use of a backend authentication server, which may implement some or all authentication methods, with the authenticator acting as a pass-through for some or all methods and peers. Successful Authentication In the context of this document, "successful authentication" is an exchange of EAP messages, as a result of which the authenticator decides to allow access by the peer, and the peer decides to use this access. The authenticator's decision typically involves both authentication and authorization aspects; the peer may successfully authenticate to the authenticator, but access may be denied by the authenticator due to policy reasons. www.packetizer.com /rfc/rfc.cgi?num=3748   (17405 words)

Announcement: message digest authentication protocol from jose.kahan@w3.org on 1998-12-16 (www-lib@w3.org from ... Announcement: message digest authentication protocol from jose.kahan@w3.org on 1998-12-16 (www-lib@w3.org from October to December 1998) Description: Added support for the message digest authentication protocol as defined in . Note that Apache implements an old version of this authentication protocol. lists.w3.org /Archives/Public/www-lib/1998OctDec/0211.html   (271 words)

Protected Extensible Authentication Protocol - Wikipedia, the free encyclopedia Protected Extensible Authentication Protocol, Protected EAP, or simply PEAP (pronounced "peep"), is a method to securely transmit authentication information, including passwords, over wireless networks. Note that PEAP is *not* an encryption protocol; as with other EAP types it only authenticates a client into a network. PEAP uses only server-side public key certificates to authenticate clients by creating an encrypted SSL/TLS tunnel between the client and the authentication server, which protects the ensuing exchange of authentication information from casual inspection. en.wikipedia.org /wiki/Protected_Extensible_Authentication_Protocol   (754 words)

PPP Extensible Authentication Protocol (EAP)   (Site not responding. Last check: 2007-10-21) The other end of the point-to-point link; the end which is being authenticated by the authenticator. The PPP Extensible Authentication Protocol (EAP) is a general protocol for PPP authentication which supports multiple authentication mechanisms. The MD5-Challenge Type is analagous to the PPP CHAP protocol [3] (with MD5 as the specified algorithm). xml.resource.org /public/rfc/html/rfc2284.html   (3041 words)

[No title]   (Site not responding. Last check: 2007-10-21) The Authentication Protocol Framework The server drives the authentication by telling the client which authentication methods can be used to continue the exchange at any given time. Authentication Protocol Message Numbers All message numbers used by this authentication protocol are in the range from 50 to 79, which is part of the range reserved for protocols running on top of the SSH transport layer protocol. Message numbers of 80 and higher are reserved for protocols running after this authentication protocol, so receiving one of them before authentication is complete is an error, to which the server MUST respond by disconnecting (preferably with a proper disconnect message sent first to ease troubleshooting). www.openssh.com /txt/draft-ietf-secsh-userauth-15.txt   (3156 words)

RADIUS - Wikipedia, the free encyclopedia Remote Authentication Dial In User Service (RADIUS) is an AAA (authentication, authorization and accounting) protocol for applications such as network access or IP mobility. RADIUS is a common authentication protocol utilized by the 802.1x security standard (often used in wireless networks). Although RADIUS was not initially intended to be a wireless security authentication method, it improves the WEP encryption key standard, in conjunction with other security methods such as EAP-PEAP. en.wikipedia.org /wiki/RADIUS   (555 words)

MSN Messenger Protocol - Notification - Authentication When you first connect to a notification server, you are in the "login stage", which involves agreeing on a protocol version to use, authenticating yourself to the MSN server, and possibly being redirected to another notification server if the current one is overloaded. Redirect the client to another login server for the client to authenticate with (note: this server must not be cached). Authentication with MS Passport involves sending HTTPS requests to Microsoft's Passport servers in order to retrieve a passport "ticket", which is then sent to the server you really want to connect to. www.hypothetic.org /docs/msn/notification/authentication.php   (2207 words)

Authentication During the evaluation of the chunk, the authentication code keeps track of the authenticated principal by associating it with the current thread id. When the chunk terminates, the association is removed. The first argument is the peer just authenticated with (either a node or an application), the second is address of the local PLAN interpreter, the third is the function used to send packets to the interpreter, and the fourth may be used to receive data from the interpreter (presented as strings). Finally, the protocol is computationally intensive, and it is often the case that the initiator completes his portion of the calculation (and is thus ready to use the secret) before the receiver. www.cis.upenn.edu /~dsl/PLAN/docs-ocaml/security/security002.html   (2899 words)

Hosting Glossary - Web Hosting Ratings Dictionary of Terms Authentication is used to confirm the identity of the other party involved in the data transmission. A version of HTTP protocol that uses encryption to assure that the traffic between the server and the browser cannot be eveasdropped on. Protocol developed by Netscape to provide encryption for commercial transactions data that should be protected while traveling over the Internet, like credit card numbers. www.webhostingratings.com /glossary.html   (6326 words)

RFC 2284 (rfc2284) - PPP Extensible Authentication Protocol (EAP) RFC 2284 (rfc2284) - PPP Extensible Authentication Protocol (EAP) RFC 2284 - PPP Extensible Authentication Protocol (EAP) The length of this field is derived from the Length field of the Request/Response packet and hence a null is not required. www.faqs.org /rfcs/rfc2284.html   (3161 words)

Protect Against Weak Authentication Protocols and Passwords To complicate the issues, in most environments, these authentication protocols are still hashing the password “just in case a computer only supports the older hash” is contacted. Third, if an insecure authentication protocol is necessary, the methods to protect the password, password hash, and overall network security must be understood. The reason that a new authentication protocol was required was that there was a new network directory service introduced with this version of the operating system. www.windowsecurity.com /articles/Protect-Weak-Authentication-Protocols-Passwords.html   (2475 words)

HTTP/1.1: Header Field Definitions The capabilities and nature of the application-layer communication after the protocol change is entirely dependent upon the new protocol chosen, although the first action after changing the protocol MUST be a response to the initial HTTP request containing the Upgrade header field. The Via general-header field MUST be used by gateways and proxies to indicate the intermediate protocols and recipients between the user agent and the server on requests, and between the origin server and the client on responses. It is analogous to the "Received" field of RFC 822 [9] and is intended to be used for tracking message forwards, avoiding request loops, and identifying the protocol capabilities of all senders along the request/response chain. www.w3.org /Protocols/rfc2616/rfc2616-sec14.html   (14880 words)

CHAP, Challenge Handshake Authentication Protocol The authenticator is in control of the frequency and timing of the challenges. Although the authentication is only one-way, by negotiating CHAP in both directions the same secret set may easily be used for mutual authentication. Since CHAP may be used to authenticate many different systems, name fields may be used as an index to locate the proper secret in a large table of secrets. www.networksorcery.com /enp/protocol/CHAP.htm   (723 words)

Windows 2000 Kerberos Authentication Windows 2000 supports several protocols for verifying the identities of users who claim to have accounts on the system, including protocols for authenticating dial-up connections and protocols for authenticating external users who access the network over the Internet. The Kerberos authentication protocol provides a mechanism for mutual authentication between a client and a server, or between one server and another, before a network connection is opened between them. When the Kerberos protocol is used for authentication, a list of SIDs identifying a security principal and the principal's group membership is transported to the local computer in the authorization data field of a session ticket. www.microsoft.com /technet/prodtechnol/windows2000serv/deploy/confeat/kerberos.mspx   (15126 words)

EAP, Extensible Authentication Protocol In the case where no backend authentication server is used, the EAP server is part of the authenticator. In the case where the authenticator operates in pass-through mode, the EAP server is located on the backend authentication server. The host which is being authenticated by the authenticator. www.networksorcery.com /enp/protocol/eap.htm   (579 words)

An Analysis of the RADIUS Authentication Protocol The Response Authenticator is the is the MD5 hash of the response packet with the associated request packet's Request Authenticator in the Authenticator field, concatenated with the shared secret. The RADIUS protocol has a set of vulnerabilities that are either caused by the protocol or caused by poor client implementation and exacerbated by the protocol. The actual method of identifier generation is not specified by the protocol specification, but the most common method of generating the identifier is to increment a one octet counter for each request, and include the counter value as the identifier. www.untruth.org /~josh/security/radius/radius-auth.html   (4369 words)

Reference.com/Encyclopedia/Point-to-Point Protocol   (Site not responding. Last check: 2007-10-21) In computing, the Point-to-Point Protocol, or PPP, is commonly used to establish a direct connection between two nodes. PPP is commonly used to act as a "layer 2" (the "Data Link" layer of the OSI model) protocol for connection over synchronous and asynchronous circuits, where it has largely superseded an older non-standard protocol (known as SLIP), and telephone company mandated standards (such as X.25). RFC 1994 describes Challenge-handshake authentication protocol (CHAP), preferred for establishing dialup connections with ISPs. www.reference.com /browse/wiki/Point-to-Point_Protocol   (865 words)

Kerberos: The Network Authentication Protocol It is designed to provide strong authentication for client/server applications by using secret-key cryptography. A free implementation of this protocol is available from the Massachusetts Institute of Technology. It provides the tools of authentication and strong cryptography over the network to help you secure your information systems across your entire enterprise. web.mit.edu /kerberos/www   (519 words)

Software: Protected Extensible Authentication Protocol Support  [Cisco Aironet Wireless LAN Client Adapters] - ... PEAP is a new Extensible Authentication Protocol (EAP) IEEE 802.1X authentication type designed to take advantage of server-side EAP-Transport Layer Security (EAP-TLS) and to support various authentication methods, including logon passwords and one-time passwords (OTPs). Several 802.1X authentication types exist, each providing a different approach to authentication while relying on the same framework and protocol—EAP—for communication between a client and an access point. The credentials used for authentication, such as a logon password, are never transmitted without encryption over the wireless medium. www.cisco.com /en/US/products/hw/wireless/ps4555/prod_bulletin09186a0080100194.html   (453 words)

protocol - SWiK   (Site not responding. Last check: 2007-10-21) A protocol is a convention or standard that controls or enables the connection, communication, and data transfer between two computing endpoints. The contents of protocol page and all pages directly attached to protocol will be erased. a URI-compatible identifier scheme and resolution protocol for abstract identifiers, i.e., identifiers that are location-, application-, and transport-independent, and thus can be shared across any number of domains and directories. swik.net /protocol   (459 words)

PAP (Password Authentication Protocol) (Linktionary term) PAP is an authentication protocol that requires users to enter a password before accessing a secure system. However, some authentication systems will fall back to PAP if no better authentication scheme is available. CHAP (Challenge Handshake Authentication Protocol) is an alternative protocol that avoids sending passwords in any form over the wire by using a challenge/response technique, as described under "CHAP (Challenge Handshake Authentication Protocol)." www.linktionary.com /p/pap.html   (204 words)

MySQL AB :: MySQL 5.0 Reference Manual :: B.1.2.3 Client does not support authentication protocol MySQL 5.0 uses an authentication protocol based on a password hashing algorithm that is incompatible with that used by older (pre-4.1) clients. For additional background on password hashing and authentication, see Section 5.7.9, “Password Hashing as of MySQL 4.1”. the error message "Client does not support authentication protocol" is also caused, if the client does not find the proper libmysql.dll. dev.mysql.com /doc/refman/5.0/en/old-client.html   (494 words)

An Attack on the Needham-Schroeder Public-Key Authentication Protocol - Lowe (ResearchIndex) An Attack on the Needham-Schroeder Public-Key Authentication Protocol (1995) Abstract: In this paper we present an attack upon the Needham-Schroeder publickey authentication protocol. An attack on the Needham-Schroeder public-key authentication protocol. citeseer.ist.psu.edu /lowe95attack.html   (397 words)

OATH | initiative for open authentication OATH is an industry-wide collaboration to develop an open reference architecture by leveraging existing open standards for the universal adoption of strong authentication. OATH is comprised of industry leaders working with other standards groups toward the propagation of ubiquitous strong authentication, enabling eBusiness and giving customers the confidence to conduct secure commerce and communication online. An OATH ecosystem consists of devices, chip sets, platforms, applications, integrators, and customers, all working together in a strongly authenticated, highly secure environment. www.openauthentication.org   (135 words)

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