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In computer science, a session identifier, session ID or session token is a piece of data that is used in network communications (often over HTTPS) to identify a session, a series of related message exchanges. Session identifiers become necessary in cases where the communications infrastructure uses a stateless protocol such as HTTP. For example, a buyer who visits a seller's website wants to collect a number of articles in a virtual shopping cart and then finalize the shopping by going to the site's checkout page. This typically involves an ongoing communication where several webpages are requested by the client and sent back to them by the server. In such a situation, it is vital to keep track of the current state of the shopper's cart, and a session ID is one way to achieve that goal.
A session ID is typically granted to a visitor on their first visit to a site. It is different from a user ID in that sessions are typically short-lived (they expire after a preset time of inactivity which may be minutes or hours) and may become invalid after a certain goal has been met (for example, once the buyer has finalized their order, they cannot use the same session ID to add more items).
As session IDs are often used to identify a user that has logged into a website, they can be used by an attacker to hijack the session and obtain potential privileges. A session ID is usually a randomly generated string to decrease the probability of obtaining a valid one by means of a brute-force search. Many servers perform additional verification of the client, in case the attacker has obtained the session ID. Locking a session ID to the client's IP address is a simple and effective measure as long as the attacker cannot connect to the server from the same address, but can conversely cause problems for a client if the client has multiple routes to the server (e.g. redundant internet connections) and the client's IP address undergoes Network Address Translation.
Examples of the names that some programming languages use when naming their cookie include JSESSIONID (Java EE), PHPSESSID (PHP), and ASPSESSIONID (Microsoft ASP).
a session identifier, sessionID or session token is a piece of data that is used in network communications (often over HTTPS) to identify a session, a...
attacker would need to know the id of the victim's log-in session. When the victim visits the link with the fixed sessionid, however, they will need to log...
main methods used to perpetrate a session hijack. These are: Session fixation, where the attacker sets a user's sessionID to one known to them, for example...
perform the replay because on a new run the sessionID would have changed. Session IDs, also known as session tokens, are one mechanism that can be used...
full handshake, the server sends a sessionid as part of the ServerHello message. The client associates this sessionid with the server's IP address and...
length flag is set. Tunnel ID Indicates the identifier for the control connection. SessionID Indicates the identifier for a session within a tunnel. Ns (optional)...
sends a serverHello message that includes the chosen cipher suite and the sessionID. Next the server sends a digital certificate to verify its identity to...
server, to update it on the status of an active session. "Interim" records typically convey the current session duration and information on current data usage...
id Software LLC (/ɪd/) is an American video game developer based in Richardson, Texas. It was founded on February 1, 1991, by four members of the computer...
shell exits, because it is the "session leader" (its sessionid equals its process id), the corresponding login session ends, and the shell sends SIGHUP...
as any user, any .ASPX page is then loaded, and by requesting both the sessionID of the user login and the correct View State directly from the server...
designated as the sessionid, a volatile group representing the logon session, allowing access to volatile objects associated to the session, such as the display...
implementation issues with poorly designed CAPTCHA systems: reusing the sessionID of a known CAPTCHA image, and CAPTCHAs residing on shared servers. Sometimes...
OpenID is an open standard and decentralized authentication protocol promoted by the non-profit OpenID Foundation. It allows users to be authenticated...
identified by the process group ID of the session leader. POSIX prohibits the change of the process group ID of a session leader. The system call setpgid...
potentially sensitive information from the referrer URL, such as the sessionID, and can reduce the chance of phishing by indicating to the end user that...
generator, which allowed an attacker to hijack the sessionID of a user and take over their session. Kamkar released a patch and once fixed, released exploit...
id Tech 7 is a multiplatform proprietary game engine developed by id Software. As part of the id Tech series of game engines, it is the successor to id...
Stateful Session Beans are business objects having state: that is, they keep track of which calling client they are dealing with throughout a session and of...
2009: http://www.ethi-usmappingmission.com/179410/296134.html?*session*id*key*=*session*id*val* Archived 2012-10-10 at the Wayback Machine Leviero, Anthony...
E. Dan and Jerm met in 2008 when Jerm was dropping off recording session files at ID Labs for work he had been doing with Wiz Khalifa. Jerm interned at...
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