HTTP Cookie


An HTTP cookie is a small piece of data sent from a website and stored on the user's computer by the user's web browser while the user is browsing.

A website, also written as web site, is a collection of related web pages, including multimedia content, typically identified with a common domain name, and published on at least one web server.

A web browser is a software application for retrieving, presenting, and traversing information resources on the World Wide Web.

The Hypertext Transfer Protocol is an application protocol for distributed, collaborative, and hypermedia information systems.

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Cookies were designed to be a reliable mechanism for websites to remember stateful information or to record the user's browsing activity.

What is Http Cookie | Browser Cookie | Internet Cookie by HowTo


They can also be used to remember arbitrary pieces of information that the user previously entered into form fields such as names, addresses, passwords, and credit-card numbers.

A password, sometimes called a passcode, is a memorized secret used to confirm the identity of a user.


Cookies perform essential functions in the modern web.


Perhaps most importantly, authentication cookies are the most common method used by web servers to know whether the user is logged in or not, and which account they are logged in with.


Without such a mechanism, the site would not know whether to send a page containing sensitive information, or require the user to authenticate themselves by logging in.


The security of an authentication cookie generally depends on the security of the issuing website and the user's web browser, and on whether the cookie data is encrypted.


Security vulnerabilities may allow a cookie's data to be read by a hacker, used to gain access to user data, or used to gain access to the website to which the cookie belongs.


Tracking cookies, and especially third-party tracking cookies, are commonly used as ways to compile long-term records of individuals' browsing histories — a potential privacy concern that prompted European and U.S. lawmakers to take action in 2011.


European law requires that all websites targeting European Union member states gain "informed consent" from users before storing non-essential cookies on their device.

The European Union is a politico-economic union of 28 member states that are located primarily in Europe.


Google Project Zero researcher Jann Horn describes ways cookies can be read by intermediaries, like Wi-Fi hotspot providers.

Wi-Fi or WiFi is a technology that allows electronic devices to connect to a wireless LAN network, mainly using the 2.4 gigahertz UHF and 5 gigahertz SHF ISM radio bands.

Google is an American multinational technology company specializing in Internet-related services and products.


He recommends to use the browser in incognito mode in such circumstances.

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