Can cookies be accessed by other sites?

Short answer: you can’t. Ad networks and google can do this because thousands of sites embed code that allows them to set and retrieve cookies from their own domains (e.g. analytics. google com). They can assign a unique identifier to a user and track them across different sites.

How do I transfer cookies from one website to another?

Cookies are only accessible to a single domain that they are set to….Then the steps are simple:

1. add to site A a hidden iframe to site B.
2. send B’s cookie to A using window. postMessage.
3. store the received cookie in A’s cookie.

Are cookies website specific?

Cookies are small files which are stored on a user’s computer. They are designed to hold a modest amount of data specific to a particular client and website, and can be accessed either by the web server or the client computer.

Who can access cookies?

Most of the time, when a cookie does store personal information, this information is coded in such a way that it is unreadable to any third party who happens to access your cookie folder. The only computer that can read and decode the information is the server that created the cookie in the first place.

Can I read a cookie from another domain?

It cannot read cookie of the other website/domain. This security is ensured by browser. Cookie is not shared among different browsers. Means, one browser cannot read the cookie stored by another browser even if it is same domain.

How can a cookie be accessed from a domain other than it was set for?

There’s no way to let a cookie be accessible from another 2nd-level domain, so other.com will never receive a cookie set at site.com . site.com (a dot before site.com ) also works the same way, allowing access to the cookie from subdomains.

Are cookies cross browser?

In short, a browser cookie will not be read across browsers as long as you quit a browser before using another.

Can a website have multiple cookies?

Cookies take up space both in the HTTP stream when loading a webpage and on the computer that loads it. Most browsers put a limit on the number of cookies any one domain can set. Cookies have a small size limit, so developers sometimes opt to send their cookie data in multiple cookies.

Can cookies track browsing history?

Cookies are the most common method of tracking users across multiple websites. Third-party tracking cookies store data about visited websites to log the user’s browsing history over a long period of time. They land on your device via embedded image files (advertising banners or counting pixels).