SecureFlag

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Contents

Overview

The secure flag is an option that can be set by the application server when sending a new cookie to the user within an HTTP Response. The purpose of the secure flag is to prevent cookies from being observed by unauthorized parties due to the transmission of a the cookie in clear text.

To accomplish this goal, browsers which support the secure flag will only send cookies with the secure flag when the request is going to a HTTPS page. Said in another way, the browser will not send a cookie with the secure flag set over an unencrypted HTTP request.

By setting the secure flag, the browser will prevent the transmission of a cookie over an unencrypted channel.

Setting the Secure Flag

Testing for the Secure Flag

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