![]() ![]() ![]() Now we can allow an inline tag to execute by adding our random nonce value in the nonce attribute of the script tag: The random nonce value should only be used for a single HTTP request. You should use a cryptographically secure random token generator to generate a nonce value. NOTE: We are using the phrase: rAnd0m to denote a random value. Here's how one might use it with the CSP script-src directive: Using a nonce is one of the easiest ways to allow the execution of inline scripts in a Content Security Policy (CSP). The two most important things to remember when using a nonce, especially with respect to ( CSP), is that we only use our nonce once (for one request), and the nonce should be so random that no one could guess it. In cryptography a nonce may be used to prevent replay attacks, where the attacker captures and replays a previosuly used message. If you were a spy, you might come up with a nonce as a code word to authenticate a rendezvous. The word nonce can be defined as a word or phrase that is intended for use only once. ![]() A nonce is a randomly generated token that should be used exactly one time. ![]()
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