function bbp_default_intercept() {
	static $rand = null;

	// Generate a new random and unique string
	if ( null === $rand ) {

		// If ext/hash is not present, compat.php's hash_hmac() does not support sha256.
		$algo = function_exists( 'hash' )
			? 'sha256'
			: 'sha1';

		// Old WP installs may not have AUTH_SALT defined.
		$salt = defined( 'AUTH_SALT' ) && AUTH_SALT
			? AUTH_SALT
			: (string) wp_rand();

		// Create unique ID
		$rand = hash_hmac( $algo, uniqid( $salt, true ), $salt );
	}

	// Return random string (from locally static variable)
	return $rand;
}