WordPress at a glance
filter is not described

secure_auth_cookie filter-hook . WP 3.1.0

Filters whether the connection is secure.

Usage

add_filter( 'secure_auth_cookie', 'filter_function_name_9765', 10, 2 );
function filter_function_name_9765( $secure, $user_id ){
	// filter...

	return $secure;
}
$secure(true/false)
Whether the connection is secure.
$user_id(int)
User ID.

Where the hook is called

wp_set_auth_cookie()
wp-includes/pluggable.php 846
$secure = apply_filters( 'secure_auth_cookie', $secure, $user_id );

Where the hook is used (in WP core)

Does not used.