Access control method and system and storage medium

The invention discloses an access control method and system and a storage medium, which are used for reducing the load of a server and reducing the access delay of a client. The method comprises the following steps: when an access request sent by a first client is received, judging whether the access request carries a unique authentication code or not; when the access request does not carry the unique authentication code, extracting identity information in the access request; calculating an ID value corresponding to the identity information; whether the identity information in the access request exists in a white list or not is judged according to an ID value corresponding to the identity information, the ID value serves as an index of the identity information in the white list, and the ID value and the identity information are stored in an array mode; and when the identity information in the access request exists in the white list, responding to the access request of the first client. By adopting the scheme