The is an unofficial utility (originally developed by community members like bp2008 ) that generates a security code based on your device's serial number and system date.
Losing access to your security system can be a major headache, but the (often associated with version 1.1 or 1.1.0.1) is a well-known community utility designed to help users regain access to older Hikvision devices. hikvision password reset helper 1101 download upd