Hello there, since the only option is to modify the C source code of nginx/src/http/modules/ngx_http_secure_link_module.c to support hexadecimal md5 encoding in addition to base64 encoding besides specifying an optional ttl value to add to expiration time (e.g. 3600 sec in example below) I made a patch to provide this functions in addition to the documented behavior. It can be used with a variby ntr0py - Nginx Mailing List - English