-**note**: In this documentation, php notation is used (`_POST` and `_FILES`),
-but server may be written in any language.
+**note**: In this documentation, php notation is used (`_POST`, `_FILES` and
+ `_COOKIE`), but server may be written in any language.
+
+`_POST["password"]` and `_POST["user"] may contain user name and password. If
+ they are set, access is checked. If they is not set, cookies are checked. If
+ neither are present. If access is correct, cookies are set.
+
+Alternatively, `_COOKIE["syp_user"]` and `_COOKIE["syp_auth"]` may contain user
+ name and md5 of password. If tables prefix is not *syp_*, cookies name are
+ modifier accordingly.