How to disable "module verification failed: signature and/or required key missing - tainting kernel" message?

[Anupam Kapoor]

>>>>> [2015-11-02T11:27:10+0530]: "Nan Xiao" (nan-xiao):
,----[ nan-xiao ]
| When the vendor Linux system enable "kernel module signature
| verification" mechanism,
| if install your own built module, the kernel will complain:
| 
| module verification failed: signature and/or required key missing
| - tainting kernel
`----
disable 'CONFIG_MODULE_SIG' in your kernel. more info available in
Documentation/module-signing.txt 

-- 
kind regards
anupam