There is no formal registration-type process for securing rights to a trade secret, as that would defeat the value of the IP itself: the fact that it is a secret. Generally, a trade secret may consist of any formula, pattern, device or compilation of information that is used in a business and that may give an advantage over competitors who do not know the trade secret. If the valuable IP-or any portion of it-is unlikely to be identified or deduced through use or deconstruction of an invention, it might be a good idea to keep that portion a trade secret rather than detailing it to the public in a patent application or otherwise.
Most importantly: Trade secrets must be secret. Anything that is public knowledge or general known in an industry cannot be claimed as a trade secret. Anything that is completely disclosed by the marketed goods cannot be a trade secret. Only people who are pledged or otherwise obligated to secrecy should know the details or even the existence of a trade secret.