A trade secret is a formula, pattern, physical device, idea, process, or compilation of information that provides economic value because it is not generally known and is protected through reasonable secrecy measures. Examples of trade secrets include recipes, manufacturing techniques, and computer algorithms. To protect a trade secret, companies restrict access to the information, limit who knows it, have employees sign non-disclosure agreements, and mark written material as proprietary. Trade secrets can potentially last indefinitely as long as the information remains secret, do not require registration, and provide worldwide protection without public disclosure. However, they can be lost through employee departure, independent discovery, or failure to maintain adequate secrecy.