A Non-Disclosure Agreement (NDA), also known as a confidentiality agreement, is a contract between two parties where one shares sensitive information and the other party promises to keep it confidential. Confidential information is often sensitive, technical, commercial, or valuable in nature (e.g., trade secrets or proprietary information).
Both parties sign the Confidentiality Agreement, creating a binding contract to keep the information secret. Be sure you understand how to write an NDA before drafting your own.