A Confidentiality Agreement (also known as a Non-Disclosure Agreement or NDA) is a legally binding contract between two or more parties that outlines the confidential information that is to remain private between the parties involved. The agreement is used to protect the confidential information of one or both parties involved in a particular transaction or project. Generally, the agreement will outline what information should be kept confidential, by whom, and for how long. A Confidentiality Agreement can protect any type of information, such as trade secrets, financial information, proprietary information, and other confidential information shared between the parties. There are three main types of Confidentiality Agreements: Unilateral, Bilateral, and Mutual. Unilateral agreements are used when one party (the disclosed) is providing confidential information to another party (the recipient). Bilateral agreements are used when two parties are exchanging confidential information. Mutual agreements are used when two or more parties are exchanging confidential information and have mutual obligations to each other.