A non-disclosure agreement or NDA, also known as a Confidentiality Agreement is a legal contract between at least 2 parties that outlines that the parties wish to share confidential information but with restricted access to that information. The parties agree not to disclose any information covered by the agreement and the contract creates a confidential relationship between the parties to protect confidential or proprietary information or trade secrets. These are a very common first step in international contracting and it is a good idea to have a template document which you are comfortable with which you can suggest using when entering into early stage discussion (or at least cross check where the other party wishes to use their form of NDA).