4. Confidentiality
4.1 Each party undertakes that, it shall not, for a period of five years after the date of this letter, disclose to any person any confidential information concerning the business, affairs, customers, clients, suppliers, plans, intentions or market opportunities, the operations, processes, product information, know-how, designs, trade secrets or software of the other party (‘confidential information’)
4.2 No party shall use the other party’s confidential information for any purpose other than the purpose contained within this letter and evaluation and negotiation of the proposed Agreement.