Digital cash, also known as e-cash or electronic cash, operates similarly to physical cash but in an electronic form. It allows users to make online transactions without the need for physical currency. Digital cash works by converting real money into a digital format that can be securely transferred between parties over the internet. It typically involves encryption techniques to ensure the security and authenticity of the transactions. Users can store digital cash in digital wallets or accounts and use it for online purchases, money transfers, and other financial transactions.