A bank is a financial institution that accepts deposits from the public and uses those deposits to lend money and engage in other investment activities. Banks play an important role in the financial system and are highly regulated. Regulations include capital requirements to ensure banks maintain sufficient liquid assets. Online or e-banking allows customers to conduct financial transactions through a bank's website rather than visiting a physical branch. Common e-banking services include funds transfers, bill payments, investment transactions, and applications. Cybercrime poses a growing threat to the security of online banking. Common cyberattacks against banks include phishing, malware-based attacks, and distributed denial-of-service attacks. Both customers and banks should take steps to enhance online banking security.