Ticketmaster customers in North America are being warned to take action after a hack in May that exposed the personal details of 560 million customers worldwide. Emails were sent to Canadian customers advising them to be vigilant against identity theft and fraud. The company confirmed that names, basic contact details, and encrypted credit card information were stolen. Customers are urged to monitor their accounts for suspicious activity and sign up for identity monitoring services. Ticketmaster has not explained the delay in notifying customers or provided details on the encryption security. While there is a risk of secondary hacking or fraud attempts following a data breach, Ticketmaster is offering identity monitoring services to protect customers for a year. This incident highlights the importance of cybersecurity vigilance and proactive protection measures for online accounts.