What Individuals Can Do Now as Data Breaches Mount

The article begins by noting that large-scale data breaches caused by unauthorized access to companies and services have been occurring frequently in recent years. Leaked information can include names, addresses, and email addresses, as well as login credentials and credit card details, and once data has been exposed it is difficult to recover, which is a serious problem.

The most important measure individuals can take is password management. Set long, hard-to-guess passwords for each site, and to avoid the burden of remembering many different passwords, use a password manager. Make the master password long and hard to guess, and combine it with features such as biometric authentication and automatic re-locking.

In addition, enabling two-step/two-factor authentication or passkeys is recommended. These make unauthorized logins using only a password more difficult, and passkeys are introduced as an authentication method with high resistance to phishing. For services you use infrequently, consider removing stored information or deleting accounts to narrow the scope of what you must manage, which also reduces the risk of harm.

For credit cards, avoid reusing the same card across registrations or storing card details on sites, and turn on 3D Secure settings and usage notifications to help detect unauthorized use early. If you receive a breach notification, check the scope of the leak, investigate whether any unauthorized use has occurred, contact the service operator, and beware of phishing that abuses the notification—access services via official apps or bookmarks.

In conclusion, while it is difficult to completely prevent data breaches through corporate measures alone, practicing good password management, using multi-factor authentication, reviewing the services you use, and configuring card notifications can reduce the risk of secondary damage.