Proxy identity refers to the use of a stolen or fabricated personal identity to impersonate someone else online. Cybercriminals use proxy identities to gain unauthorized access to systems, commit fraud, or bypass security measures. This technique enables attackers to hide their true identity, making it difficult for investigators to trace malicious activities back to the real perpetrator. Proxy identities can be created using stolen credentials, forged documents, or synthetic data. Protecting against proxy identity attacks involves strong authentication methods, regular monitoring for suspicious activity, and user education on safeguarding personal information.