Insecure Deserialization

The video tutorial discusses the use of serialized objects in applications that rely on the client to maintain state. It highlights the risk of insecure deserialization, where serialized data can be tampered with, leading to privilege escalation, such as changing a user role from 'user' to 'admin' via cookie manipulation. The tutorial concludes by emphasizing the importance of encrypting serialized data to protect against such attacks.

Explain the concept of privilege escalation in the context of serialized data.

What is the only way to protect against insecure deserialization attacks?