# Some Security Issues * HTTP sends data in the clear. For real applications that handle sensitive data, we should use HTTPS * authenticate server * encrypt data sent over network via SSL * Session hijacking * Adversary who discovers session ID can take over a session * Checking the IP address of each request helps mitigate this threat, but doesn’t eliminate it * SQL injection * Malicious user enters input that results in execution of an SQL statement other than the intended one * Cross-site scripting * Malicious user gives input that hides a script in content that others will download --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://vikram-bajaj.gitbook.io/cs-gy-6083-principles-of-database-systems/main-1/sql/advanced-sql/accessing-sql-from-a-programming-language/some-security-issues.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.