Secure File Upload Handling Certificate

Awarded for completing Secure File Upload Handling and passing its exam, demonstrating the ability to identify the four distinct risk categories a file upload feature introduces, validate file type by content signature rather than extension or declared type alone, store uploaded files outside any executable location, replace an untrusted original filename with a generated identifier, apply size and quantity limits proportionate to a feature's legitimate use case, scan uploaded content before it reaches other users while understanding scanning's honest limits, serve files back with accurate content type and disposition settings, and enforce explicit, per-retrieval access control on uploaded content.