Uploading files is an essential function for a number of applications and services. They are commonplace in CMS systems and insurance sites, healthcare portals and messaging apps. However allowing hackers to upload files indefinitely could expose your customers' personal information to security breach.
To ensure secure uploading and downloading, a solution is required that verifies uploaded files' contents against an approved whitelist of file types and scans for viruses. This is especially crucial if you manage customer information and must be compliant with laws like HIPAA or GDPR for EU citizens.
A reliable file uploading system will also ensure that the data is encrypted both while in flight and at rest. This will prevent the data from being read by third parties. It also helps protect your document management system company from costly lawsuits and fines if you aren't in compliance.
Additionally you should ensure that you only keep uploaded files in designated storage locations on your server, database or cloud storage service. Then, provide a link to the file to the user. This will lower the risk that hackers will gain access to your server and also steal important information from customers.