I received a zip with an encrypted file inside.
How do I determine which encryption method was used on it in WinZip 9.0? I've cruised all the menus and options and see no easy way to tell this information.
WinZip 16 has a Tools 'menu/tab'. Open a zip file, select a file from the list, click on the Properties dropdown, and choose 'Selected File'. A popup dialog will appear that has an Encryption Method entry.
In Winzip 9 with an archive open, get File > Properties, then click the Details button. This shows all the details about the zip file and the compressed files within, including encryption.
Each file can be encrypted differently, so you must examine the encryption method for each file to understand the encryption of the archive as a whole. Under each "Local directory entry" section (one per file), pay attention to "filename:" and then the values "Encryption Tag Version" (e.g., AE-2) and "Encryption Key Bits" (e.g., 256).
Here is an example entry: