They say, "send me your public key". I do send them said key, and they send me back a PGP encrypted file. When I go to open it, PGP complains an tells me that I lack the private keys to open the file.

PGP runs into problems when it tries to encrypt or decrypt files that have names longer than 200 characters. When PGP attempts to decrypt the files, a buffer overflow causes it to crash.

Take control of your privacy with PGP encryption. This guide explains how to use PGP to secure emails, protect sensitive files, and keep your communications safe from hackers and surveillance.

Users without PGP NetShare can copy files into protected folders, but those files are not encrypted until an authorized user modifies the file or re-encrypts the folder.