A List of Ephemeral File Sharing Services The article provides a list of ephemeral file sharing services and recommends encrypting files locally before uploading, even if the service is trusted. It includes a brief tutorial on using OpenSSL to encrypt files with 256-bit AES and decrypt them, along with a reference to an analysis of HTTPS usage on some of these sites. Contributions welcome. It's a good idea to encrypt your files locally before sending them out, even if you trust the service. Here's a short how-to. Encrypt with 256 bit AES: openssl enc -aes-256-cbc -salt -in