However there some many prerequisites for using a the website. The download link can only be used once. Nafue works like this. You want to share a very imported file, you have to encrypt it on your side using a a password generated using Pbkdf2 key before uploading it to the s3 storage service. Once this is done, the website will provide you with a one-time-use link to share with the recipient. After the first download, or 24 hours, the link and the encrypted file are both deleted. Remember, the receiver must enter the same password to decrypt and recover the file. No one but the sharer and receiver know what the actual file is. If the file were to land in some wrong person’s hand, they would take some years before cracking the 256AES encryption. It’s still work in progress, so chime in with your comments and suggestions. To dig into the code, check out his repository on Github, which also has instructions to build and run it if you’d like to do your own version.