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Is my CloudStor FileSender data secure? Can I encrypt the data?

FileSender supports full end-to-end encryption (AES-CBC SHA-256), assuring nobody (not even AARNet) except you and your recipient ever see the files.

Basically your file is encrypted in your web browser and then the encrypted file is uploaded. The recipient downloads the encrypted file and then decrypts the file in the browser (provided the correct password is entered). Additional software is not necessary.

To use encryption for added security, tick the ‘encryption’ box on the upload page. Come up with a key (password) that you can easily remember and contact the receiver after uploading and sending your files to pass on the key. We advise you do this via a different channel than e-mail, for example by telephone or SMS. As soon as the receiver enters this key they can download the files. The encryption and decryption of files is done by the browser during uploading and downloading.

Note that encryption upload speed depends on a combination of the web browser, OS, CPU and RAM of the uploader and downloader.