There are a number of platforms that provide end-to-end encrypted file sharing. Tresorit provides end-to-end encrypted cloud storage service with easy, risk-free collaboration. It uses AES-256 encryption on the client side before your data is uploaded and also relies on a patented encryption method for sharing files with others. Crypho is a file sharing and group chat platform with end-to-end encryption. All messages and files are encrypted before they are transferred over the network and can only be decrypted when they reach their intended recipient. Crypho uses a combination of proven encryption schemes and key management techniques, all hidden from the end-user including Crypho’s staff. Other services like, Peerio and arXshare also offer end-to-end encrypted file sharing services.