Electronic file sending method

A non-transitory computer-readable medium having instructions stored thereon which, when executed by at least one processor, cause the at least one processor to perform operations comprising:

• receiving, at a receiving apparatus, an encrypted electronic file sent from a sending apparatus, the encrypted electronic file encrypted by the sending apparatus using a password that is first encrypted by the sending apparatus and sent from the sending apparatus to a server without going through the receiving apparatus along with a receiver identifier identifying a receiver of the encrypted electronic file, the encrypted electronic file received at the receiving apparatus without going through the server;
• receiving a token from the server;
• sending, to the server, an encrypted token and a public key, the encrypted token being the token encrypted by the receiving apparatus using a private key corresponding to the public key, wherein the server uses the public key to decrypt the token for verification and associates the public key with the receiver;
• receiving, from the server, a second encrypted password, the second encrypted password being the password second encrypted by the server;
• second decrypting the second encrypted password to obtain the password;
• and
• decrypting the encrypted electronic file using the password.

A non-transitory computer-readable medium having instructions stored thereon which, when executed by at least one processor, cause the at least one processor to perform operations comprising:

• first encrypting a password necessary to decrypt an encrypted electronic file;
• sending the first encrypted password from a sending apparatus to a server that second encrypts the password and sends the second encrypted password to a receiving apparatus, the first encrypted password being sent from the sending apparatus to the server without going through the receiving apparatus;
• sending the encrypted electronic file from the sending apparatus to the receiving apparatus without the encrypted electronic file going through the server, wherein the receiving apparatus decrypts the encrypted electronic file using the password;
• and sending, from the sending apparatus to the server, a receiver identifier identifying a receiver of the encrypted electronic file, wherein the server sends a token to the receiving apparatus, receives, from the receiving apparatus, an encrypted token and a public key, the encrypted token being the token encrypted by the receiving apparatus using a private key corresponding to the public key, and decrypts the encrypted token using the public key for verification.

A device comprising:

• at least one processor;
• and
• a memory having instructions stored thereon which, when executed by the at least one processor, cause the at least one processor to perform operations for providing, from the device to a receiving apparatus, a password necessary to decrypt an encrypted electronic file sent from a sending apparatus to the receiving apparatus without going through the device, the operations comprising:
• receiving a first encrypted password sent from the sending apparatus to the device without going through the receiving apparatus, the first encrypted password being the password first encrypted by the sending apparatus,
• receiving, from the sending apparatus, a receiver identifier identifying a receiver of the encrypted electronic file,
• sending a token to the receiving apparatus,
• receiving, from the receiving apparatus, an encrypted token and a public key, the encrypted token being the token encrypted by the receiving apparatus using a private key corresponding to the public key,
• decrypting the encrypted token using the public key for verification,
• first decrypting the first encrypted password to obtain the password, and
• sending a second encrypted password to the receiving apparatus, the second encrypted password being the password second encrypted by the at least one processor using the public key, wherein the receiving apparatus receives the encrypted electronic file encrypted by the sending apparatus using the password and sent from the sending apparatus without going through the device, uses the private key to decrypt the second encrypted password to obtain the password, and decrypts the encrypted electronic file using the password.