Abstract: An end-to-end mechanism is disclosed herein for transporting encrypted messages over hypertext transport protocol (HTTP) sent to a group of recipients. In particular, the disclosed mechanism receives a message (e.g., as an input from a user) and encrypts that message using an encryption mechanism with a key unique to a particular user and to the message (e.g., different messages are encrypted using different keys). The encrypted message is then stored in a generated object along with other metadata needed for message processing. Once the object is generated, it is signed and encoded into a binary representation that is then sent to a server. The server system receives the binary representation and decodes it back into the object. The metadata of the object is then used to route the message to the correct recipient applications for decryption.

Abstract: An objective of the present invention is to obtain a mutual authentication method in which mutual authentication is carried out securely and conveniently. In order to achieve the above objective, in the mutual authentication process, a private key K0, being an initial value, is stored in a client and a server (Pc0, Ps0). The client generates a random number R, calculates secret data C and authentication data A, and transmits the data items to the server (Pc1). The server receives the authentication data A and the secret data C from the client, and generates a random number Q, calculates secret data S, and authentication data B and returns the data items, as well as updating the private key K0 with a private key K1 (Ps1). The client receives from the server the authentication data B and the secret data S, generates the random number R, calculates secret data C2, authentication data A2, and returns the data items to the server, and updates the private key K0 with the private key K1(Pc2).