Authenticated Encryption (AE) is a symmetric key cryptographic scheme that aims to provide both confidentially and data integrity. This project presents a novel approach a (key distribution) for secret message communication among a group (g) using wrapping technique. In order to increase security to distribute secret message (key) and a generate a key to distribute we introduce a wrapping technique in sponge (where as even absorbing and squeezing function are also used). In this project implementation of secret key distribution is to be done in a group of server-client technology using sponge function. In this process a sponge tool batch file installed in the server. The server will distribute or communicate the secret message to client based on one to one or one too many mapping. With the help of the sponge tool a message has been encrypted and distributes to respective clients. In the client side the decryption batch file to be installed to be verification of secret message authentication. We calculate the time complexity and space complexity for message cryptosystem and generate one time password for key communication which gives more security and can stop hackers form hacking the data.
