Audio compression is the lossy compression technique of converting audio signal into an efficiently encoded bitstream that can be decoded to produce a close approximation of the original signal. For the purpose of improving the coding this work attempts to combine psychoacoustic model for perceptual evaluation of audio quality (PEAQ) in BS.1387 with perceptual audio coder. The implementation of this new psychoacoustic model is done using wavelet lifting method instead of FFT; Later the computation of the masking energy for the different bands will be done.

The emphasis of this work is image encoding based on permutation as well as changes that utilize Latin cube as well as Latin square image cipher meant for both color and gray images. Generally, multimedia data are transmitted in the network as well websites, numerous methods have been established for securing the information without any negotiation. Security of information in all the areas is required to ensure that the information sustains privacy, is presentable for recovery as well as governance purposes. These data can be secured by taking CIA (confidentiality, Integrity, and Availability) to realize information like confidentiality about the data that can be reserved as undisclosed from an illegal user of source, the integrity of the data is maintained unaffected for unauthorized font, availability of resources for official personal to retrieve data for access the information. Authentication of a person is by identification, conserving information and its validation of data. Implementing this authentication will store the data in the required format that is either exchanged or transmitted for the internet application. By breaching the misuse of data is can be protected for confidential as well as sensitive data. To achieve security and maintain confidentiality cryptographic methods are implemented.