Polynomial-Based Secret Sharing Scheme for Text, Image and Audio

Confidential information can be shared in a group with secret sharing scheme where no single user can retrieve the secret. Only few or more in the group together only can restore the secret. The secret could be in the form of numeric, text, image, audio, etc. There are different methods to deal with the above said secrets. In this paper, Lagrange’s interpolation method is applied in the formation and restoration of shares on numeric, text, image and audio. Constant coefficients and random coefficients are used while considering the coefficients of polynomial and dissimilarity between shares, and secret is measured using Pearson correlation coefficient. © 2020, The Institution of Engineers (India).