Patent ID: 9131114
Filing Date: 2015-09-08
Classification: H04L,H04N

Abstract:
1. A method for encrypting content, the method comprising: encrypting by using a plurality of different encrypting schemes to a single content to provide encrypted content; and adding encryption information to the encrypted content; wherein the encryption information indicates ones of the plurality of different encrypting schemes for subsequent use in decrypting corresponding portions of the encrypted content, and wherein the content is encrypted after an authentication to a connected apparatus succeeds, wherein the single content comprises a plurality of frames, each frame comprises a plurality of fields, and each frame or each field comprises a plurality of lines, wherein the encrypting comprises performing encryption by applying a first encryption method to a first line and a second encryption method to a second line through the remaining lines among the lines which form the frame or field, and wherein the adding encryption information comprises adding first information indicating the first encryption method which is used in the first line to the first line and adding second information indicating the second encryption method which is used in the second line to the second line.