Senthil Kumar, K. and Malathi, D. 2018. A Novel method to represent Access Tree structure by Context Free Grammar with and-or graph in Key Policy based Attribute based Encryption. International Journal of Engineering & Technology. 7, 4.10 (Oct. 2018), 396–398. DOI:https://doi.org/10.14419/ijet.v7i4.10.20946.