@inproceedings{kiayias_pehlivanoglu_2009, 
  title={On the security of a public-key traitor tracing scheme with sublinear ciphertext size}, 
  DOI={10.1145/1655048.1655050}, 
  publisher={ACM Press}, 
  author={Kiayias and Pehlivanoglu}, 
  year={2009}
  }