An interpretation for the entropy of a black hole
  We investigate the meaning of the entropy carried away by Hawking radiations from a black hole. We propose that the entropy for a black hole measures the uncertainty of the information about the black hole forming matter's precollapsed configurations, self-collapsed configurations, and inter-collapsed configurations. We find that gravitational wave or gravitational radiation alone cannot carry all information about the processes of black hole coalescence and collapse, while the total information locked in the hole could be carried away completely by Hawking radiation as tunneling. 
Baocheng Zhang, Qing-yu Cai, Ming-sheng Zhan, and Li You
gr-qc hep-th quant-ph