ENCODING has been replaced by BIBTEX_INPUT_ENCODING and OUTPUT_ENCODING
@inproceedings{Xia13, Author = {D. Xiao}, Booktitle = {Proceedings of 4th Innovations in Theoretical Computer Science}, Date-Added = {2014-08-11 09:39:48 +0000}, Date-Modified = {2014-08-11 09:40:41 +0000}, Pages = {67-86}, Title = {Is privacy compatible with truthfulness?}, Year = {2013}}