@techreport{hasan:hal-03034994, TITLE = {{Privacy Preserving Reputation Systems based on Blockchain and other Cryptographic Building Blocks: A Survey}}, AUTHOR = {Hasan, Omar and Brunie, Lionel and Bertino, Elisa}, URL = {https://cnrs.hal.science/hal-03034994}, TYPE = {Research Report}, INSTITUTION = {{University of Lyon ; INSA-Lyon ; CNRS - LIRIS - UMR5205}}, YEAR = {2020}, MONTH = Nov, PDF = {https://cnrs.hal.science/hal-03034994/file/pprs-survey-20201112.pdf}, HAL_ID = {hal-03034994}, HAL_VERSION = {v1}, }