@inproceedings{Chaum85:0,
  title = {Showing Credentials Without Identification: SIgnatures Transferred Between Unconditionally Unlinkable Pseudonyms},
  author = {David Chaum},
  year = {1985},
  url = {http://link.springer.de/link/service/series/0558/bibs/0219/02190241.htm},
  researchr = {https://researchr.org/publication/Chaum85%3A0},
  cites = {0},
  citedby = {0},
  pages = {241-244},
  booktitle = {EUROCRYPT},
}