A New Public-Key Cryptosystem over a Quadratic Order with Quadratic Decryption Time.

Sachar Paulus Tsuyoshi Takagi A New Public-Key Cryptosystem over a Quadratic Order with Quadratic Decryption Time. 263-272 2000 13 J. Cryptology 2 http://link.springer.de/link/service/journals/00145/bibs/0013002/00130263.html db/journals/joc/joc13.html#PaulusT00