General Construction of Chameleon All-but-one Trapdoor Functions

• Main Authors: LIU, Shengli, LAI, Junzuo, DENG, Robert H.
• Format: text
• Language: English
• Published: Institutional Knowledge at Singapore Management University 2011
• Subjects: Lossy trapdoor functions; chameleon ABO-TDFs; Decisional Diffie-Hellman (DDH) assumption; Information Security
• Online Access: https://ink.library.smu.edu.sg/sis_research/1432; https://ink.library.smu.edu.sg/context/sis_research/article/2431/viewcontent/DengRHTrapdoorjisis_2011_vol1_no23_06.pdf
• Institution: Singapore Management University

Lossy trapdoor functions enable black-box construction of public key encryption (PKE) schemes secure against chosen-ciphertext attack [18]. Recently, a more efficient black-box construction of public key encryption was given in [13] with the help of chameleon all-but-one trapdoor functions (ABO-TDFs). In this paper, we propose a black-box construction for transforming any ABO-TDFs into chameleon ABO-TDFs with the help of chameleon hash functions. Instantiating the proposed general black-box construction of chameleon ABO-TDFs, we obtain the first chameleon ABO-TDFs based on the Decisional Diffie-Hellman (DDH) assumption.