IBE

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Overview In order to compile the code, you need to install the PBC library and GMP library. PBC library is a C library providing low-level routines for pairing-based cyptosystems. I use SHA1 function as my hash function, which generate 160-bit long numbers.

Compile Code After you install both PBC library and GMP library, you could compile the code by following instruction:

gcc bf_4_1.cc sha1.cc -o test -I /usr/local/include/ -L /usr/local/lib/ -Wl,-rpath /usr/local/lib -l pbc -l gmp

gcc bf_4_2.cc sha1.cc -o test1 -I /usr/local/include/ -L /usr/local/lib/ -Wl,-rpath /usr/local/lib -l pbc -l gmp

Sample Review (1)Setup:Take secruity parameter K(QBITS,RBITS),return the system parameter ans master key of the PKG.The system parameters include a description of a finite message space M, and a dscription of a finite ciphertext space C. The system parameters will be publicly known,while the master-key will be known only to the PKG. (2)Extract:The receiver extracts the corresponding private key from the PKG. (3)Encrypt:The sender will generate a ciphertext based on the receiver ID. (4)Decrypt:The receiver will use his private key to get the message digest.

Test the code: I use gtest to test the code. I have write a Makefile for testing code. Before run the test, please comment the main function in the corresponding target file in order to make the test work.

Ran Zhao ran.zhao@yale.edu