Breaking Pairing-Based Cryptosystems Using η T Pairing over GF(397)
Breaking Pairing-Based Cryptosystems Using η T Pairing over GF(397)
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DOI:
10.1007/978-3-642-34961-4_5
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发表时间:
2012-12
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影响因子:
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通讯作者:
Takuya Hayashi;Takeshi Shimoyama;N. Shinohara;T. Takagi
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文献类型:
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作者:
Takuya Hayashi;Takeshi Shimoyama;N. Shinohara;T. Takagi
In this paper, we discuss solving the DLP overGF(36·97) by using the function field sieve (FFS) for breaking paring-based cryptosystems using theηTpairing overGF(397). The extension degree 97 has been intensively used in benchmarking tests for the implementation of theηTpairing, and the order (923-bit) ofGF(36·97) is substantially larger than the previous world record (676-bit) of solving the DLP by using the FFS. We implemented the FFS for the medium prime case, and proposed several improvements of the FFS. Finally, we succeeded in solving the DLP overGF(36·97). The entire computational time requires about 148.2 days using 252 CPU cores.