Efficient Signcryption Key Encapsulation without Random Oracles
Efficient Signcryption Key Encapsulation without Random Oracles
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DOI：
10.1007/978-3-642-01440-6_6
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发表时间：
2009-04
期刊：
影响因子：
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通讯作者：
Fagen Li;Masaaki Shirase;T. Takagi
中科院分区：
文献类型：
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作者：
Fagen Li;Masaaki Shirase;T. Takagi
Recently, Tan proposed an insider secure signcryption key encapsulation mechanism (KEM) and an insider secure signcryption tag-KEM. His schemes are secure without random oracles (in the standard model). In this paper, we proposed a more efficient construction for signcryption KEM and tag-KEM. We prove their semantic security and existential unforgeability in the standard model. Compared to Tan’s schemes, our corresponding schemes have 20% faster speed in the key encapsulation, 33% faster speed in the key decapsulation, 33% shorter public key, 60% shorter private key, and |p| bits shorter ciphertext.
