| Chen Jianhong (陈剑洪),Chen Kefei,Long Yu.[J].高技术通讯(英文),2012,18(3):275~280 |
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| Identity-based threshold key-insulated signature |
| Revised:August 10, 2010 |
| DOI：10.3772/j.issn.1006-6748.2012.03.010 |
| 中文关键词: |
| 英文关键词: threshold key-insulated, signature, random oracle model |
| 基金项目: |
| Author Name | Affiliation | | Chen Jianhong (陈剑洪) | | | Chen Kefei | | | Long Yu | |
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| 中文摘要: |
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| 英文摘要: |
| Due to the compromise of the security of the underlying system or machine storing the key, exposure of the private key can be a devastating attack on a cryptosystem. Key insulation is an important technique to protect private keys. To deal with the private (signing) key exposure problem in identity-based signature systems, we propose an identity-based threshold key-insulated signature (IBTKIS) scheme. It strengthens the security and flexibility of existing identity-based key-insulated signature schemes. Our scheme’s security is proven in the random oracle model and rests on the hardness of the computational Diffie-Hellman problem in groups equipped with a pairing. To the best of our knowledge, it is the first IBTKIS scheme up to now. |
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