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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Chow, S.S.M. Siu-Ming Yiu |
| Copyright Year | 2011 |
| Description | Author affiliation: Department of Combinatorics and Optimization, University of Waterloo,Ontario, Canada N2L3G1 (Chow, S.S.M.) || Department of Computer Science, University of Hong Kong, Pokfulam, Hong Kong (Siu-Ming Yiu) |
| Abstract | Identity-based encryption (IBE) has shown to be a useful cryptographic scheme enabling secure yet flexible role-based access control. We propose a new variant of IBE named as exclusion-intersection encryption: during encryption, the sender can specify the targeted groups that are legitimate and interested in reading the documents; there exists a trusted key generation centre generating the intersection private decryption keys on request. This special private key can only be used to decrypt the ciphertext which is of all the specified groups' interests, its holders are excluded from decrypting when the documents are not targeted to all these groups (e.g., the ciphertext of only a single group's interest). While recent advances in cryptographic techniques (e.g., attribute-based encryption or wicked IBE) can support a more general access control policy, the private key size may be as long as the number of attributes or identifiers that can be specified in a ciphertext, which is undesirable, especially when each user may receive a number of such keys for different decryption power. One of the applications of our notion is to support an ad-hoc joint project of two or more groups which needs extra helpers that are not from any particular group. |
| Starting Page | 1048 |
| Ending Page | 1053 |
| File Size | 424224 |
| Page Count | 6 |
| File Format | |
| ISBN | 9781457702495 |
| e-ISBN | 9781457702488 |
| DOI | 10.1109/INFCOMW.2011.5928782 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2011-04-10 |
| Publisher Place | China |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Access control Algorithm design and analysis Identity-based encryption compact private key applied cryptography Educational institutions identity-based encryption access control Encryption data confidentiality pairings |
| Content Type | Text |
| Resource Type | Article |
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