Constant-Ciphertext-Size Dual Policy Attribute Based Encryption

• Miyaji, Atsuko

• Tran, Phuong V.X.

抄録

Dual-Policy Attribute Based Encryption (DP-ABE), proposed in 2009, is a combination of two variants, Ciphertext Policy-ABE (CP-ABE) and Key Policy-ABE (KP-ABE), where an encryptor can associate the data simultaneously with both a set of objective attributes and of subjective access policies. Or, a user is given a private key assigned simultaneously for both a set of objective attributes and a subjective access policy. A major problem of the above DP-ABE scheme is the ciphertext size linear to the number of attributes while the LSSS access structure can be assumed. We propose two novel DP-ABEs, which achieve constant-size ciphertext, regardless of the number of attributes in a logical AND data access policy with wildcards. We present two constructions: the first scheme under the q-Bilinear Diffie Hellman Exponent (q-BDHE) and the second scheme under the Decisional Bilinear-Diffie-Hellman assumptions (DBDH).

4th International Symposium, CSS 2012, Melbourne, Australia, December 12-13, 2012. Proceedings

identifier:https://dspace.jaist.ac.jp/dspace/handle/10119/10905

収録刊行物

• Lecture Notes in Computer Science

  Lecture Notes in Computer Science 7672 400-413, 2012

  Springer

キーワード

• Attribute-based Encryption
• Dual Policy
• Constant Ciphertext Length Size

詳細情報

• CRID: 1050845762468509696
• NII論文ID: 120005147912
• ISSN: 03029743
• Web Site: http://hdl.handle.net/10119/10905
• 本文言語コード: en
• 資料種別: journal article
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