Study of Attribute Hiding and Key Policy Hiding Mechanism in Function Encryption Scheme

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Project title

Code/計畫編號

MOST103-2221-E019-042

Translated Name/計畫中文名

函數加密機制中密文屬性隱藏與密鑰函數隱藏方法之研究

Project Coordinator/計畫主持人

Pei-Yih Ting

Funding Organization/主管機關

National Science and Technology Council

Department/Unit

Department of Computer Science and Engineering

Website

https://www.grb.gov.tw/search/planDetail?id=8344289

Year

2014

Start date/計畫起

01-08-2014

Expected Completion/計畫迄

31-07-2015

Bugetid/研究經費

217千元

ResearchField/研究領域

資訊科學--軟體

本計劃探討函數加密機制中隱藏解密政策/函數的方法，並且定義適當的安全要求。隱藏密文屬性與密鑰解密政策後，函數加密機制可以轉換為有效率地可重複使用的Garbled Circuit 或是轉換為可維持函數私密性的伺服器委託運算機制，在限制式的虛擬隨機函數中隱藏密鑰對應的電路也可以得到委託機制的匿名性。本計畫中透過多項式的性質來隱藏運用多線性對應實現的邏輯電路的運作, 使得解密時比對密文屬性的工作能夠與邏輯閘的種類無關。 In this project, we focus on developing the hiding mechanisms of the ciphertext attributes and the secret key policy/function of functional encryption schemes. In case the ciphertext attributes and the secret key policy/function are suitably hidden, a functional encryption scheme can implement a reusable Garbled circuit much more efficiently or can be turned into a computation delegation mechanism which provides the secrecy of the delegated function. In a way, we fill in the gap between fundamental encryption mechanisms and the cloud based computation/ storage schemes from the theoretical point of view. We use properties of polynomials to hide the operations of Boolean gates in a general circuit implemented through multi-linear maps such that the matching of attributes of a ciphertext at decryption is independent of their relative positions and their logical functions.

Keyword(s)

屬性加密
函數加密
密文屬性隱藏
密鑰解密政策隱藏
可搜尋的公開金鑰加密
attribute-based encryption
functional encryption
ciphertext attribute hiding
key policy hiding
searchable public key encryption

DSpace CRIS

Study of Attribute Hiding and Key Policy Hiding Mechanism in Function Encryption Scheme

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