Attacking Pairing-Free Attribute-Based Encryption Schemes
نویسندگان
چکیده
منابع مشابه
Applied Attribute-based Encryption Schemes
The advent of new cryptographic methods in recent years also includes schemes related to functional encryption. Within these schemes Attribute-based Encryption (ABE) became the most popular, including ciphertext-policy and key-policy ABE. ABE and related schemes are widely discussed within the mathematical community. Unfortunately, there are only a few implementations circulating within the com...
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Certificate-based cryptography is a new paradigm that combines traditional public-key cryptography and identity-based cryptography. It not only simplifies the cumbersome certificate management in traditional public-key cryptography, but also eliminates the key escrow and distribution problems inherent in identity-based cryptography. However, all constructions of certificate-based encryption in ...
متن کاملThe Exact Security of Pairing Based Encryption and Signature Schemes
Bilinear pairings have been intensively used in the design of cryptographic protocols during the last few years. For instance, short signatures and non-interactive key exchange protocols have been designed with them, and they appear as a key component for identity-based cryptography. Focusing on encryption and signature schemes built on bilinear pairings, we look at the security reductions of s...
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Attribute-based encryption (ABE) with outsourced decryption not only enables finegrained sharing of encrypted data, but also overcomes the effective drawback of the standard ABE schemes. An Attribute based encryption scheme with outsourced decryption allows a third party (e.g., a cloud server) to renovate an ABE cipher text into a (short) El Gamal-type cipher text using a public transformation ...
متن کاملEfficient and Provable Secure Ciphertext-Policy Attribute-Based Encryption Schemes
In a ciphertext-policy attribute-based encryption (CP-ABE) scheme, the data is encrypted under an access policy defined by a user who encrypts the data and a user secret key is associated with a set of attributes which identify the user. A user can decrypt the ciphertext if and only if his attributes satisfy the access policy. In CP-ABE, since the user enforces the access policy at the encrypti...
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ژورنال
عنوان ژورنال: IEEE Access
سال: 2020
ISSN: 2169-3536
DOI: 10.1109/access.2020.3044143