Abstract:Abstract. Public-key Encryption with Keyword Search (PEKS) allows authorized users to search by keywords on encrypted data by generating trapdoors for the desired keywords. Basically there are two requirements for the process of trapdoors generation. On one hand, it is important to allow users to privately search on encrypted data without revealing keywords to the Trapdoor Generation Entity T GE, and solutions proposed are based on the use of blinding protocols between user and T GE. On the other hand, in some… Show more
“…In 2012, Nishioka [9] presented a new security definition for non-interactive PEKS, named perfect keyword privacy (PKP). Same year, Siad [10] extended the notion of anonymous IBE, and gave a method for converting the blind anonymous IBE to a threshold PEKS with oblivious keyword search. In 2015, Rhee and Dong [11] proposed PEKS with keyword updatability, where a tagged keyword can be updated upon the receiver's request.…”
Currently, the security situation of data security and user privacy protection is increasingly serious in cloud environment. Ciphertext data storage can prevent the risk of user's privacy disclosure. But how to search keyword on ciphertext data without revealing keyword information becomes a new challenge. Searchable encryption (SE) is put forward for this reason, which can be used to realize ciphertextsearch directly. In terms of multiuser data sharing, public-key encryption with keywords search (PEKS) is more widely used than symmetric searchable encryption. PEKS has been widely studied and developed by researchers in recent years. However, the existing PEKS scheme often lacks flexible access policy. Therefore, combining the advantage of policy control on attribute-based encryption (ABE), and as that the bilinear pairing related assumption is fragile in post-quantum era, lattice-based cryptography is considered as one of secure encryption technology against quantum attack. With this background, in this paper, we give a keyword-searchable ABE scheme based on the hardness of lattice problems, our scheme supports flexible attribute control policy by integrating ABE and PEKS, and the security of new scheme is proved under the learning with errors (LWE) assumption. As lattice-based cryptographic technology is currently thought to be resistant to quantum attacks, so the new scheme has stronger security in a quantum era. INDEX TERMS Lattices, attribute-based encryption (ABE), public-key encryption with keyword search (PEKS), learning with errors (LWE).
“…In 2012, Nishioka [9] presented a new security definition for non-interactive PEKS, named perfect keyword privacy (PKP). Same year, Siad [10] extended the notion of anonymous IBE, and gave a method for converting the blind anonymous IBE to a threshold PEKS with oblivious keyword search. In 2015, Rhee and Dong [11] proposed PEKS with keyword updatability, where a tagged keyword can be updated upon the receiver's request.…”
Currently, the security situation of data security and user privacy protection is increasingly serious in cloud environment. Ciphertext data storage can prevent the risk of user's privacy disclosure. But how to search keyword on ciphertext data without revealing keyword information becomes a new challenge. Searchable encryption (SE) is put forward for this reason, which can be used to realize ciphertextsearch directly. In terms of multiuser data sharing, public-key encryption with keywords search (PEKS) is more widely used than symmetric searchable encryption. PEKS has been widely studied and developed by researchers in recent years. However, the existing PEKS scheme often lacks flexible access policy. Therefore, combining the advantage of policy control on attribute-based encryption (ABE), and as that the bilinear pairing related assumption is fragile in post-quantum era, lattice-based cryptography is considered as one of secure encryption technology against quantum attack. With this background, in this paper, we give a keyword-searchable ABE scheme based on the hardness of lattice problems, our scheme supports flexible attribute control policy by integrating ABE and PEKS, and the security of new scheme is proved under the learning with errors (LWE) assumption. As lattice-based cryptographic technology is currently thought to be resistant to quantum attacks, so the new scheme has stronger security in a quantum era. INDEX TERMS Lattices, attribute-based encryption (ABE), public-key encryption with keyword search (PEKS), learning with errors (LWE).
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.