ID-Based Outsourced Plaintext Checkable Encryption in Healthcare Database

ID-Based Plaintext Checkable Signcryption with Equality Test in Healthcare Systems

“…However, our proposed scheme enables digital signing of the plaintext, delegating the test for equality to a third party via inverse trapdoor computation, and deployment of identity-based cryptosystem to eradicate the problem of key-escrow [39] associated with certificate authorities (CA). We observed that Carnard et al [2] and Alornyo et al [1] proposed constructions when improved will be useful in healthcare systems, such that plaintext keywords can be digitally signed to achieve a dual benefits of digital signature and public key encryption. Again, digitally signing the plaintext and delegating the search for equality to a third party denies anonymous tester to check for equality on whether the signed plaintext is the encryption of the signtext message.…”

“…Because of the need to signcrypt and authenticate a signcryptext to achieve data integrity, authentication, and nonrepudiation in the work presented at ICSIoT 2019 [1], we propose an improved identity-based plaintext checkable signcryption with equality test in healthcare to resist forgery and re-play attacks during data access and transmission. Our suggested construction achieved the simultaneous benefit of digital signature and public key encryption (PKE).…”

“…The scheme at ICSIoT 2019 [1] constructed ID-based checkable plaintext encryption in healthcare database systems. However, plaintext checkable encryption cryptographic primitive first presented by Carnard et al [2] in CT-RSA-2012 enabled the checkability of plaintext to a ciphertext without revealing the content of the ciphertext.…”

“…According to Tables 1 and 2, the user can perform equality check between the plaintext and the ciphertext. The work in [1] enabled a medical keyword check such as 'HIV' whether encrypted or unencrypted. The checkability of encrypted and unencrypted keyword is a remarkable cryptographic tool in plaintext checkable encryption (PCE), since not all keywords need to be encrypted during a search process.…”