Abstract :

Cloud Computing Has Been The Remedy To The Problem Of Personal Data Management And Maintenance Due To The Growth Of Personal Electronic Devices. It Is Because Users Can Outsource Their Data To The Cloud With Ease And Low Cost. The Emergence Of Cloud Computing Has Also Influenced And Dominated Information Technology Industries. It Is Unavoidable That Cloud Computing Also Suffers From Security And Privacy Challenges. Encryption Is The Basic Method For Enabling Data Confidentiality And Attribute-based Encryption Is A Prominent Representative Due To Its Expressiveness In User’s Identity And Data [1]– [4]. After The Attribute- Based Encrypted Data Is Uploaded In The Cloud, Authorized Users Face Two Basic Operations: Data Searching And Data Sharing. Unfortunately, Traditional Attribute-based Encryption Just Ensures The Confidentiality Of Data. Hence, It Does Not Support Searching And Sharing. Suppose In A Person Health Record (PHR) System [5]– [7], A Group Of Patients Store Their Encrypted Personal Health Reports Enc (D1, P1, KW1), Enc (Dn, Pn, KWn) In The Cloud, Where Enc (Di, Pi, KWi) Is An Attribute-based Encryption Of The Health Report Di Under An Access Policy Pi And A Keyword KW . Doctors Satisfying The Policy P Can Recover The Record Di. However, They Could Not Retrieve The Specific Record By Simply Typing The Keyword. Instead, A Doctor Alice Needs To First Download And Decrypt The Encrypted Records. After Decryption, She Can Use The Keyword To Search The Specific One From A Bunch Of The Decrypted Health Records. Another Inconvenient Scenario Is That Alice Attempts To Share A Record 55 With Her Colleague, In The Case Like She Needs To Consult The Report With A Specialist. In This Situation, She Must Download The Encrypted Files, Then Decrypt Them. Then, After She Has Acquired The Underlying Record, She Encrypts The Record Using The Policy Of The Specialist. As A Result, This System Is Very Inefficient In Terms Of Searching And Sharing.

Published:

09-6-2025

Issue:

Vol. 25 No. 6 (2025)

Page Nos:

321-328

Section:

Articles

License:

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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