Sack key: an offline mobile password manager application.

Ahmad Tarmizi, Muhammad Afiq Haikal and Mohd Asri, Muhammad Anwar and Md Yusof, Norlia (2026) Sack key: an offline mobile password manager application. International Journal on Perceptive and Cognitive Computing (IJPCC), 12 (2). pp. 142-150. E-ISSN 2462-229X

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Abstract

The rapid growth of online services has significantly increased the number of credentials users must manage, leading to widespread password reuse and weak authentication practices. This issue is particularly severe on mobile devices, where usability constraints often conflict with secure password management. Existing password managers commonly rely on cloud-based storage and subscription models, which introduce privacy concernsand increase exposure to centralized attacks. This paper presents Sack Key, a privacy-centric mobile password manager designed with an offline-first architecture to enhance security and user control. Sack Key securely stores credentials locally using AES-256 encryption and eliminates dependency on cloud infrastructure. The system incorporates multi-layer security mechanisms, including master password, Two-Factor Authentication (2FA), automatic session locking and privacy-preserving features such as manual encryption and decryption. Additionally, Sack Key supports secure peer-to-peer password sharing over local networks without internet connectivity. The resultsof functional, security and user testingindicate that Sack Key provides reliable password protection, strong user trust in offline security and intuitive user experience. The findings demonstrate that an offline-first password manager can effectively balance usability, security and privacy in mobile environments.

Item Type:	Article (Journal)
Uncontrolled Keywords:	Password Manager, Offline-First, AES Encryption, Two-Factor Authentication, Mobile Security, Privacy.
Subjects:	T Technology > T Technology (General) > T10.5 Communication of technical information
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Information and Communication Technology > Department of Computer Science Kulliyyah of Information and Communication Technology > Department of Computer Science
Depositing User:	Dr Norlia Md Yusof
Date Deposited:	09 Aug 2026 17:07
Last Update:	09 Aug 2026 17:07
Queue Number:	2026-08-Q4566
URI:	http://irep.iium.edu.my/id/eprint/130585

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