WebCloud: Web-Based Cloud Storage for Secure Data Sharing Across Platforms

doi:10.1109/TDSC.2020.3040784

2022-05-01

PRE

DOI：10.1109/TDSC.2020.3040784

原文链接

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摘要

En 中文

With more and more data moving to the cloud, privacy of user data have raised great concerns. Client-side encryption/decryption seems to be an attractive solution to protect data security, however, the existing solutions encountered three major challenges: low security due to encryption with low-entropy PIN, inconvenient data sharing with traditional encryption algorithms, and poor usability with dedicated software/plugins that require certain types of terminals. This work designs and implements WebCloud, a practical browser-side encryption solution, leveraging modern Web technologies. It solves all the above three problems while achieves several additional remarkable features: robust and immediate user revocation, fast data processing with offline encryption and outsourced decryption. Notably, our solution works on any device equipped with a Web user agent, including Web browsers, mobile and PC applications. We implement WebCloud based on ownCloud for basic file management utility, and utilize WebAssembly and Web Cryptography API for complex cryptographic operations integration. Finally, comprehensive experiments are conducted with many well-known browsers, Android and PC applications, which indicates that WebCloud is cross-platform and efficient. As an interesting by-product, the design of WebCloud naturally embodies a dedicated and practical ciphertext-policy attribute-based key encapsulation mechanism (CP-AB-KEM) scheme, which can be useful in other applications.

Keyword:

Cryptography

Encryption

Cloud computing

Browsers

Security

Usability

Servers

Web-based cloud storage

secure data sharing

cross-platform encryption

decryption solution

attribute-based encryption

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期刊

IEEE Transactions on Dependable and Secure Computing

IF:

7.5

论文数:

2.6K

被引数:

9.6K

机构

chinese academy of sciences

学者数:

56.7W

论文数: 45.0W

被引数: 704

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