Changhee Hahn
Chung-Ang University
10 Papers
57 Citations
Changhee Hahn is an academic researcher from Chung-Ang University. The author has contributed to research in topics: Cloud computing & Authentication. The author has an hindex of 4, co-authored 10 publications. Previous affiliations of Changhee Hahn include Korea University.
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Papers
Enabling Fast Public Auditing and Data Dynamics in Cloud Services
TL;DR: This paper proposes a novel public auditing scheme that provides data dynamics that are orders of magnitude faster than previous methods and reduces the computation cost of the TPA significantly, thus increasing the verification speed for the auditing results.
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Secure Device-to-Device Authentication in Mobile Multi-hop Networks
Hyunsoo Kwon,Changhee Hahn,Daeyoung Kim,Kyungtae Kang,Junbeom Hur +4 more
- 23 Jun 2014
TL;DR: Novel D2D authentication protocols with a secure initial key establishment using ciphertext-policy attribute-based encryption (CP-ABE) to solve the problem of vulnerability to main-in-the-middle (MITM) and replay attacks in mobile multi-hop networks.
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Privacy-preserving public auditing for educational multimedia data in cloud computing
TL;DR: A public auditing protocol for educational multimedia data outsourced in the cloud storage that ensures data privacy for the cloud and the third party auditor (TPA) and is secure against lose attack and temper attack is proposed.
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Secure deduplication for multimedia data with user revocation in cloud storage
TL;DR: This work proposes a secure deduplication scheme with user revocation that leverages oblivious pseudo-random function to generate encryption key and enforces data access policy using privilege-based encryption to provide user revocation.
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A Privacy Threat in 4th Generation Mobile Telephony and Its Countermeasure
Changhee Hahn,Hyunsoo Kwon,Daeyoung Kim,Kyungtae Kang,Junbeom Hur +4 more
- 23 Jun 2014
TL;DR: This paper proposes an attack model which makes it possible to trace a victim's mobile device so that the attacker can know the presence of the victim's device in a specific area, and builds the scheme to have low computational overhead and strong secrecy.
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