Visible to the public A Deep Exploration of BitLocker Encryption and Security Analysis

TitleA Deep Exploration of BitLocker Encryption and Security Analysis
Publication TypeConference Paper
Year of Publication2020
AuthorsTan, Cheng, Zhang, Lijun, Bao, Liang
Conference Name2020 IEEE 20th International Conference on Communication Technology (ICCT)
KeywordsBitLocker encryption, Dictionaries, Encryption, external key, Force, Hard disks, Partitioning algorithms, password, pubcrawl, recovery key, resilience, Resiliency, security analysis, System recovery, Universal Serial Bus, unlock password, VMK
AbstractDue to the popularity of Windows system, BitLocker is widely used as a built-in disk encryption tool. As a commercial application, the design of BitLocker has to consider a capability of disaster recovery, which helps a user to recover data stored on encrypted disk when a regular access is not available. In this case, it will inevitably lead to some security risks when using BitLocker. We have a deep exploration of BitLocker encryption mechanism in this paper. We present the decryption method of encrypted VMK in case of system partition encryption and non-system partition encryption, respectively. VMK is the core key in BitLocker, with which the encrypted partition or the entire disk can be further decrypted. As for security analysis on BitLocker, we firstly make a difficulty analysis of brute force cracking on BitLocker keys, and then we analyze a possible threat caused by key theft. Based on this, we propose a few countermeasures about BitLocker usage. Additionally, we give some suggestions about security enhancement of BitLocker encryption.
DOI10.1109/ICCT50939.2020.9295908
Citation Keytan_deep_2020