Retrieving Bitlocker keys from the TPM using SPI, I2C or LPC communications requires an understanding of the specific protocol supported by the TPM chip, as well as the device’s make and model.

Proper documentation and research are essential for successful key retrieval. This repo is to collaborate all the awesome resources and information hopefully into one place!

NOTE: I’m 100% sure that there is alot of blogs/data missing here, but please if you know of any and want to contribute, please DO a PR!


Trusted Platform Module (TPM) is a hardware-based security chip that is often used to store encryption keys securely, including Bitlocker keys used for full disk encryption in Windows environments.

Retrieving these keys from the TPM can be achieved through various communication channels, although the specific method may vary depending on the device’s make and model.

Table: TPM Communication Methods

MakeModelModel NumberTPMChipsetProtocolLocationDebug HeadersBlog/ResearchExtractable
LenovoThinkpadL4401.2P24JPVSPLPCUnder KeyboardYesBlogYes
LenovoX1 CarbonGen 112.0ST33TPHF2XSPISPIUnder MotherboardTest Pads@NoobieDogYes
MicrosoftSurface Pro 32.0SLB9665TT2.0LPCUnder BatteryNoBlogYes
AsusTPM-M R2.02.0SLB9665TT2.0LPCYesVideoYes


For further information and detailed instructions, refer to the provided blog posts and research documents.

A Deep Dive into TPM-based BitLocker Drive Encryption

TPM Sniffing

Extracting BitLocker keys from a TPM

Bypassing Bitlocker using a cheap logic analyzer on a Lenovo laptop

From Stolen Laptop to Inside the Company Network

Sniffing Bitlocker Keys on the SPI Bus

TPM 2.0: Extracting Bitlocker keys through SPI

Understanding TPM Sniffing Attacks

Breaking Bitlocker: Bypassing the Windows Disk Encryption

TPM Sniffing Attacks Against Non-Bitlocker Targets

Sniff, there leaks my BitLocker key

Bitlocker Attacks

BitCracker: BitLocker meets GPUs

TPM Fail

TPM Vulnerabilties

AMD TPM Exploit


A list of awesome tools for sniffing TPM data are listed below.





IceStick LPC TPM Snigger


Hands-on-security Bitlocker/TPM Hardware training Course

Published by Tamil S

Tamil has a great interest in the fields of Cyber Security, OSINT, and CTF projects. Currently, he is deeply involved in researching and publishing various security tools with Kali Linux Tutorials, which is quite fascinating.

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