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I am Dave Jing Tian, an Assistant Professor in the Department of Computer Science at Purdue University working on system security. My research involves embedded systems, operating systems, trusted and confidential computing, and hardware security and trust. All opinions are my own.
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Author Archives: daveti
IEEE Workshop on the Internet of Safe Things
Dear Colleagues, Apologies if this reached you through multiple channels. If you or anyone you know does research in Security and Privacy related to IoT, Mobile Devices and Platforms, Cyber-Physical Systems please consider submitting your early work or demos of … Continue reading
Some Thoughts about PCI Express Device Security Enhacement
The USB Type-C Authentication specification provides a method to authenticate USB products, although with some flaws. As you might wonder — what about other non-USB peripherals? How can we establish trust with them instead of “Trust-by-Default”? That’s how I ended … Continue reading
Posted in Security
Tagged DICE, MCTP, PCIe, RoT, RTM, RTR, TCG, USB Type-C, USB Type-C Authentication
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Some notes for my security class stduents…
There were some crazy shooting and beating incidents happened in the past few weeks, and we have seen how our communities are trying to fight together to stop the hatred and racism. Unsurprisingly, my students asked me for my comments … Continue reading
Posted in Life Prose
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Ubuntu Kernel Build Again
I wrote two blog posts about Linux kernel build on Ubuntu [1,2]. There is also an official wiki page talking about the same thing [3]. Still, things are broken when I try to create a homework assignment for my class. … Continue reading
USB Fuzzing: A USB Perspective
Syzkaller [1] starts to support USB fuzzing recently and has already found over 80 bugs within the Linux kernel [2]. Almost every fuzzing expert whom I talked to has started to apply their fuzzing techniques to USB because of the … Continue reading
Speculations on Intel SGX Card
One of the exciting things Intel has brought to RSA 2019 is Intel SGX Card [2]. Yet there is not much information about this coming hardware. This post collects some related documentation from Intel and speculates what could happen within … Continue reading
Syscall hijacking in 2019
Whether you need to implement a kernel rootkit or inspect syscalls for intrusion detection, in a lot of cases, you might need to hijack syscall in a kernel module. This post summorizes detailed procedures and provides a working example for … Continue reading
Hacking Valgrind
This post talks about 3 commits I have recently added into my own valgrind tree [1], including the support for fsgsbase instructions, rdrand/rdseed instructions, and adding a new trapdoor (client request) to support gdb-like add-symbol-file command. Note that all these … Continue reading
Posted in Dave's Tools, Programming
Tagged add-symbol-file, cpuid, fortanix, fsgsbase, gdb, rdrand, rdseed, trapdoor, valgrind, x86_64
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