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  1. 33C3 CTF: Fun times

    pdfmaker (75 points)

    The first challenge I tried was pdfmaker. Surprisingly I spent way too much time on this simple starter challenge. I initially planned to use this challenge as a warm up but ended spending about 10 hours on it, mostly due to me overlooking simpler solutions that are ...

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  2. TUM CTF: boot2brainfuck

    According to the description, hxp provides us with a brainfuck (BF) execution service where we can send BF programs over netcat and execute them. To help, they provide us with a script that translated BF programs into a DOS, 16-bit COM executable.

    Now as a reminder, DOS COM executables are ...

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  3. AMD SEV attack surface: a tale of too much trust

    AMD recently announced the new Secure Encrypted Virtualization (SEV) extension that intends to protect virtual machines against compromised hypervisors/Virtual Machine Monitors (VMMs). An intended use-case of SEV is to protect a VM against a malicious cloud provider. All memory contents are encrypted and the cloud provider cannot recover any ...

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  4. AsiaCCS and China

    The last three weeks I've been traveling through China, Hong Kong, and Macau on an interesting security tour thanks to this year's AsiaCCS being held in Xi'an, China. AsiaCCS was right after Oakland, so I flew directly from San Francisco to Xi'an China and then continued ...

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