I am currently a DPhil student in Cyber Security at the University of Oxford, funded by the Clarendon Fund, the EPSRC, Kellogg College, and the CDT in Cyber Security. My research is on "Exploiting Hardware Imperfections", and is supervised by Prof. Kasper Rasmussen.

I hold an MPhil in Advanced Computer Science with Distinction from the University of Cambridge, where I was the Goulandris Scholar at Magdalene College. I was supervised by Dr. Eiko Yoneki, and my dissertation was titled "Distributed Massive Graph Triangulation".

Earlier, I graduated Summa Cum Laude from Princeton University, with an AB in Mathematics. My thesis titled "A Practical Variant of Cuckoo Hashing" was supervised by Prof. Robert Sedgewick.


Most recently, I interned in the FPGA R&D group at Jump Trading, and the Embedded Systems team at Microsoft Research, where I worked with Dr. Ken Eguro on a covert/side-channel project on FPGAs.

I have also been an intern in the Product Abuse team at Dropbox, the Windows Security team at Microsoft, and the Data License team at Bloomberg.

I was also a Grader and Lab TA at Princeton for courses across all undergraduate levels, and have had similar duties at Oxford.


Peer-Reviewed Publications

I. Giechaskiel, K. Rasmussen, and K. Eguro, "Leaky Wires: Information Leakage and Covert Communication Between FPGA Long Wires," 13th ACM Asia Conference on Computer and Communications Security (ASIACCS), Incheon, Republic of Korea, June 2018. [Preprint, and Final Version]

I. Giechaskiel, C. Cremers, and K. Rasmussen, "When the "Crypto" in Cryptocurrencies Breaks: Bitcoin Security Under Broken Primitives," IEEE Security & Privacy, vol. 16, no. 4, pp. XX-XX, July/August 2018. [To appear]

I. Giechaskiel, C. Cremers, and K. Rasmussen, "On Bitcoin Security in the Presence of Broken Cryptographic Primitives," 21st European Symposium on Research in Computer Security (ESORICS), Heraklion, Crete, Greece, September 2016. [Preprint, and Final Version]

I. Giechaskiel, G. Panagopoulos, and E. Yoneki, "PDTL: Parallel and Distributed Triangle Listing for Massive Graphs," 44th International Conference on Parallel Processing (ICPP), Beijing, China, September 2015. [Preprint and Code, Extended Technical Report, and Final Version]

Technical Reports

I. Giechaskiel, "Eavesdropping on and Emulating MIFARE Ultralight and Classic Cards Using Software-Defined Radio," University of Oxford, CDT in Cyber Security, Technical Report 12/15, August 2015. [Poster and Code]


My name, spelled Ηλίας Γιεχασκιέλ in Greek, is pronounced as ee-LEE-us ye-ha-SKEL.

I like participating in security Capture the Flag contests. I am captain and co-founder of the Oxford Computer Science CTF Team Ox002147. The team was ranked top 100/14,000+ teams in 2017, and also placed first in in-person CTF competitions organized by Deloitte and BAE Systems. I also individually placed second in Tripwire VERT's 2015 Cyber Security Capture The Flag Contest.

In the past, I used to compete in mathematical olympiads, at the Greek National, Balkan (1, 2), and International (1, 2) level.

I am an alumnus of Camp Rising Sun, and the Ross Mathematics Program, both as a student, and as a Junior Counselor.

I have been the Communications & Technology chair for the Princeton Association UK alumni club since 2015 and was the president of the Oxford University Greek Society between 2016-2018.

I also made and administer my brother's personal and weight training book websites and my sister's beauty salon site. The canonical URL for this website is, but it can also be accessed through the more memorable

I occasionally dabble with Android development, having added support for Greek in Hacker's Keyboard, and having published a Tasker plugin allowing messages to be sent over Bluetooth serial.

I like to think that I am a decent goalkeeper.


For more details, including my email address, please refer to my CV. You can also find me on GitHub, Google Scholar, and LinkedIn.