Category Archives: Jesting

“A jest’s prosperity lies in the ear of him that hears it, never in the tongue of him that makes it.”

Differential Power Analysis vs AES

This post is a follow-up to my last post regarding correlation power analysis (CPA). A second technique, differential power analysis (DPA), can also be used to analyze power traces to extract information. The specific attack I will illustrate below is … Continue reading

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Correlation Power Analysis vs AES

Recently, I spent some time learning about power analysis attacks. This has been an interesting journey with many interesting applications. The theory behind this is simple – that different operations (or – crucially – the same operation with different data) … Continue reading

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Atredis BH Ticket 2018 Challenge Writeup

Earlier this year, I completed a binary reverse engineering challenge from Atredis Partners. This was interesting, so I will present the writeup below, for posterity. The challenge began with a Slack message from a comrade, who mentioned there was a … Continue reading

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Karma on ESP8266

Earlier this year, I had wondered whether it was feasible to implement the Karma attack on a low-powered device, such as the ESP8266. It turns out this was quite simple, and you can now find a template for this on … Continue reading

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Writeups – Mr Reagan, Bluepill (Securityfest CTF)

This weekend, I particpated for a short while in the Securityfest CTF. During the time available, I was able to solve a few challenges – I will present the writeups for two of them here. Mr Reagan This challenge was … Continue reading

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