{"id":298,"date":"2024-01-14T10:14:18","date_gmt":"2024-01-14T10:14:18","guid":{"rendered":"https:\/\/www.alanknipmeyer.phd\/?p=298"},"modified":"2024-01-14T10:30:49","modified_gmt":"2024-01-14T10:30:49","slug":"lab-progress-14-1-24","status":"publish","type":"post","link":"https:\/\/www.alanknipmeyer.phd\/index.php\/2024\/01\/14\/lab-progress-14-1-24\/","title":{"rendered":"Lab Progress"},"content":{"rendered":"\n
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Make time for each other – a well deserved night away to relax and recoup!<\/figcaption><\/figure>\n\n\n\n

Having had a very busy back to my regular job as a DevOps consultant as well completing my presentation slides, it was time for some much needed time away with my good lady. We stayed in a local hotel and thoroughly enjoyed our time together – away from the distractions of work and studies it was lovely to have a nice time together – and did I sleep well !<\/p>\n\n\n\n

I returned to work and then my studies in the evening, with the added bonus that the near-field antennas I had ordered from Ebay had arrived !<\/p>\n\n\n\n

\n
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what i received<\/figcaption><\/figure>\n\n\n\n
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ebay advert<\/figcaption><\/figure>\n<\/figure>\n\n\n\n

I’m always a little dubious of ordering goods from Ebay, they can look great in the pictures and never sure they can actually work. In the first instance I tried it with my Raspberry Pi4, and didn’t detect any signals on the clock frequency of the processor (600Mhz), I was able to confirm the log frequency using the following command.<\/p>\n\n\n\n

cat \/sys\/devices\/system\/cpu\/cpu0\/cpufreq\/scaling_cur_freq\n600000<\/code><\/pre>\n\n\n\n
So I should be picking up something at 600Mhz, but to no avail. <\/p>\n\n\n\n
\"\"<\/figure>\n\n\n\n
I continued to strip down the RPi4, removing the heat sink, the casing, but no results. I reviewed the academic paper (Sayakkara,2019<\/a>) and noticed that a RPi3b was being used, and the processor shielding was different. With that I went thru my pile of technology projects and used my NOAA receiver which wasn’t currently in use, but a RPi3b board. I re-loaded Debian buster on a new flash card (keeping the NOAA one safe, its alot of configuration to get it working…) and tried the near field antenna once more.<\/p>\n\n\n\n
\n
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signals in GQRX<\/figcaption><\/figure>\n\n\n\n
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temporary mounting<\/figcaption><\/figure>\n<\/figure>\n\n\n\n
Sure enough I was picking up signals right away and could prove by moving the antenna around it was the CPU I was monitoring. I’ve used a jar to hold the antenna in place for now, but have ordered a better solution by way of a ‘helping hands’ setup, which will allow the antenna to be placed at the best distance to get spurious signals from the CPU to the HackRF.<\/p>\n\n\n\n
I’ve found the gitlab<\/a> repo which contains all the code which was used to conduct the experiments, so my next step is to re-create those given in the paper and compare my results, then I can start investigating coding in other languages.<\/p>\n\n\n\n
Hopefully next weeks post (planning once per week on a Sunday) will demonstrate the capture.machine learning and cryptanalysis of the various ciphers (3DES, AES, RSA).<\/p>\n","protected":false},"excerpt":{"rendered":"
Having had a very busy back to my regular job as a DevOps consultant as well completing my presentation slides, it was time for some much needed time away with my good lady. We stayed in a local hotel and thoroughly enjoyed our time together – away from the distractions of work and studies it […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[18,20,19,17],"tags":[],"class_list":["post-298","post","type-post","status-publish","format-standard","hentry","category-antenna","category-cryptanalysis","category-gitlab","category-lab"],"_links":{"self":[{"href":"https:\/\/www.alanknipmeyer.phd\/index.php\/wp-json\/wp\/v2\/posts\/298","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.alanknipmeyer.phd\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.alanknipmeyer.phd\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.alanknipmeyer.phd\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.alanknipmeyer.phd\/index.php\/wp-json\/wp\/v2\/comments?post=298"}],"version-history":[{"count":3,"href":"https:\/\/www.alanknipmeyer.phd\/index.php\/wp-json\/wp\/v2\/posts\/298\/revisions"}],"predecessor-version":[{"id":317,"href":"https:\/\/www.alanknipmeyer.phd\/index.php\/wp-json\/wp\/v2\/posts\/298\/revisions\/317"}],"wp:attachment":[{"href":"https:\/\/www.alanknipmeyer.phd\/index.php\/wp-json\/wp\/v2\/media?parent=298"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.alanknipmeyer.phd\/index.php\/wp-json\/wp\/v2\/categories?post=298"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.alanknipmeyer.phd\/index.php\/wp-json\/wp\/v2\/tags?post=298"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}