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#ism

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Kevin Karhan :verified:<p><span class="h-card" translate="no"><a href="https://cr8r.gg/@kallemp" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>kallemp</span></a></span> you may find ample of pre-certifed transmitters for these <a href="https://infosec.space/tags/ISM" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ISM</span></a>-band useages where you only need to set the ITU region with like a DIP-Switch or Jumper wire and can feed it narrowband data straight into it.</p><ul><li>OFC these bands will be noisy af, so you will need some good passive recieval amplification, modulation, multiplexing and encoding to deal with it...</li></ul><p>But not standing out in terms of spectrum use and duty cycle is a good way to work this out.</p><p><a href="https://infosec.space/@kkarhan/114485149739604325" translate="no" rel="nofollow noopener" target="_blank"><span class="invisible">https://</span><span class="ellipsis">infosec.space/@kkarhan/1144851</span><span class="invisible">49739604325</span></a></p>
Kevin Karhan :verified:<p><span class="h-card" translate="no"><a href="https://cr8r.gg/@kallemp" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>kallemp</span></a></span> I didn't bother with <a href="https://infosec.space/tags/LoRa" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>LoRa</span></a> due to it being patented and <a href="https://infosec.space/tags/Meshtastic" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Meshtastic</span></a> for tending to pollute <a href="https://infosec.space/tags/ISM" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ISM</span></a> spectrum.</p><p>Also <a href="https://infosec.space/tags/CEPT" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>CEPT</span></a> does have data channels on <a href="https://infosec.space/tags/CB" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>CB</span></a> radio that are allowed to be used.</p><ul><li>Given the low duty cycle, I'd say it's worth using said <a href="https://infosec.space/tags/LicensingFree" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>LicensingFree</span></a> channels. Espechally since the only <em>"regulated"</em> part are transmitters and those are just transparent cheap boxes, so <a href="https://infosec.space/tags/AFSK" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>AFSK</span></a> will be fine.</li></ul><p>OFC one could use this across any spectrum or means, ranging from WSJT - moonbouncing at extreme narrowband and high frequences to <a href="https://infosec.space/tags/UHFSATCOM" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>UHFSATCOM</span></a> radio piracy. Obviously I disrecommend the latter for legal reasons!</p><ul><li>OFC one could also use it across i.e. <a href="https://infosec.space/tags/Iridium" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Iridium</span></a> and other <a href="https://infosec.space/tags/SATCOM" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SATCOM</span></a> and regular <a href="https://infosec.space/tags/VHF" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>VHF</span></a> &amp; <a href="https://infosec.space/tags/UHF" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>UHF</span></a> radios or even just print messages as QR-Codes...</li></ul>
Kevin Karhan :verified:<p><span class="h-card" translate="no"><a href="https://cr8r.gg/@kallemp" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>kallemp</span></a></span> I did in fact already thought about a <a href="https://github.com/KBtechnologies/PocketCrypto" rel="nofollow noopener" target="_blank">similar project and device.</a></p><ul><li>As for the anonymous reading / recieval: Using license-free <a href="https://infosec.space/tags/ISM" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ISM</span></a> bands like 27MHz <a href="https://infosec.space/tags/CB" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>CB</span></a> radio to send messages &amp; then recieving them like a <a href="https://infosec.space/tags/pager" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>pager</span></a> would work, only making the transmitter detectable during trabsmission via triangulation, which may have a too narrow window of a few seconds given <a href="https://infosec.space/tags/OTP" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>OTP</span></a> doesn't have <a href="https://infosec.space/tags/PGP" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>PGP</span></a>-Style overhead. Making it feasible for using <a href="https://infosec.space/tags/POCSAG" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>POCSAG</span></a> even... </li></ul><p>I merely focussed on <a href="https://github.com/KBtechnologies/ATP" rel="nofollow noopener" target="_blank">airgapped data transfers</a> as being able to do <a href="https://en.wikipedia.org/wiki/One-time_pad" rel="nofollow noopener" target="_blank">OTP encryption</a> wasn't feasible until the advent of legitimate 1TB microSD cards and thus <a href="https://github.com/KBtechnologies/Cryptofon/blob/master/docs/Cryptofon.txt#L45" rel="nofollow noopener" target="_blank">negligible impact on key logistics</a>, to even then one could update those OTA <a href="https://github.com/KBtechnologies/LambdaCrypt" rel="nofollow noopener" target="_blank">in a broadcast encrypted with per-user-/device-keys</a> if that's feasible.</p>
Kevin Karhan :verified:<p><span class="h-card" translate="no"><a href="https://aus.social/@jpm" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>jpm</span></a></span> <span class="h-card" translate="no"><a href="https://digipres.club/@timixretroplays" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>timixretroplays</span></a></span> <span class="h-card" translate="no"><a href="https://eigenmagic.net/@vampiress" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>vampiress</span></a></span> +9001%</p><p>All <a href="https://infosec.space/tags/ISM" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ISM</span></a> bands are shit. The least worse is 60GHz (and 120GHz as well as 240 GHz) because it's absorbed by atmospheric oxygen and optical/laser-like in terms of spacial duplexability.</p>
Kevin Karhan :verified:<p><span class="h-card" translate="no"><a href="https://nrw.social/@Jochen_Jansen" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>Jochen_Jansen</span></a></span> gibt ne Menge Zeugs in <a href="https://infosec.space/tags/ISM" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ISM</span></a>-Bändern:</p><p>27MHz, 40MHz, 150MHz, 433MHz, ... 2,4 GHz, ... </p><p>Viel Spaß beim suchen, ohne <a href="https://infosec.space/tags/Datenblatt" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Datenblatt</span></a> des Tachos und nen <a href="https://infosec.space/tags/RTLSDR" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>RTLSDR</span></a> oder gar <a href="https://infosec.space/tags/HackRF" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>HackRF</span></a> wirste nix finden!</p>
IT News<p>Get Into Meshtastic On the Cheap With This Tiny Node Kit - There’s been a lot of buzz about Meshtastic lately, and with good reason. The low-... - <a href="https://hackaday.com/2025/03/08/get-into-meshtastic-on-the-cheap-with-this-tiny-node-kit/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">hackaday.com/2025/03/08/get-in</span><span class="invisible">to-meshtastic-on-the-cheap-with-this-tiny-node-kit/</span></a> <a href="https://schleuss.online/tags/radiohacks" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>radiohacks</span></a> <a href="https://schleuss.online/tags/meshtastic" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>meshtastic</span></a> <a href="https://schleuss.online/tags/wio" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>wio</span></a>-sx1262 <a href="https://schleuss.online/tags/esp32" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>esp32</span></a>-s3 <a href="https://schleuss.online/tags/network" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>network</span></a> <a href="https://schleuss.online/tags/lora" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>lora</span></a> <a href="https://schleuss.online/tags/mesh" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>mesh</span></a> <a href="https://schleuss.online/tags/node" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>node</span></a> <a href="https://schleuss.online/tags/xiao" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>xiao</span></a> <a href="https://schleuss.online/tags/ism" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ism</span></a></p>
Kevin Karhan :verified:<p><span class="h-card" translate="no"><a href="https://sueden.social/@Laberpferd" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>Laberpferd</span></a></span> <span class="h-card" translate="no"><a href="https://chaos.social/@DO9XE" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>DO9XE</span></a></span> Muss mal nachlesen auf der Seite der <span class="h-card" translate="no"><a href="https://social.bund.de/@BNetzA" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>BNetzA</span></a></span> ...</p><ul><li>Soweit ich weiß ist <a href="https://infosec.space/tags/CB" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>CB</span></a> sowieso <em>"Tertiärnutzer"</em> im 27MHz-Band und ne Menge <a href="https://infosec.space/tags/Funkfernsteuerungen" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Funkfernsteuerungen</span></a> nutzen (wenn auch kryptographisch schwache) <a href="https://infosec.space/tags/RollingCode" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>RollingCode</span></a> / <a href="https://infosec.space/tags/Fibonacci" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Fibonacci</span></a>-basierte <a href="https://infosec.space/tags/Verschl%C3%BCsselungen" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Verschlüsselungen</span></a>, wobei im <a href="https://infosec.space/tags/ISM" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ISM</span></a>-Band dann ja auch harte <em>"Sendedauer"</em> - Grenzen gibt...</li></ul><p>Wobei im Zweifelsfalle <a href="https://infosec.space/tags/AX25" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>AX25</span></a> auf CB mit verschlüsselten Datenpaketen die Forderung nach "Offenem Standard" erfüllen sollte.</p><p><a href="https://infosec.space/tags/NotLegalAdvice" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>NotLegalAdvice</span></a></p>
IT News<p>Reverse Engineering a Better Night’s Sleep - All you want is a decent night’s sleep, so you decide to invest in one of those fa... - <a href="https://hackaday.com/2023/06/06/reverse-engineering-a-better-nights-sleep/" rel="nofollow noopener" target="_blank"><span class="invisible">https://</span><span class="ellipsis">hackaday.com/2023/06/06/revers</span><span class="invisible">e-engineering-a-better-nights-sleep/</span></a> <a href="https://schleuss.online/tags/reverseengineering" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>reverseengineering</span></a> <a href="https://schleuss.online/tags/tempur" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>tempur</span></a>-pedic <a href="https://schleuss.online/tags/homehacks" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>homehacks</span></a> <a href="https://schleuss.online/tags/packet" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>packet</span></a> <a href="https://schleuss.online/tags/remote" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>remote</span></a> <a href="https://schleuss.online/tags/si4431" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>si4431</span></a> <a href="https://schleuss.online/tags/salae" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>salae</span></a> <a href="https://schleuss.online/tags/ism" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ism</span></a> <a href="https://schleuss.online/tags/psk" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>psk</span></a> <a href="https://schleuss.online/tags/spi" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>spi</span></a></p>
Till Sawala<p>I'm organising the <a href="https://mastodon.social/tags/astrophysics" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astrophysics</span></a> seminar at <a href="https://mastodon.social/tags/HelsinkiUniversity" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>HelsinkiUniversity</span></a> and looking for speakers - particularly outside my own field, computational extragalactic astrophysics.</p><p>So, if you're studying the solar system or <a href="https://mastodon.social/tags/asteroids" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>asteroids</span></a>, <a href="https://mastodon.social/tags/exoplanets" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>exoplanets</span></a>, <a href="https://mastodon.social/tags/astrobiology" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astrobiology</span></a>, <a href="https://mastodon.social/tags/stars" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>stars</span></a>, star clusters or the <a href="https://mastodon.social/tags/ISM" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ISM</span></a>, observing the <a href="https://mastodon.social/tags/Galaxy" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Galaxy</span></a>, other <a href="https://mastodon.social/tags/galaxies" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>galaxies</span></a>, or the high <a href="https://mastodon.social/tags/redshift" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>redshift</span></a> universe, or work in another field of <a href="https://mastodon.social/tags/astronomy" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astronomy</span></a> and you'd like to share your research with us in an online <a href="https://mastodon.social/tags/seminar" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>seminar</span></a>, please get in touch! </p><p><a href="https://mastodon.social/tags/astrodon" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astrodon</span></a></p>
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