| Concealed USB disk Stealth flash drives for data smuggling |
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| GPS for distributed power generator synchronization Using GPS as a timebase to keep power generators across an area in-phase during outages, symplifying outage recovery. |
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| Standby Power Saver Power saving approach for standby devices |
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| Autolinks for revealing PR campaigns How to combine a database of front groups and astroturfing organizations with mass media information in near-real time, revealing possible disinformation sources. |
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| DTMF Challenge-Response over telephone Acoustically coupled device for challenge-response authentication over phone line |
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| IrDA-to-remote converter A device converting IrDA commands to infrared remote ones |
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| Universal Chip Programmer How to solve problems with support of various chips by various programmers. |
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| Cheap multispectral imaging Low-cost thermal/multispectral imaging via mechanical slow-scan TV |
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| Thunderstorm Gun Lightning-powered electromagnetic pulse gun |
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| EU solder drawbacks Another of the long chain of Euroidiocies |
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| Micropower RFID jammer Very-low power passive/active jammer of passive RFID tags |
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| Evading detectors of radar detectors Speculative design proposal of an undetectable radar detector |
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| Distributed UPC/EAN Database How to design a system for querying all kinds of information from a product using its UPC/EAN code and a set of public databases |
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| Secure One-Time-Pad Storage Device Storage device for one-time pad data. A chunk of data, after being written in, can then be read only once. |
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| Shipping Encryption Keys How to ship one time pads and encryption keys by mail in a strongly tamper-resistant way |
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| Defeating keyword scanners with WebFonts How to use simple substitution cipher together with downloadable WebFonts to work around automatic communication scanners |
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| Denaturated alcohol purifying How to make denaturated alcohol suitable for human consumption |
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| Ultracheap IR spectrometer Very cheap infrared spectrometer without monochromator nor expensive optics (speculative proposal) Update: Won't work as proposed. |
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| The real danger of role-playing games When RPG model becomes realistic enough, it turns into tactical simulation and gaming becomes training. |
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| Broadcast technology convergence The inevitable convergence of Internet and terrestrial broadcasting technologies, and the consequences. |
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| Filesystem-independent file storage How to store critical files in the way they can be read back from the disk even if all filesystem metadata are gone |
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| GPG signatures in HTML GPG signing of parts of HTML documents, and of included images and binary files |
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| Meta-filesystem Filesystem containing its own driver in bytecode |
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| Small-volume concealed data storage Little, easy to hide wireless storage and retrieve of an encryption key, based on AT24RF08 |
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| Homemade Passive Radar System (GNU/Radar) Community-based passive radar, deployable by private personnel without links to military |
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| Physical security tricks Paranoia add-ons for an alarm system when the threat model includes high-profile adversaries like police or "Agencies". |
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| Dedicated Event Logger Small, battery-operated concealable event logger for post-breach security audit applications (aka detecting black-bag jobs) Excerpted from Physical Security Tricks |
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| Ultimate CD auditing Low-level access to data stored on a CD, on the level of pits and lands |
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| Securing data transfers by securing a small shipment against tampering Shipping data sequentially as two parts - random key and data XORed with random key, sending the other part only when the first one arrived untampered with |
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| Cooking Temperature Sensor Rugged, wireless small-distance passive temperature sensor |
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| Rogue DNS resolvers Smaller-scale temporary countermeasure against domains being shut down |
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| Snort/Tripwire for RF spectrum Permanent scanning of electromagnetic spectrum, detecting bugs and other transmitters |
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| Infrared broadcasting Local broadcasting using infrared transmitters, sidestepping low-power broadcast regulations |
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| DNA evidence countermeasures? Possible jamming of DNA tests on biological traces; speculative proposal |
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| Closed-circuit teletext Inserting teletext to standard video signal, allowing using a common TV as a monitor with text overlaid over live video |
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| Surveillance cameras detectors Detecting surveillance cameras by characteristical frequencies in their EM spectrum; speculative design proposal |
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| Transparent encrypting email server POP3/SMTP proxy for securing the transport layer between the sender and the recipient. Now already implemented by eg. GPGrelay. |
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| RAM/ROM drive - tamperproof secure disk encryption boot IDE-compatible solid-state tamperproof encrypted unit, PIN-protected, limiting number of bruteforcing attempts to get stored key, suitable to boot from. Possibly obsoleted now by more modern designs. |
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| Transporting larger amounts of money Cash is too bulky to transport bigger amounts of it comfortably. Other media are necessary. |