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Cake day: June 26th, 2023

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  • Oracle trilateration refers to an attack on apps that have filters like “only show users closer than 5 km”. In case of the vulnerable apps, this was very accurate, so the attacker could change their position from the victim (which does not require physical movement, the application has to trust your device on this, so the position can be spoofed) until the victim disappeared from the list, and end up a point that is almost exactly 5 km from the victim.

    Like if it said the user is 5km away, that is still going to give a pretty big area if someone were to trilateral it because the line of the circle would have to include 4.5-5.5km away.

    This does not help, since the attacker can find a point where it switches between 4 km and 5 km, and then this point (in the simplest case) is exactly 4.5 km from the victim. The paper refers to this as rounded distance trilateration.




  • In Poland:

    • driver’s permits are not a thing. In general, it’s illegal to drive without a professional instructor (with parents, for example) before getting a driving license, though a lot of people, especially in the countryside, will still do so,
    • you can only drive after turning 18. You can start the course a few months earlier, but you can only take the final exam after you turn 18 (there exists a category that allows you to drive after turning 16, but it’s limited and IME extremely unpopular),
    • you need to go to a paid course, which includes theory classes and at least 30 hours of driving with the instructor,
    • most people drive in a car owned by the instructor or the driving school, as the car must have another pair of brakes for the instructor,
    • you need to pass a theoretical and a practical exam in one of the centers (Wojewódzki ośrodek ruchu drogowego),
    • the theoretical exam is just closed questions. You need to get 68 out of 74 points, but (AFAIK, this has changed over time) all the questions are known, so people will just cram them,
    • the practical exam is first some maneuvers on the center grounds, and then a ride around the city. The exam is rather objective and is failed if you do any big mistake or fail any exercise twice,
    • the exams are not easy. The data I found is for each WORD, but in general I feel like the pass rate is around 50% for the practical exam and 70% for theory. It’s not incommon for somebody to only pass their practical exam on like 5th attempt,
    • there were supposed to be some restrictions for new drivers, but they had been discussed for a long time, even back when I passed my license before the pandemic, and I have no idea if they ever actually came into force,
    • some people think that the system is super flawed. Here’s some discussion by the Supreme Audit Office in Polish: https://www.nik.gov.pl/aktualnosci/system-szkolenia-kandydatow-na-kierowcow.html,
    • costwise, it’s apparently like 4000 zł for the course right now. Exams are paid per attempt, 50 zł for the theory and 200 zł for practice. 1 euro is 4.33 zł as of writing, but you need to take into account the difference in purchasing power and it’s probably not much cheaper than Germany even if you pass both exams the first time.



  • As a data point, I have a Green Cell battery in my X220. I have bought the battery on July 24, 2022 and I have been using my X220 regularly but lightly. The battery was marketed as 6600 mAh at 10.8 V. As of writing, the OS reports design capacity of 73.26 Wh and current capacity of 60.6 Wh:

    POWER_SUPPLY_NAME=BAT0
    POWER_SUPPLY_TYPE=Battery
    POWER_SUPPLY_STATUS=Discharging
    POWER_SUPPLY_PRESENT=1
    POWER_SUPPLY_TECHNOLOGY=Li-ion
    POWER_SUPPLY_CYCLE_COUNT=0
    POWER_SUPPLY_VOLTAGE_MIN_DESIGN=11100000
    POWER_SUPPLY_VOLTAGE_NOW=11783000
    POWER_SUPPLY_POWER_NOW=28726000
    POWER_SUPPLY_ENERGY_FULL_DESIGN=73260000
    POWER_SUPPLY_ENERGY_FULL=60600000
    POWER_SUPPLY_ENERGY_NOW=54960000
    POWER_SUPPLY_CAPACITY=90
    POWER_SUPPLY_CAPACITY_LEVEL=Normal
    POWER_SUPPLY_MODEL_NAME=45N1023
    POWER_SUPPLY_MANUFACTURER=SANYO
    POWER_SUPPLY_SERIAL_NUMBER= 9001
    

  • You could make an argument that not using banking apps decreases your security, since most banks use either SMS or those apps as the second factor while confirming the operations. It is true that the apps are of varying quality, but SMS is not really a serious alternative. Some banks do have apps that are limited to confirming operations, and one bank where I live did recently start accepting U2F, which is amazing news.


  • Isn’t this the point though? Like, if you spot that (let’s concretize) the trash is starting to overflow, you can either take it out right now which will take you 2 minutes and (hopefully) barely interrupt your day, or you can add it to your list of things to do. And so you get that list of 59 things by ignoring the 2-minute rule, not by applying it.


  • Honestly I’ve unironically missed the entirety of the image at first, I went directly to the text. And probably a lot of internet-savvy people would, this kind of image is useless decoration 90% of the time and people are trained to not look at it. Same concept as in that research where they asked people to find the current population number on a webpage and they had a very hard time, despite the value being in big red digits or something equally distinctive.