red0point

11 ms·

91.
by red0point 6y ago
Well forgive me but I was hoping for more than a first hit from Google and apparent common knowledge. Since you mentioned having read studies about airborne transmission and aerosols, I was hoping you could point me to one where they examin
92.
by red0point 6y ago
Do you have evidence to back up your claim that properly worn EN14683 IIR masks are not sufficient?
93.
by red0point 6y ago
True, however it makes sense if you look at the figure they provide, which shows airflow and infections: https://jkms.org/ViewImage.php?Type=F&aid=694440&id=F3&afn=6... If it were contact based, this would mean
94.
by red0point 6y ago
Well this is clearly stated in the paper. * Only the visitors (cases A and C) sitting in the air flow path of case B were infected with COVID-19, while other visitors (V2, V3) closer to the infector for a longer period of time but in the ab
95.
by red0point 6y ago
There‘s also Amarisoft, which does it in „real time“ in software, but not open source. I believe srsLTE, used to turn SDRs into eNodeB/UEs, adds support for 5G soon (tm).
96.
by red0point 6y ago
If you don’t want to change SIM cards, you cold go to 2G and easily create a fake base station and disable 3G/4G on the phone. For 4G, it‘s a bit more tricky as you need to do a relay attack ( https://alter-attack.net/ )
97.
by red0point 6y ago
Well not easily, because once the outer TLS has been set up, you can‘t see the contents of the second TLS handshake. You could maybe deduce it via packet sizes and timings, but certainly not pretty easily.
98.
by red0point 6y ago
When cellular data is disabled (assuming it really is, not just faked to the user), then the corresponding radio bearers for user plane data habe not been established, thus no data-stream can travel with it. You can only communicate with th
99.
by red0point 6y ago
Not directly, as the flight mode really prevents any radio communication (it takes a bit to shut down as it sends a NAS Detach Request first and waits for a reply for a few seconds). However, there is also WiFi Calling - in that sense, your
100.
by red0point 6y ago
Their research group actually went down a similar road, and explored a possible design of an anoymous communication network on top of SCION, called HORNET - check this out: https://netsec.ethz.ch/research/anonymity.php
101.
by red0point 6y ago
As addressed by the author, Dr. Markus Legner, these points are not true for SCION, as it is a path-aware routing system. Especially the paths cannot be spoofed, as their MAC is checked at each router hop (an extremely efficient operation
102.
by red0point 6y ago
Cool solution, however, what does CC stand for?
103.
by red0point 6y ago
While it's a cool result, I think the security of this is really lacking. The author mentions to not want to expose the Rasperry Pi to the internet due to security reasons, but then does so anyway through a reverse proxy, which doesn&#
104.
by red0point 6y ago
I don‘t know about 3G, but I just checked for LTE [1] and the timing is broadcasted in SIB16, which is not encrypted, so theoretically anything could pick it up. [1] https://www.etsi.org/deliver/etsi_ts/136300_1363
105.
by red0point 6y ago
No need to think that far. Just calculate the hash of the video file stored on camera (or segments of it during e.g. live stream) and authenticate this using a private key stored in a secure element on the camera. Do you trust this secure e
106.
by red0point 6y ago
Sure you can use Big O, just look at it as the expected runtime. For example, QuickSort is O(n^2) in worst case, but expected O(nlog(n)).
107.
by red0point 6y ago
I‘m not sure why you‘re bringing concurrency to the table. My point still is that looking something up in a stack (did I visit this node?) costs O(n) time, so the BFS will degrade from O(m+n) to O(m*n+n). To come back to the concurrency, if
108.
by red0point 6y ago
1) If it‘s a tree, it ain‘t got no loops 2) The stack isn‘t to deal with loops, the „visited“ flag at each edge is there for that. The stack (for DFS, BFS would be a queue) is there to keep track of which nodes have been visited such that y
109.
by red0point 6y ago
May I ask from which provider you are getting this VPS? 20USD for unlimited 10Gbit/s bandwidth sounds a bit too good to be true.
110.
by red0point 6y ago
For the ML models you can also switch to dedicated server providers, such as: https://www.dedispec.com/gpu.php For storage, there‘s always Wasabi / B2 with S3 compatible interfaces. If the data itself is not changing t
111.
by red0point 6y ago
Valid point. DP3T (in one configuration) adresses this and lets you filter out certain parts that you do not wish to disclose. Thus, this then requires you to upload all broadcast identities used in the relevant timeframe, but because of sp
112.
by red0point 6y ago
Great insight. Additionally, an attacker could gain long-term visibility of the cameras footage, simply by continuously capturing the broadcasted keys via a covertly placed device, either in close proximity to the camera or further away wit
113.
by red0point 7y ago
I bet they‘re using exactly your tool internally ;)
114.
by red0point 7y ago
They are airtight in this study. From the abstract: When tested with tightly sealed sides, salt-coated filters showed remarkably higher filtration efficiency than conventional mask filtration layer, and 100% survival rate was observed in mi
115.
by red0point 7y ago
Just use regular Reed-Solomon for the data and Shamir's Secret Sharing for the key (an implementation is for example http://point-at-infinity.org/ssss/ ). If you choose the same parameters for both algorithms, you
116.
by red0point 7y ago
This is unsafe and should not be used. This is simply splitting the key in multiple pieces, thus for every piece you have, you gain additional information about the key, allowing for exponentially easier brute-forcing of the remaining key.
117.
by red0point 7y ago
And how will you monetize it when all premium features are free? Will there be premium-premium features that require payment?
118.
by red0point 7y ago
Original Source: https://ethz.ch/en/news-and-events/eth-news/news/2019/07/wha...
119.
by red0point 7y ago
In Zurich, the maximum base fare is 8 CHF, while the maximum price per kilometer driven is 5 CHF [1]. UberX currently costs 1.80 CHF per kilometer [2]. It's not all that unrealistic to assume that this cost will go down to 56 Rp. when
120.
by red0point 8y ago
But what if I (or all passangers) want to get off at the next stop?

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