Hello could anyone please explain this to me? It's a question that I have to know the answer for so my teacher doesn't fail me in class... I tried google and it didn't work!
There was a book I read back in elementary school maybe around like 2007-2009 and I was obsessed with it. There was this girl who went to an arcade and got strapped into a VR game. It put her in some fantasy world where she was a princess and people were trying to assassinate her. She only had a few lives and could only leave once she beat the level somehow. If she lost all her lives then she died IRL.
That's all I can really remember from it. I've been searching for this book for ages, but I haven't been able to find it since. I just want a little nostalgia trip.
#OctopusProtocol tracks the price of any real-world asset through the use of oracles that send information from real-world to smart contracts.
https://octopus.exchange
$OPS #synthetics
https://preview.redd.it/mewdb4lvc2c81.jpg?width=1024&format=pjpg&auto=webp&s=5e840cd119e6c21391d96e38915d5681166ca35b
The Transport Ministry will examine the anti-COVID-19 protocols of Vietnam Airlines after its flight attendant sparked fresh coronavirus community transmissions in the country.
LoRa is "Long Range" radio. For the purpose of this post just think of it as WiFi but much longer ranges (realistic shots can go further than 10 km) and typically less-than dial-up speeds. If you want to read more, have at it: https://en.wikipedia.org/wiki/LoRa
This project is primarily a learning exercise for me. I'm writing a python library that acts as an API between the radio hardware itself (communicating via serial interface) and any python program I could ever want to transmit data out of. I have hopes of expanding it further to add more capability as I go. Again, this is all a learning exercise for me. I'm potentially reinventing a wheel here just so I can learn how the wheel was invented. I completed phase 1 of my proof of concept yesterday with a successful field test.
The problem I'm running into is packet size. I have UP TO 240 bytes (characters) to play with and that includes packet metadata such as the "to" and "from" fields. It seems like a lot to play with but I'm finding that encrypting my data payloads adds a tremendous amount of overhead after the considerable overhead from the metadata.
I already have Diffie Hellman Key Exchange operational between two radios. With a full DH exchange coupled with encryption via a simple substitution cypher (for now) then fragmenting the encrypted payload I'm able to transfer ~120 bytes of data with ~1200 bytes of transmission in ~18 seconds. I have a decent amount of room to reduce my metadata overhead and overhead from how I encode the encrypted data payload and will implement the majority of those optimizations in my next round of development.
Some additional considerations/challenges:
- I have to assume the radio net is not secure. Anyone could be monitoring it. Data payload must be encrypted.
- The key exchange must occur over the radio net.
- I'm not focused on authentication right now but I have no idea how to best authenticate the identity of the receiver yet. I'm open to suggestions. I may leave that up to the application layer as I'm more focused on data assurance at the transport layer by providing the application a standardized API to send data to the destination using a transport layer secured "channel" with confirmation the data reached its intended destination intact.
- Data transmission may require relays between the sender and receiver. These relays should not be able to realistically decrypt the data.
- 240 byte packet
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The Transport Ministry will examine the anti-COVID-19 protocols of Vietnam Airlines after its flight attendant sparked fresh coronavirus community transmissions in the country.
The Transport Ministry will examine the anti-COVID-19 protocols of Vietnam Airlines after its flight attendant sparked fresh coronavirus community transmissions in the country.
The Transport Ministry will examine the anti-COVID-19 protocols of Vietnam Airlines after its flight attendant sparked fresh coronavirus community transmissions in the country.
The Transport Ministry will examine the anti-COVID-19 protocols of Vietnam Airlines after its flight attendant sparked fresh coronavirus community transmissions in the country.
The Transport Ministry will examine the anti-COVID-19 protocols of Vietnam Airlines after its flight attendant sparked fresh coronavirus community transmissions in the country.
