Think of buffer as just another word for an array, list, whatever resonates with your programming experience. Learn more on How Stuff Works: How Bits and Bytes Work and the Arduino Bit Math Tutorial to learn more about it.

Puzzled? Remember that 3 decimal numbers also don’t just stand for 3 values between 0 and 9, but 1000 (10 3) permutations from 0(00) to 999. Thus, one byte can represent a decimal number between 0(00) and 255. A byte is not just 8 values between 0 and 1, but 256 (2 8) different combinations (rather permutations) ranging from 00000000 via e.g. A bit is the most basic unit and can be either 1 or 0. Even a single bit 1 would do! What is a byte? #Ī byte is a group of 8 bits. Fortunately, you don’t need a picture of that smart garage bin that needs to emptied. The unprecedented range of the LoRaWAN technology we build on comes at the cost of low bandwidth and limited airtime (the number times size of packages you send). This guide will help you encode different types of data in as little bytes possible. Note that RSA keys can vary in size.įor further information you can probably take a look at this page, which describes the structure of RSA keys and probably the wikipedia page of RSA in general.To send data back and forth over The Things Network you’ll need to use bytes. Thus you know that in this case your public key modulus is 2048 bit. the next four bytes are 0x00 0x00 0x01 0x00, indicating that your public modulus is 0x0100 byte long (which translates to 256 bytes - which translates to 2048 bits).then you have 0x25, which is your public exponent.the next four bytes are 0x00 0x00 0x00 0x01, indicating that the next one byte describes your public exponent.then you have the next seven bytes: 0x73, 0x73.The first four bytes are 0x00 0x00 0x00 0x07, indicating that the nextįield you have to read is seven bytes long.If you decode this string, you can have a look at it byte-wise. So its basically not really readable to humans. What you have posted is a base64 encoding of an ssh-rsa public key. I try to break it down quite simple and answer your initial question. How large a 'file' would that public key be? But I want to try to 'understand' what bits/bytes even means in the first place.Īny clarifications would be greatly appreciate. Say I had 100 sets, each with 1000 terms. Really I want to know how much storage on a computer such a key would take up. This is vastly different than the above example, so how do I work out the bit size? Or am I asking the wrong thing here? Their sizes are 100 and 150 respectively. Say I have two sets of integers, $S_1$ and $S_2$.

Ultimately, I have a different public key that I wanted to work out the size for. But I have no idea how that would relate to the above? I understand that an 8 bit block is 1 byte, that is to say that we have a length of 8 characters that can be 1 or 0. If someone could explain the logic I am missing here, that would help a lot. These often talk as if you understand what they mean, so I don't have much to go off of. How do I work out the bitlength of this key? There are 368 characters, so is that the bitength? That would then mean that this is a 46 byte system, right? I barely grasp what that means, and I've sank a week or two into Wikipedia articles, YouTube tutorials and more. I am struggling to understand what the 'bit/byte' size of a public key is, how you can work it out, and even what it means.ĪAAAB3NzaC1yc2EAAAABJQAAAQB/nAmOjTmezNUDKYvEeIRf2YnwM9/uUG1d0BYsc8/tRtx+RGi7N2lUbp728MXGwdnL9od4cItzky/zVdLZE2cycOa18xBK9cOWmcKS0A8FYB圎QWJ/q9YVUgZbFKfYGaGQxsER+A0w/fX8ALuk78ktP31K69LcQgxIsl7rNzxsoOQKJ/CIxOGMMxczYTiEoLvQhapFQMs3FL96didKr/QbrfB1WT6s3838SEaXfgZvLef1YB2xmfhbT9OXFE3FXvh2UPBfN+ffE7iiayQf/2XR+8j4N4bW30DiPtOQLGUrH1y5X/rpNZNlWW2+jGIxqZtgWg7lT圓mXy5x836Sj/6L

256 bits in a byte