Some programming concepts

Library: Lets take for example. You write code that prints Hello World to the screen. Someone refines it and maybe it starts to ask input before printing. Someone again adds different text formatting to it and you no longer need to rewrite the same code ever again to achieve that functionality.

Framework: Imagine you are builing a house. and you get a system that provides the scafflolding, foundation and the frame at the same time so that you don't need to redo most of the work. This is like a library on a grander scale- flexibility/functionality is reduced.

SDK: In the old days - one would get a software development kit (something like pictured below). But it would be filled with floppy disks, documentation books etc. So it was an actual kit!

Class: This is a template\blueprint or a recipe list.

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Django & Firebase - A marriage of awesomeness

Requirements 1) Django (obviously) 2) Pyrebase (pip install pyrebase, you know the drill) So to give a better appreciation- I will first show you the HTML way then I'll proceed to show you how its done in Python. METHOD 1 : The HTML way Then you need to go to the firebase console. To setup a new project. After that you will see a web setup and you select that. Once selected you will see the config. It should be similar to this : Now that you have configured firebase, we now need to select the components which will be needed. depending on what you want for your app- you can now select the modules that you need. For us today, we will do the login authentication. Make sure you include firebase app first, so this is my screen: METHOD 2: Enter Python Open your dev environment and create a file named pyrebase_settings within your django app folder. In it, you will have the following: Now, lets go to views.py!

PRG, PRF, PRP in Cryptography - What are they?

So I have been reading up on my cryptography and I figured I should give out a brief lesson on these three amazing concepts What are they ? a) PRG (Pseudo Random Generator) You probably know the difference between stream and block cipher. One of the main differences between them is key size. Stream ciphers require the key to be of equal length of greater than the plaintext , whereas Block Ciphers take a key smaller than the PT and is then expanded. This is the PRG The PRG expands the seed Considerations: Stream Ciphers base on Perfect Secrecy whereas Block Ciphers base on Semantic Security b) PRF (Pseudo Random Function) Lets share a secret- imagine something- you want to authenticate yourself with me by proving that you know a secret that we both share. Here's a possible option i) Possible Option 1: PRNGs We both seed a PRNG with the shared secret, I pick and then send you some random number i. You then have to prove that you know the s...

Making money with the falling rand: Lessons from Zimbabwe

It is no secret that the rand is falling like there is no tomorrow. This year alone it has fallen by over 18%. And if you look closely, at the last 3 years- it has fallen by 35%! This is not neglecting the economic setup where the slightest thing leads to ‘ toi toi. ' This trend of continuous striking and pay rate increase bargains has created such a vicious cycle. Prices rise, people strike, economy starts going through stuff. And we back at square one. We all know for sure that this cycle is bad. Zimbabwe and South Africa might not be different soon, only difference being that Zimbabwe chased the farmers, South Africa is chasing stabilisation. (Maybe the paradox of thrift (prompted by the large population) will save them! Hope so.) In Zimbabwe 2008, a lot of people made a lot of money from ‘burning money’. This was whereby people took advantage of the bank rate versus the ‘streets’ rate of forex. The streets rate for forex was lower than the bank rate. Problem wa...

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