Studying a code in cryptography

Question

So,i'm given a binary code $C$ with it's generator matrix $G=(A,B)$ where $A,B$ are given matrices. The task is to study the code.

First question: What does this form $(A,B)$ mean? how would $G$ look like?

Second question: When it says,study the code,what should i study? What are the usual things that i should search?

I'm new in cryptography,so any help would be very much appreciated!!!

Answer 1

My first approach

1. Count the number of characters you think makes up the cipher Is the count > or < the 26 alpha plus might there be numbers included

2. Count the occupancies of each unique character

3. Can you get a count of the vowels, see if this knowledge developed a possible word

4 can you pick out the characters that MIGHT be a space

5. From this information, try to establish a pseudo algorithm

This is always my first step

Good hunting