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TO GENERATE AN ENCRYPTION KEY : 2 CASES

 

FIRST CASE :

The key can be stored in your brain. In this case a complex key should be used. This could be a precise sentence like "Blue is my favorite color20180416" which is easy to remember.

You store it in a file, whatever its extension.

 

SECOND CASE :

You can generate a precise size random key via a seed you choose : a key is unique to its seed

 

* You specify the size of the key (number of characters) ;

 

* You choose the seed ;

 

* You generate file containing the key ;

 

* You use the key file to cypher

 

* You save the key file in a secured place. Losing the key file will reduce your chance to uncypher your file to zero

Done