ave you ever heard of cryptography?
People
write their diaries every day. For many of them, their diary is one of
their best friends to whom they tell their every secret. What happens
when someone else finds such a diary? That would freak out the dairy's
owner for sure. Also, it might put their lives in danger.
Wise
men always hide their diaries so no one else finds it. But legends
hide their message so that only they can read what they wrote. So even
if the diary is found by someone else, they cannot know the secrets.
for example, I wrote this in my diary today.
P dyval h isvn wvza hivba jyfwavnyhwof avkhf
Can
you understand it? This is just a very primitive level of cryptography
yet powerful enough to hide what I wrote from 90% of people. I will
discuss this type of cryptography in the next blog post.
The
human used cryptography from the very beginning to share their messages
in secret and conceal their inventions. As you may know, many people
tried to find a recipe that turns any metal into gold. These people
always used cryptography to conceal their secrets.
The
art of cryptography was rapidly improved during wars. As enemies always
tried to "crack" the encryptions, they always had to strengthen their
existing encryption algorithms and techniques.
Try to decode the note I wrote in my diary today.
Hope you learned something new and follow my blogs for more articles on cryptography.