The RSA Encryption Algorithm (1 of 2: Computing an Example)

[DJ_Force]

I have a master's degree in computer science, and this is the best explanation of RSA I can remember coming across.

[mattt]

Man... This is the definition of a good teacher. You can explain things very well and in a succinct manner. Great video!

[ashleypursell]

this is the kind of teacher we all needed in school

[panzonecadutodifaccia]

2 hours of lecture in my uni and I didn't understand shit, 8 min of video and I feel super confident about rsa.
Thanks man you a great professor

[seanmalone]

Not only did I just see the best explanation of RSA encryption that I've ever come across, I got a free yoga lesson as well.

[worldaviationk]

This makes more sense than some other videos that i searched for in other places with the fictional alice and bob. Proper detail like in this video with the actual numbers is far better than other videos i've seen elsewhere

[rish]

I love how you simplify the algorithm & solution. Additionally, that was a great homework assignment to show why we can't rely on approximations stored in calculators for irrational numbers.

[harper]

What a good teacher, you can tell the students are actually interested by how they're engaging as well.

[Jack-dxqb]

Some remarks:
1. The public key is (k = 5, m = 14), where 14 is a modulus (often large) chosen by the recipient, and 5 is an unit mod φ(14). Note that 5 is multiplicatively invertible under mod φ(14), and the inverse of 5 is 5 mod φ(14).
2. φ is the Euler totient function. φ(14) is the counting of positive number that is less than 14 and is relative prime to 14. φ(14) = 6 = (2 - 1)*(7 - 1).
3. The private key is the inverse of k = 5 mod φ(14), i.e. 5 mod φ(14).
4. In the video, we use 11 as our private key since 11 is congruent to 5 mod φ(14). We could use any number that is congruent to 5 mod φ(14), i.e. 5, 11, 17, 23, ... etc.

[mrjohndoe]

I thought RSA meant "Really Secure Algorithm"

[Jinsun]

Being from Ireland, the first couple of times I heard you say "Irish say" I had to remind
myself he's saying "RSA", ha ha. Great lecture, brilliant enthusiasm and
clear explanation, thank you! You're not just a good lecturer, you're clearly also a fantastic teacher.

[chakkerzo_o]

Watching this preping for a Master's degree - so well explained, actually got some insights from this that were not in the University lectures. For a while I was thinking something was wrong, but this actually highlight things in my notes I had failed to appreciate. Good job!

[fabioschmidt]

Every time I don't understand things in my classes in computer science, I get on youtube to find an explanation video about the topic I want to understand. And almost every time I find a video of yours. I like the way you teach and you make it very easy to understand complex things. Keep your work going man, you're great!

[DiwasTimilsina]

Why did I not have you as my teacher? I missed out on so much.
Truly amazing teacher!

[benterry]

You explained clearly in 8 minutes what I couldn't fathom in a 2 hour lecture, Thank you, you're a credit to good teaching.

[prithveen]

If I had a lecturer like this guy, I would ace every subject! Great job man!

[luuk]

This is exactly what I was looking for, makes so much more sense than all the other explanations combined.

[archeopteryxes]

Eddie, you are a genius. I am a math teacher too, and its incredible how much i learn everytime with your videos. Best of lucks in your life!

[SIGSEGV]

Dude you're a great teacher, you seem genuinely enthusiastic

[klevdavful]

Epitome of a good teacher even a newbie can grasps and with enough reps can develope encrypt decrpt skills.