@badlydrawnturtle8484
It's one of those "wow" moments when I realize you're talking about the proliferation of powerful quantum computers as inevitable, when it feels like just yesterday it wasn't clear if they could even exist.
@DeclanMBrennan
5:18 Ah "Infinite Series" - in a parallel universe, you're still making fun Math episodes that are the perfect complement to the fantastic PBS Space Time. Alas the yang has disappeared from our universe so we have to satisfied with yin alone. Please PBS consider reforming this quintessential duality.
@HansPetterBekeng
You're one of those Youtuber's whose voice, accent, and narrative skills make you so pleasant to listen to one could listen to you narrate paint drying. Add to that the fact that you actually talk about awesome and interesting and fascinating stuff, and have an outstanding ability to convey all this advanced and complex science to us, ordinary people, in more or less understandable ways, and the fact that your humor is the dryest ever, and you're by far one of my favorite Youtubers to watch. BTW, don't mistake me calling you a Youtuber for me not acknowledging you're actually a professor in astrophysics at NY City University, and I also think it's awesome so many actual scientists have found their way to Youtube, and if nothing else, we can actually thank Covid-19 and the Coronavirus for quite a few finding their way just this year. My favorite is Sean Carroll and the great questions podcast thingie he does. Not as soothing voice or accent as you but a truly great explainer of science and astronomy too. Anyway, you're welcome for me watching all your videos, and thank you very much for making all your videos. They are very much appreciated. Love from Norway.
@NourSelim0
That bit about the hypothetical life inside stars being very ancient immediately made me think of the Doctor Who episode "Rings of Akhaten" (S07E07), search for the doctor's speech in that episode, it's amazing!
@kelpsie
Ah, Infinite Series. Still a fresh wound after all this time.
@BunnyOfThunder
I heard "lettuce-based cryptography" and I'm sticking to it.
@TheRealFlenuan
me, connecting to quantum internet: Please wait. There is a 67.5±2.9% chance that the webpage is loading
@manoftheforest7505
1:16 "A quantum computer that could factor a prime number in a human lifetime, or a human lunchbreak" -> I don't need a quantum computer for that. ;)
@9279chomp
That color analogy is spot on. Wish my lecturers explained it that way back in college!
@PowerhouseCell
I can already see quantum internet now: "You may or may not have a new message!"
@nishita3084
5:20 Ahh yes, twist that knife in my heart, thank you very much.
@arturomagidin5361
“Factor a prime number” (at about 1:20); factoring prime numbers is really easy! It just takes one step...
@complex314i
Ah yes, RSA. I teach RSA encryption in my Discrete Math course. Since I pointed out your error with the powers of 2, it seems fair for me to share an error I made my first time teaching RSA. A Dumb Error I should have noticed: I was showing an example using "blank space = 0" "A = 1" "B = 2" ... "Y = 25" "Z = 26" and then RSA encrypting those numbers. RSA encryption begins with two primes. I had decided to let the class decide what two primes we would use. The class chose 3 and 7. If you are familiar with RSA then you like notice what I should have and asked for two different primes. I could encrypt without a noticable problem. As for decryption, most numbers decrypted correctly, but those that should have decrypted to the last few letters in the alphabet did not decrypt correctly. Then the obvious dawned on me. 3×7 = 21. The product is the mod for encryption & decryption. The mod MUST be at least 27 so we can have a all room for all 26 letters and the 0 for a space.
@andreubotella6464
"Every email ... is secured by the fact that it's a lot harder to factor out prime numbers". Uh, fun fact, email isn't typically encrypted. You can explicitly encrypt your emails, but that's not very commonplace, and it's something you have to opt into. You can use email services that will only enable you to access your inbox through an encrypted connection (such as Gmail), and emails between users of that same service would presumably not leave that service's servers unencrypted. But for anything else, who knows how many of the steps an email goes through from the sender to the receiver use an encrypted connection. It's probably few of them.
@mina86
4:16 – that’s a Diffie–Hellman key exchange, not RSA. Wikipedia entry on DH even has the exact same visualisation.
@axyte535
When trying to break a quantum encryption, this message will pop up: “Your password is both correct, unknown, incorrect, blue, seven, yes, The Rock, and everything inbetween until it is set. Would you like to try again?”
@under_score3829
"Do you guys just put the word Quantum in front of everything?" -- Ant-Man.
@shoesncheese
That color mixing example 3:26 helped me understand public / private key crypto more than reading books on the subject has.
@nishatiwari9212
he missed the 512 in the powers of 2
@pbsspacetime