.jam's Cryptography Tutorial - One Time Pad

[them22dayz1]

what if: Plaintext = Zoo and the Key =Zeb, what will be the Ciphertext?

[Flickchaser]

Plaintext-Mute the sound!!

[hbar45]

Lol, now all we need is a random number generator to randomly match numbers to each letter of the alphabet. Lol I just got an idea. Apply OTP to another message where the key is completely different. Risk of delivering the key has been doubled, but unbreakability has also been doubled (exponentially? hehe). I wonder if int'l intelligence agencies will look at this comment and say "LOL WTF? Nice idea tho". I'll try that...

[GMSamuelRhine]

can you message me exactly how you do this. i know how to make a system for converting text to number and how you can make a key but im not really sure how you use it together. doesnt really make much sense

[georgetroulis]

Now I need to find a way of making this encrypter in matlab! Not so easy :(

[arturo00]

No... Just no : /

Flushot is right. You didn't explain one-time-pads. You see, the most important part about OTPs is that the keyword (the "pad") needs to be at least as large as the message, it can't be re-used, and must be truly random. Neither computer "random" functions nor rolling your face against the keyboard are valid methods.

[codelyokoblue]

do you have to use 5 numbers for each letter or can it be just two?

[codelyokoblue]

is it true that you can use 10-sided dice to get truly random numbers?

[budsmokersonly2008]

@codelyokoblue u can use any die to get random numbers, are you dumb?

[codelyokoblue]

@budsmokersonly2008 Yes but with a 10-sided die you can get all 10 numbers on one die and it balances out get it? you have all the numbers so it is perfectly squared oh and don't call me dumb faggot your the dumb one

[budsmokersonly2008]

@codelyokoblue ummmm last time i checked 10 isn't a perfect square, so thank you for proving my point, and that is that you are dumb.

[shadowspheretheband]

b b u m b  u

9 7-25-31 9-31

:D

[Flarrm09]

This isn't how ASCII encryption works - A-Z in ASCII are the hexadecimal numbers 41-5A.

[jennydisini]

thanks for posting this. Now i can see how hard it was to transmit these signals in WWII. Those radio operators must've been really scared.

[thechaosgladiator]

where's the concept of "oNE TIME pad here?

[JAManimations]

Once you use the Pad (Key) it becomes unsafe. If you wanted to understand the "ONE TIME" part, that's it.

[BRjp007]

i dont understand how you make the cipheretext...

[GalacticMovieFilms]

hey dude this is an awsome and simple way of explainig it but im wondering how this cna be implemented in programing? say to make a im program that encrypted the message, passd over net then reached intended destination and decrypted. hav any thaughts on that?

[JAManimations]

oh man sorry i acidentally ... your whole comment.

[flush0t]

What you explained is a substitution cipher. Although learning letter substitution is necessary to understand the concept of OTP, it doesn't explain OTP itself.

[JAManimations]

you didn't watch until the end did you?

you substitute to add to the key, THEN you substitute BACK... that WAS OTP.

[flush0t]

You were on the right track, although what I was getting at is that you should elaborate more on the concept of OTP itself, since simple substitution is only a part of it. You share a pad with someone else that consists of the same long random key, destroying each character as you use it (and never reusing the key), hence the "one time".

[Peeki]

lols, i dont know what a onetime pad is so thats why im here, so, basicly...

i have a pad with the word "one" on it,

my friend has a pad with "pad" ...

and i wanta send him abc,

id be using a-z, a been 1 and z been 26

id be 1,2,3

14,13,4 (one)

15,0,3 (pad)

wait im lost,... lol

[MrKohlenstoff]

Well.. even though the video doesn't seem to be quite actual... it would probably be good if you explained why one time pads are 100% secure. ;) I don't think everyone watching this video understands the sense behind it. You might should have mentioned that Brute Force doesn't work as decrypting-method and why. Apart from that.. well.. the method gets clear, but the principle imho doesn't. So maybe some more meta-explanatations would help. :) Otherwise good work.

[JAManimations]

WOW @ BIG COMMENT!

I might make another one, but real video, i got my camera fixed

[Lobogood]

That tutorial is hard to comprehend, but after 2 or 3 views you get to understand the idea. Congrats, it's very good. Where you learned to do this? Books or net?

BTW the song is good too

[JAManimations]

net ftw! well... ur pretty right... its quite complicated

[xrayrep]

Hard to understand??? You're kidding! I thought it very simple and very understandable. Just take some time to THINK about it, and you will see that it makes perfect sense.

[Lobogood]

That depends depends a lot on which person is watching the video...

[LineRiderGjert]

didn't understand a thing xD

[limesfar]

makes not that much sense to me, but cool!

[JAManimations]

lol, you didnt seem like the smart kind to me since the start... XD!

jk...

what didnt make sense?

[limesfar]

wow u suck ty

[JAManimations]

lol... cool man... just kidding! i didnt thought u would be mad... srry

[limesfar]

its ok lulz xD