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Cryptography [PART I]

Name: Cryptography 2012-10-16 22:36

Cryptography

Name: Anonymous 2012-12-06 1:40

>>200
do you have teh downz??

Name: Anonymous 2012-12-06 2:05

Interesting. DH *can* actually asymmetrically encrypt short messages directly.

Alice's public key is (ga mod p, g, p), private key is a.

Bob wants to send message 0 < m < p. He picks a random b and sends Alice (m(ga)b mod p, gb mod p).

Alice then computes m(ga)b (gb)-a = mgab g-ab = m.

let's see how long it takes before someone writes a 2 line perl version of this

Name: Anonymous 2012-12-06 2:21

>>202
Congrats, you just invented ElGamal encryption.
http://en.wikipedia.org/wiki/ElGamal_encryption

Name: Anonymous 2012-12-06 3:12

Le Gargamel Encryption

Name: Anonymous 2012-12-06 6:45

http://en.wikipedia.org/wiki/Gargamel#Jew_archetype

Name: Anonymous 2012-12-06 7:06

According to Antoine Buéno, Gargamel is created as an archetypal Jew[4], with a big nose, magic powers, love of gold, and balding looks, Gargamel carries a lot of symbolism.
Terrible!

Name: Anonymous 2012-12-06 13:30

>>203
（　≖‿≖）

Name: Anonymous 2012-12-06 13:31

>>207
>EGIN MEME FACE, GRO!

Name: Anonymous 2012-12-07 15:00

Name: Anonymous 2012-12-07 15:03

>>208
Would you mind repeating that in English?

Name: >>208 2012-12-07 16:50

>>210
"I am a fucking faggot"

Name: Anonymous 2012-12-07 17:56

>>210
>LURK MOAR SUMMERFAG
>>211
>LELLLLL, EGIN!

Name: Anonymous 2012-12-14 1:44

ElGamal looked so simple, I figured I could fit its entire textual description into the size of a MSN icon.

data:image/png;base64,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

Name: Anonymous 2012-12-14 2:20

>>213
Why aren't you using NTRU instead?

Name: Anonymous 2012-12-14 2:24

>>214
It's ugly, patent-encumbered and GPG doesn't support it.

Name: Anonymous 2012-12-14 2:30

>>214
There's something about CVP/SVP and LLL I never understood though. What is the run-time complexity of the LLL algorithm when searching for short vector in a lattice formed by n basis vectors of d integer components such that the short vector has all components smaller than a constant c?

Name: Anonymous 2012-12-14 2:44

ugly
And ElGamal isn't?

patent-encumbered
Why are you worried about censorship if you can encrypt your shit?

GPG doesn't support it.
That's to be expected from GNU shit.

Name: massive faggot 2012-12-14 3:15

>>216
O(42)

Name: Anonymous 2012-12-14 3:21

>>217
ElGamal has a very short textual description.

Name: Anonymous 2012-12-14 7:21

>>219
Your mom said the same thing last night.

oh wait

Name: Anonymous 2012-12-14 12:35

>>219
https://en.wikipedia.org/wiki/NTRUEncrypt:
Operations are based on objects in a truncated [[polynomial ring]] <math> \ R=Z[X]/(X^N-1) </math> with convolution multiplication and all polynomials in the ring have [[integer]] [[coefficient]]s and degree at most ''N''-1:

:<math>  \textbf{a} = a_0 + a_1 X + a_2 X^2 + \cdots + a_{N-2} X^{N-2} + a_{N-1} X^{N-1} </math>

NTRU is actually a parameterised family of cryptosystems; each system is specified by three integer parameters (''N'', ''p'', ''q'') which represent the maximal degree <math> \ N-1 </math> for all polynomials in the truncated ring ''R'', a small modulus and a large modulus, respectively, where it is assumed that ''N'' is [[prime number|prime]], ''q'' is always larger than ''p'', and ''p'' and ''q'' are [[coprime]]; and four sets of polynomials <math> \ \mathcal{L}_f, \mathcal{L}_g, \mathcal{L}_m </math> and <math> \ \mathcal{L}_r </math> (a polynomial part of the private key, a polynomial for generation of the public key, the message and a blinding value, respectively), all of degree at most <math> \ N-1 </math>.

Name: Anonymous 2012-12-14 19:39

>>221
That still doesn't tell me how to make a key, encrypt, or decrypt.

Name: Anonymous 2012-12-14 20:47

>>222
It tells you 99% of what you need to do. For the other 1%, see the rest of the Wikipedia article.

Name: Anonymous 2012-12-14 20:58

why should i believe in the security of cryptosystems based on the jewish math pseudoscience?

Name: Anonymous 2012-12-14 21:10

>>224
Wash your balls, Ahmed.

Name: Anonymous 2012-12-14 21:14

>>223
0/10

Name: Anonymous 2012-12-14 21:23

>>224
Egyptians used math long before Jews even existed, let alone showed up to learn math from the Egyptians and then claim it as their own invention.

Name: Anonymous 2012-12-15 4:25

Egyptians used jews long before math even existed.

Name: Anonymous 2012-12-17 15:22

>>3
How could you possibly know it was from there? Go back there with him, now.

Name: Anonymous 2012-12-17 17:11

>>13
What's wrong with vim? I agree on Firefox and especially XML, though.

Name: Anonymous 2012-12-17 18:14

>>230
Anti-free license, nag screen, no open mode, lots of minor bugs.

Name: Anonymous 2012-12-17 18:30

>>231
Anti-free license
It's compatible with the GPL, doesn't that pass the litmus test?
nag screen
Can be turned off.
no open mode
Sure.
lots of minor bugs.
Which ones in particular are you referring to?

Name: Anonymous 2012-12-17 20:32

>>232
GPL is for faggots and /r/helping_niglets_of_uganda is that way ->

Name: Anonymous 2012-12-17 20:34

>>231
no open mode
You mean vim /etc or did I misunderstand you?

Name: Anonymous 2012-12-17 20:34

>>233
(´_ゝ`)

Name: Anonymous 2012-12-17 20:38

>>234
You don't know vi, do you?

Name: Anonymous 2012-12-17 20:50

>>232
GPL is anti-free fascist shit.
I shouldn't have to put some obscure text in some obscure file to turn off adware in a text editor.
As for which bugs, the Vim developers maintain a nice list of them in their manual.

Name: Anonymous 2012-12-17 21:07

>>237
And Stallman is a filthy Jew.

Name: Anonymous 2012-12-17 21:16

>>238
And you are a racist cretin. We done here?

Name: Anonymous 2012-12-17 21:20

>>239
Shalom, Hymie!
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