[ 3 / biz / cgl / ck / diy / fa / ic / jp / lit / sci / vr / vt ] [ index / top / reports ] [ become a patron ] [ status ]
2023-11: Warosu is now out of extended maintenance.

/sci/ - Science & Math

View post   
File: 6 KB, 280x180, RSA Pic 4chan.png [View same] [iqdb] [saucenao] [google]
8592291 No.8592291 [Reply] [Original]

I had a discussion today about cryptography with a friend and he said that 128bit RSA is "better" than RSA with 256 bit. The problem is that he didn't explain that to me... So I ask you guys can somebody explain it to me?

>> No.8592315

desu it's worse and your friend is a massive brainlet

>> No.8592377

Friend he mentioned here btw.

I was referring to AES and using RSA keys with a length below 1024 is stupid anyways...

>> No.8592378

First define what you mean by "better".

>> No.8592606

more secure would be the best word to describe

>> No.8592619

Best not to be involved in anything needing secrets. If it can't be shared, it's not good.

>> No.8592627

>>8592606
Less "insecure" is accurate, reasonably speaking..

>> No.8592696

>>8592619
Why?The most things, which you should not share are good

>> No.8592715

>>8592291
clearly bullshit, both are the same security, the only difference is that 256 bit is less susceptible to collisions. Obviously. The more bits the more unique outputs to cover all the possible inputs... Also harder (bigger) to pre-compute and store in pre-computer tables...

>> No.8592722
File: 287 KB, 836x1065, 1455310679806.png [View same] [iqdb] [saucenao] [google]
8592722

>>8592291

Your friend is a cs major so you should discard everything he says. They don't know anything, even about their own field.

>> No.8592729

Are you mad? But nice pic ;D

>> No.8594084

>>8592722
AES with 256 bit keysize is more vulnerable to related key attacks than AES with lower key sizes, which reduces its computational complexity below AES-128 levels and makes bruteforcing way easier. It still isn't practical though I admit.

>> No.8594085

>>8594084
This shit doesn't work with full AES, my dude.

>> No.8594086

>>8592729
found the newfag

>> No.8594087

>>8594085
It does. Success of this depends on the way it is being implemented since a proper implementation will prevent related keys.

>> No.8594508

>>8594086
Do not blame me