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Squeamish Ossifrage
Squeamish Ossifrage
01:15
It has come to my attention that random interlocutors on the internet apparently have amnesia about how egregious the Dual_EC_DRBG business was, and how well-documented it all is.
What to do?
b degnan
b degnan
01:48
@FutureSecurity Sort of like the first picture. D is the input and Q is the output. The CLK triangle is the "latch" control that takes D and puts it on Q. /Q is the inverse. Those would, indeed, be jittery if you fed the final Q into the first D.
 
4 hours later…
jww
jww
05:30
Hi Everyone. I have a quick question on Edwards and Twisted Edwards curves. An Edwards curve can be parameterized with x^2+y^2 = c(1+dx^2y^2). A Twisted Edwards curve can be parameterized with ax^2+y^2 = 1+dx^2y^2. My question is, are there any crypto systems based on a c!=1 parameter?
 
7 hours later…
b degnan
b degnan
12:58
I'm trying to make a list of the 10-ish most important papers in cryptography for one of my undergrads. I have Luby&Rackoff, Ralph Merkle's Ph.D. thesis, Diffie's paper, Shamir's how to share a secret, the RSA paper, Yao's On security of Public key protocols. Any others come to mind?
Maeher
Maeher
13:11
HILL? Goldreich Levin?
 
2 hours later…
b degnan
b degnan
15:16
@Maeher thanks! Hill as in the first substitution cipher? I just reading through Goldreich and Levin.
Maeher
Maeher
HILL as in Håstad, Impagliazzo, Levin and Luby
epubs.siam.org/doi/pdf/10.1137/S0097539793244708
b degnan
b degnan
15:30
thank you.
Maeher
Maeher
15:46
The problem that I have with recommending students seminal papers to read, is that there are quite a few old papers that have terrible exposition of the results.
So sometimes you are a lot better off, reading a newer exposition of the results.
(which is not necessarily a criticism of the original papers, the newer writeups have sometimes several decades of hindsight to work with)
 
1 hour later…
b degnan
b degnan
16:54
That is an excellent point.
 
2 hours later…
Squeamish Ossifrage
Squeamish Ossifrage
19:00
> Your IP (x.x.x.x) is blocked. Block Reason: This IP was identified as infiltrated and is being used by sci-hub as a proxy.
Well, thanks for the suggestion, SIAM! Sci-Hub works just fine to read the paper you unpublished.
2
SEJPM
SEJPM
@CurveEnthusiast chat.stackexchange.com/transcript/message/50595898#50595898
maybe you can help out here?
Squeamish Ossifrage
Squeamish Ossifrage
19:19
@jww If (x, y) is on a x^2 + y^2 = c^2 (1 + d x^2 y^2), then (u=x/c, v=y/c) is on u^2 + v^2 = 1 + d c^4 u^2 v^2, and if d is nonsquare then obviously so is d c^4.
The curves are isomorphic, so there's no need to worry about the c^2 form.
jww
jww
19:49
@Maeher - I think a good example of improvements over time (not necessarily seminal in the derived work) is Bernstein's RSA signatures and Rabin–Williams signatures:the state of the art. It sums up decades of work and I think it is surprisingly approachable. I often offer it as a reference to beginners.

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