Topic: NEM (XEM) Official Thread - 100% New Code - Easy To Use APIs - page 1443. (Read 2985369 times)
January 08, 2015, 05:07:30 AM
NCC working, NIS not available?
January 08, 2015, 04:43:21 AM
@Eadeqa: it is a port from libsodium ref 10 implementation: https://github.com/jedisct1/libsodium/tree/master/src/libsodium/crypto_sign/ed25519/ref10
January 08, 2015, 04:14:18 AM
The basic rule is that you don't implement your own crypto and use well tested implementation.
Do not mix implementing OWN crypto, with porting implementation.
January 08, 2015, 04:10:51 AM
(so that NXT will be able to borrow ed25519 if they'll want to)
Pretty unlikely Nxt would switch to anything else, at this point. It's probably impossible now.
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We went through curve25519 paper, and ed25519 paper (and bloodyrookie went through some more papers). It's math. We're NOT BAD at math.
The basic rule is that you don't implement your own crypto and use well tested implementation.
January 08, 2015, 04:08:13 AM
"There are no guarantees that this is secure for use. Tests against the data from the Python implementation are passing, but this has not yet been audited by a professional cryptographer."
You do realize, this is text from FORKed implementation...
January 08, 2015, 04:04:00 AM
For those of you who are asking themselves what the starting point for the ed25519 implementation was:
http://lmgtfy.com/?q=Bloody+Rookie+ed25519
http://lmgtfy.com/?q=Bloody+Rookie+ed25519
I saw that before but wasn't clear this version is being used in nem. You yourself wrote:
https://github.com/BloodyRookie/ed25519-java
"There are no guarantees that this is secure for use. Tests against the data from the Python implementation are passing, but this has not yet been audited by a professional cryptographer."
January 08, 2015, 04:02:59 AM
For those of you who are asking themselves what the starting point for the ed25519 implementation was:
http://lmgtfy.com/?q=Bloody+Rookie+ed25519
http://lmgtfy.com/?q=Bloody+Rookie+ed25519
What you'll find there is only part of our changes, it'll all be visible, once nem.core will become public
(so that NXT will be able to borrow ed25519 if they'll want to)
There is no cryptographer among the 5. They are all programmers.
We went thorugh curve25519 paper, and ed25519 paper (and bloodyrookie went through some more papers). It's math. We're NOT BAD at math.
January 08, 2015, 03:58:30 AM
For those of you who are asking themselves what the starting point for the ed25519 implementation was:
http://lmgtfy.com/?q=Bloody+Rookie+ed25519
http://lmgtfy.com/?q=Bloody+Rookie+ed25519
January 08, 2015, 02:27:30 AM
Any Greek NEMsters?
January 08, 2015, 02:07:27 AM
NEM has 5 very well educated and very experienced core devs. There might very well be a guru or two on the team.
There is no cryptographer among the 5. They are all programmers.
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@Eadeqa, please take a moment to decompile it and take a look
I pretty sure they implemented (probably just copied C++ version) of ed25519 correctly, but still are they 100% sure?
January 08, 2015, 01:43:57 AM
NEM has 5 very well educated and very experienced core devs. There might very well be a guru or two on the team. Apparently building a new code from scratch and doing it well is quite a challenge.
As pretty much everyone knows, I don't know hardly anything from the technical perspective, but I talked to a programmer who independently decompiled the code and was very impressed.
Ethereum had a massive pre-sale and so it is open source pre-launch, but pretty much only the coins with massive pre-sales are open-source pre-launch.
That said, it is not completely locked away either. It is possible to decompile it and have a good look. @Eadeqa, please take a moment to decompile it and take a look. I hope you can look at it and come back and say good things!
As pretty much everyone knows, I don't know hardly anything from the technical perspective, but I talked to a programmer who independently decompiled the code and was very impressed.
Ethereum had a massive pre-sale and so it is open source pre-launch, but pretty much only the coins with massive pre-sales are open-source pre-launch.
That said, it is not completely locked away either. It is possible to decompile it and have a good look. @Eadeqa, please take a moment to decompile it and take a look. I hope you can look at it and come back and say good things!
January 08, 2015, 01:08:29 AM
elliptic curve: "Switched elliptic curve from secp256k1 to ed25519: Ed25519 is a state of the art elliptic curve. Verification of signatures is about 6 times faster for ed25519. This will speed up the synchronization process."
Last time I looked it up, there were no good (reviewed) / fast implementations of Ed25519 in Java. What library are using for Ed25519 ?
That is correct. Unfortunately there were no good java implementations of this curve so we had to do it ourselves.
How do you know you implemented it correctly? Should it not be reviewed by some crypto guru who understands ECC?
January 08, 2015, 01:06:04 AM
The NEM devs aren't messing around 
it's real time
January 08, 2015, 12:49:04 AM
elliptic curve: "Switched elliptic curve from secp256k1 to ed25519: Ed25519 is a state of the art elliptic curve. Verification of signatures is about 6 times faster for ed25519. This will speed up the synchronization process."
Last time I looked it up, there were no good (reviewed) / fast implementations of Ed25519 in Java. What library are using for Ed25519 ?
That is correct. Unfortunately there were no good java implementations of this curve so we had to do it ourselves.
January 08, 2015, 12:05:12 AM
The NEM devs aren't messing around
January 07, 2015, 10:09:01 PM
elliptic curve: "Switched elliptic curve from secp256k1 to ed25519: Ed25519 is a state of the art elliptic curve. Verification of signatures is about 6 times faster for ed25519. This will speed up the synchronization process."
Last time I looked it up, there were no good (reviewed) / fast implementations of Ed25519 in Java. What library are using for Ed25519 ?
January 07, 2015, 09:10:47 PM
January 07, 2015, 08:19:43 PM
thanks, Lon. Missed you in HK conf. Will you be in upcoming Singapore/Shanghai/HK confs?
January 07, 2015, 08:17:58 PM
quoting simply because this is ridiculous behaviour(especially coming from someone highly involved in nxt marketing iirc) and i want to set it in stone.
Cross posting this from Nxt forum, because I feel there is some miscommunication here
https://nxtforum.org/general-discussion/this-is-who-you-picked-to-do-marketing-for-nxt/msg147255/#msg147255
I think salsa posted this so we can work on this: https://nxtforum.org/general-discussion/help-design-a-comparative-matrix-for-presentation-and-nxt-wiki/msg147223/#new
As I read it, it's just a question of filling it in so we have accurate info on that matrix, nothing more.
The post comes in the middle of some less fun discussion on your thread which indeed is about just a poll.
Polls on BCT are fun, but their information value is next to useless, I agree with that.
Anyway, as the person who asked to make this matrix, I apologise if you guys feel slighted by it.
That is certainly nót the intention and I hope you know me well enough to know this.
As I read it, it's just a question of filling it in so we have accurate info on that matrix, nothing more.
The post comes in the middle of some less fun discussion on your thread which indeed is about just a poll.
Polls on BCT are fun, but their information value is next to useless, I agree with that.
Anyway, as the person who asked to make this matrix, I apologise if you guys feel slighted by it.
That is certainly nót the intention and I hope you know me well enough to know this.
yes my mistake
already solved on nxtforum deepest apologies to salsacz. purely bad timing following edeaqa's posts.ps. could we remove all the lists except one? :L its guna make the page awfully long
This is called "priming." It's interesting that introducing bias can have a large impact on subsequent perception.
January 07, 2015, 08:13:31 PM
I tried my best to answer this, though it seems that some of the categories are arbitrary. Maybe someone else can comment if they disagree with me.
Yes, please add things or put question marks where needed
Thanks for filling it out!
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