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Topic: Avoid reusing Litecoin Address (Read 1574 times)

hero member
Activity: 826
Merit: 1000
Founder & CEO of Coinut.com, Litecoin Core Dev
October 05, 2016, 01:59:30 AM
#26
Reusing Litecoin addresses reduces privacy. There is an effective way for avoiding that. Suppose your friend gives you an address L already used to send out transaction, and thus its pub key is known, denoted as P.

Then you can generate a new address for him to avoid using the old one following the method below. And only he knows the private key of the new address.

Suppose Litecoin's elliptic curve base point is G. Then you randomly choose a number a, and calculate aG + P, which is the pub key of the new address, and then take HASH160 of the pub key and you get the new address.

After sending Litecoins to the new address, you tell him a. And then he can calculate the new private key as x+a, where x is the private key of the original address L.

The reason is: since the original private key for P is x, i.e. P = xG, the private key for the new address is then x + a, because (x+a)G = P + aG.

Next, I am going to introduce how to use this trick to create a decentralised Litecoin Blockchain based CoinJoin service for Litecoin.

Besides the litecoin Electrum version of the wallet, is there an HD wallet made for litecoins? Your development team should start making one or at least create a code base for the others to continue and to possibly make one.

It is already known that we should not keep using the same address over and over. So why not have an HD wallet and make it more convenient for the users?

LoafWallet, Jaxx, and soon a few hardware wallets.
legendary
Activity: 3192
Merit: 1509
October 05, 2016, 01:58:12 AM
#25
Reusing Litecoin addresses reduces privacy. There is an effective way for avoiding that. Suppose your friend gives you an address L already used to send out transaction, and thus its pub key is known, denoted as P.

Then you can generate a new address for him to avoid using the old one following the method below. And only he knows the private key of the new address.

Suppose Litecoin's elliptic curve base point is G. Then you randomly choose a number a, and calculate aG + P, which is the pub key of the new address, and then take HASH160 of the pub key and you get the new address.

After sending Litecoins to the new address, you tell him a. And then he can calculate the new private key as x+a, where x is the private key of the original address L.

The reason is: since the original private key for P is x, i.e. P = xG, the private key for the new address is then x + a, because (x+a)G = P + aG.

Next, I am going to introduce how to use this trick to create a decentralised Litecoin Blockchain based CoinJoin service for Litecoin.

Besides the litecoin Electrum version of the wallet, is there an HD wallet made for litecoins? Your development team should start making one or at least create a code base for the others to continue and to possibly make one.

It is already known that we should not keep using the same address over and over. So why not have an HD wallet and make it more convenient for the users?
hero member
Activity: 826
Merit: 1000
Founder & CEO of Coinut.com, Litecoin Core Dev
October 04, 2016, 09:28:26 PM
#24
For someone who thinks fungibility is still a problem, check a new article that I just wrote: https://bitcointalksearch.org/topic/onchain-coinjoin-for-litecoin-1635845

CT and onchain CoinJoin together can give Litecoin really good privacy.
legendary
Activity: 2282
Merit: 1055
Monero Core Team
October 04, 2016, 03:15:02 PM
#23
The big argument for "anon" coins will be fungibility

however its a big stretch to say anon improves fungibility  Huh . could be easily argued anon decreases fungibility especially if anon is optional.

Anonymity is a necessary but not sufficient condition for fungibility. If anonymity is optional then as you correctly point out it can actually makes things worse for fungibility.
hero member
Activity: 770
Merit: 629
October 04, 2016, 12:33:26 AM
#22
Adding an option to be anonymous causes too many complications.
It has to be all or nothing in my opinion.
You might as well fork to another currency if you are going to give people an option like that.

I like the analogy that you can't be somewhat pregnant. You either are or you aren't.

 Grin
legendary
Activity: 2492
Merit: 1491
LEALANA Bitcoin Grim Reaper
October 03, 2016, 08:18:07 PM
#21
Adding an option to be anonymous causes too many complications.
It has to be all or nothing in my opinion.
You might as well fork to another currency if you are going to give people an option like that.

I like the analogy that you can't be somewhat pregnant. You either are or you aren't.
sr. member
Activity: 434
Merit: 250
October 03, 2016, 08:00:26 PM
#20
Adding an option to be anonymous causes too many complications.
It has to be all or nothing in my opinion.
You might as well fork to another currency if you are going to give people an option like that.
legendary
Activity: 2492
Merit: 1491
LEALANA Bitcoin Grim Reaper
October 03, 2016, 07:16:45 PM
#19
The big argument for "anon" coins will be fungibility

however its a big stretch to say anon improves fungibility  Huh . could be easily argued anon decreases fungibility especially if anon is optional.

Hence why privacy features need to be on by default for all users/addresses.
legendary
Activity: 2492
Merit: 1491
LEALANA Bitcoin Grim Reaper
October 03, 2016, 07:14:25 PM
#18
We need the optional CT.  There's no reason not to be for this.  Those who are against it need to wake up.

Think about what you are proposing...

Optional CT (even though it is only one layer of privacy) will still have the effects of a non-fungible currency. As blacklisters could just say "any LTC that uses (or has used CT in its entire history back to its coinable creation) CT we will blacklist and those LTC that don't, are fine".

The issues isn't fixed with CT.
legendary
Activity: 1876
Merit: 1000
October 03, 2016, 07:09:44 PM
#17
The big argument for "anon" coins will be fungibility

however its a big stretch to say anon improves fungibility  Huh . could be easily argued anon decreases fungibility especially if anon is optional.
legendary
Activity: 2282
Merit: 1055
Monero Core Team
October 03, 2016, 04:34:19 PM
#16
...

You need to be realistic.
i do support privacy and one day i hope to support an anonymous currency.
but..
You are being children about it.
grow up !

The way Crypto works now is that it has heavy ties to FIAT all over.
So if you want a crypto currency to go and get mass adoption you are immediately confronted with FIAT laws & regulations whether you are a stary eyed dreamer rebel or not.. it is what it is !

You are all as usual just being naive children with this whole rebel teen angst with Crypto.
Grow up and be realistic.

Do i think Snowden should be in jail for being a whistle-blower ?
Of course not.. it's a bad analogy.

I have tried ..lots.
You guys don't *WANT* to get it.. it won't benefit your FIAT bank balance.

Vanity Address ?
ya interesting point but i think the idea is to have an optional ANON implementation.. get it ?
So i am guessing it would still work with anon but not the OP's idea of using disposable addresses.

This is true, but what is being proposed on the crypto currency side is far worse by several orders of magnitude that the current reality on the fiat side. The big argument for "anon" coins will be fungibility and protecting innocent law abiding citizens from false positives generated by proprietary snake oil peddlers. Fungibility is a critical component of money and has legal precedents going back to the 18th century, if not earlier. A very good example of what I am talking about can be found in the following post. https://bitcointalksearch.org/topic/m.16445385.
legendary
Activity: 1540
Merit: 1011
FUD Philanthropist™
October 03, 2016, 04:19:20 PM
#15
I suppose those who are against privacy think Snowden should go to prison for exposing the US government for spying on its citizens. There are numerous reasons for wanting privacy besides criminal activity.

If crypto was ever adopted at the level many of you hope for private businesses would not enjoy competitors being able to gather information about their financial dealings is just one example.

Individuals in countries with corrupt governments might need privacy just like they need TOR now to be able to view internet content that might land them in prison if traced. These types of individuals might be considered criminals in their local jurisdictions; but, those of us living where we can think freely shouldn't impede their opportunity to pursue more than what is dictated.

A few minutes searching the internet can find numerous articles discussing how bitcoin is viewed as being easier to trace than cash by law enforcement.



You need to be realistic.
i do support privacy and one day i hope to support an anonymous currency.
but..
You are being children about it.
grow up !

The way Crypto works now is that it has heavy ties to FIAT all over.
So if you want a crypto currency to go and get mass adoption you are immediately confronted with FIAT laws & regulations whether you are a stary eyed dreamer rebel or not.. it is what it is !

You are all as usual just being naive children with this whole rebel teen angst with Crypto.
Grow up and be realistic.

Do i think Snowden should be in jail for being a whistle-blower ?
Of course not.. it's a bad analogy.

I have tried ..lots.
You guys don't *WANT* to get it.. it won't benefit your FIAT bank balance.

Vanity Address ?
ya interesting point but i think the idea is to have an optional ANON implementation.. get it ?
So i am guessing it would still work with anon but not the OP's idea of using disposable addresses.
sr. member
Activity: 322
Merit: 250
October 03, 2016, 03:48:06 PM
#14
This is maybe interesting, but it kills all the beauty of the vanity addresses. I'd really like to have my own address, it has a big charm I think !
sr. member
Activity: 406
Merit: 250
October 03, 2016, 03:14:15 PM
#13
What's the ETA on CT in Litecoin?
sr. member
Activity: 335
Merit: 250
October 03, 2016, 02:25:34 PM
#12
We need the optional CT.  There's no reason not to be for this.  Those who are against it need to wake up.
hero member
Activity: 770
Merit: 629
October 03, 2016, 10:28:04 AM
#11
I suppose those who are against privacy think Snowden should go to prison for exposing the US government for spying on its citizens. There are numerous reasons for wanting privacy besides criminal activity.

If crypto was ever adopted at the level many of you hope for private businesses would not enjoy competitors being able to gather information about their financial dealings is just one example.

Individuals in countries with corrupt governments might need privacy just like they need TOR now to be able to view internet content that might land them in prison if traced. These types of individuals might be considered criminals in their local jurisdictions; but, those of us living where we can think freely shouldn't impede their opportunity to pursue more than what is dictated.

A few minutes searching the internet can find numerous articles discussing how bitcoin is viewed as being easier to trace than cash by law enforcement.



Amen.
hero member
Activity: 728
Merit: 500
October 03, 2016, 09:51:46 AM
#10
I suppose those who are against privacy think Snowden should go to prison for exposing the US government for spying on its citizens. There are numerous reasons for wanting privacy besides criminal activity.

If crypto was ever adopted at the level many of you hope for private businesses would not enjoy competitors being able to gather information about their financial dealings is just one example.

Individuals in countries with corrupt governments might need privacy just like they need TOR now to be able to view internet content that might land them in prison if traced. These types of individuals might be considered criminals in their local jurisdictions; but, those of us living where we can think freely shouldn't impede their opportunity to pursue more than what is dictated.

A few minutes searching the internet can find numerous articles discussing how bitcoin is viewed as being easier to trace than cash by law enforcement.

legendary
Activity: 1540
Merit: 1011
FUD Philanthropist™
October 03, 2016, 04:41:09 AM
#9
Agreed kelsey.
I also don't care about being obsessive about privacy.
If you knew about security you'd know it makes little difference.
You can make it *harder* but that is it.. security is an illusion.

And the ANON crap push with Litecoin will be far more detrimental than it will be positive.
You guys are pushing it because it pads those bags you mentioned.

All i see is a coin that has suffered with a decline in popularity over the years.
So the solution is to pander to trends ?
Trends driven by idiot profiteers hoping to short term flip coins for profit ?
News Flash: they will betray you ..again*

Pandering does not create or attract "Supporters" it lures in the dregs of society.

Pandering is shooting yourself in the foot.
Take Microsoft for example.. they have a long history of that crap and they are hated for it.
They died at Windows 7 ..i will never use any product or service from them ever again.
because they are all garbage.. same with google etc.

ANON crap is not *needed* it's wanted by bag holders to increase popularity.
And look who's talking LOL
Guys from exchanges and BAG HOLDERS
Is it the public every day users that requested this ANON shit ? of course not.. they don't care !
YOU DO !

You last desperate dregs here hoping to make a buck of something.
So The agenda ?
Buy a ton of LTC because it's cheap and not popular with lemmings who follow what ever is rising in price..
THEN..
Hype it up with ANON shit padding your bags.

Spit on the long term supporters faces more guys  Roll Eyes

never ever pander.. it's suicide !
legendary
Activity: 1876
Merit: 1000
October 03, 2016, 04:15:10 AM
#8
No, I consider no interest of Coinut when I am working on Litecoin.

 Roll Eyes yes

The main reason is that I believe in Litecoin so I invested quite a lot personally.


well your obsession with the CT push leaves alot of us longterm supporters and purest rather concerned.
hero member
Activity: 826
Merit: 1000
Founder & CEO of Coinut.com, Litecoin Core Dev
October 03, 2016, 04:09:45 AM
#7
No, I consider no interest of Coinut when I am working on Litecoin.

 Roll Eyes yes

The main reason is that I believe in Litecoin so I invested quite a lot personally.
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