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401  Local / עברית (Hebrew) / Re: מה האינטרס של מיינרים להכניס טרנזקציות לל on: December 17, 2013, 09:14:54 AM
אין להם גם ממש אינטרס לא לעשות את זה. כרגע ברירת המחדל בתוכנה היא לאפשר מידה מסוימת של פעולות ללא עמלה, ואין סיבה אמיתית למיינר לעשות לזה שינויים.

בכל מקרה יש כללים שקובעים מתי הפעולה היא בעדיפות נמוכה ויש לדרוש עליה עמלה. זה מגביל את היכול לעשות ספאם.
402  Local / עברית (Hebrew) / Re: שאלה בקשר ל cryptsy.com on: December 15, 2013, 09:23:50 AM
תשמור כסף רק בארנק תחת שליטתך.
403  Local / עברית (Hebrew) / Re: ייבור של כורה מחו"ל - מישהו התנסה? on: December 10, 2013, 02:48:39 PM
שמעתי על אנשים שעשו להם בעיות במכס.
404  Bitcoin / Meetups / Re: Israel Bitcoin Meetup Group on: December 09, 2013, 09:59:05 PM
"Bitcoin - Meet the Activists" has been scheduled for December 22, 18:45, in Google's Tel Aviv offices, Electra Tower, 98 Yigal Alon, Tel Aviv. Gathering at 18:15.

This event gives a rare opportunity to meet the "who's who" of Bitcoin activity in Israel. More than 30 of Israel's leading activists in the community, industry and academia will each spend a few minutes to talk about themselves and their Bitcoin projects.

Details and registration at http://www.meetup.com/bitcoin-il/events/153644762/.

Video: http://youtu.be/DllBu6jPfkU
Slides: https://bitcoil.co.il/files/Meet%20the%20Activists.pptx
405  Local / עברית (Hebrew) / Re: איך אפשר למכור ביטקוין ולשון בשקט? on: December 09, 2013, 09:55:27 PM
אגב - Meni Rosenfeld
"
3. זה בטיפול. עם זאת כנראה שהחו"ד תתייחס רק לקנית ביטקוין ומכירתו בשער יותר גבוה, והיא תטען שבדומה למט"ח לא חל על זה מס."

מי אמר שאין מס רווחי הון ממסחר במט"ח?
רשות המיסוי.

מדובר באדם פרטי שקונה מט"ח ולאחר מכן מוכר בשער יותר גבוה, לא על סוחר מקצועי, חברה או סחר בנגזרות.
406  Local / עברית (Hebrew) / Re: חדש בפורום ובעולם במטבעות הדיגיטאליות on: December 07, 2013, 10:21:29 PM
תודה על התגובה המהירה!
אז לפי דעתך יש טעם לקנות ביטקוין היום?
אומנם הם צנחול איזור $700 לאחרונה אבל האם זה לא מעבר לשיא לדעתך?
רק אם אתה מאמין שביטקוין יצליח.

אם ביטקוין יצליח במידה שאני מאמין שהוא יכול, השער יכול בקלות להגיע ל-$100,000 אם לא יותר.
407  Local / עברית (Hebrew) / Re: חדש בפורום ובעולם במטבעות הדיגיטאליות on: December 07, 2013, 08:52:58 PM
לא פספסת שום רכבת, ביטקוין עוד בחיתוליו ואין סיבה להאמין שהחיקויים שלו יצליחו יותר.

את המטבעות הותיקים יותר אפשר לקנות ב - https://btc-e.com/.

לכל מטבע שמכבד את עצמו אמור להיות אתר בית עם תוכנת ארנק להורדה.
408  Local / עברית (Hebrew) / Re: איך אפשר למכור ביטקוין ולשון בשקט? on: December 07, 2013, 08:50:07 PM
1. בכל מקרה רצוי שתתייעץ עם רו"ח.

3. זה בטיפול. עם זאת כנראה שהחו"ד תתייחס רק לקנית ביטקוין ומכירתו בשער יותר גבוה, והיא תטען שבדומה למט"ח לא חל על זה מס.

4. לדעתי ייקח זמן עד שנקבל תשובות רשמיות.
409  Local / עברית (Hebrew) / Re: קיימת בורסה שמקבלת כסף דרך פייפל? on: December 07, 2013, 08:43:38 PM
לא מומלץ להתעסק עם פייפאל... אבל אתה יכול להסתכל כאן
http://bitcoinwithpaypal.com/
410  Local / עברית (Hebrew) / Re: Bitcoin Mining with new Mac Pro or ASICs on: December 06, 2013, 08:08:29 AM
According to some data, this machine will generate about 500 MH/s, which is 0.5 GH/s. Generating about $0.3 a day in current difficulty.

The CPU is completely irrelevant for this. The GPU is relevant, but I think you underestimate how far behind ASIC it is.

This machine is better suited for Litecoin mining. If you want to mine Bitcoin, use ASIC or nothing at all.

If you want the machine just for that you may as well throw your money in the toilet. (I mean, really, a Mac? Even if you do go GPU mining, get a proper rig, you can get the same for 25% of the price).

http://www.apple.com/mac-pro/specs/
https://en.bitcoin.it/wiki/Mining_hardware_comparison#AMD_.28ATI.29
http://en.wikipedia.org/wiki/Comparison_of_AMD_graphics_processing_units
411  Bitcoin / Development & Technical Discussion / Re: Feedback wanted re paper wallet tutorial on: December 05, 2013, 07:00:16 PM
Step 12.5: verify that you can fund/swipe one of your paper wallets using a small amount. On success discard the one you tested with.
Well, it's currently implied by step 14... But I don't know if I want to add it to the core list. The risk of this not working is low, and figuring out how to import the key is something most user will prefer to let their future selves worry about.
412  Local / עברית (Hebrew) / Re: קנייה מביטס אוף גולד on: December 05, 2013, 01:38:38 PM
ראה http://wiki.bitcoin.org.il/index.php/רשימת_חלפני_ביטקוין_בארץ.
413  Bitcoin / Development & Technical Discussion / Re: Feedback wanted re paper wallet tutorial on: December 05, 2013, 01:37:38 PM
Step 9 is impractical.

If your box is owned already, what's to stop malware from stashing the keys somewhere, waiting for you to reconnect?
Step 9 ("Make sure the private keys are not saved anywhere on the computer") means not to purposefully keep such copies. If there's a virus that stores them and reads on reconnecting there's not much to do in this setup. But if the computer is clean and later gets infected, not keeping keys protects you (otherwise it's not a paper wallet).

Good job!
Thanks.

Pretty photos of each stage wouldn't go amiss, people like those!
Lots more work but I'll keep in mind.

Secondly links to download ubuntu or whatever you're recommending to install on a USB to get this set up with so people can just click, click, click to get up and running.
Ubuntu is classified in this guide as "extra credit", people who want to do this need a guide for this in particular.

Only took a quick scan but also make sure that people write down their private key at least twice, probably three times.  letters like i and l look very similar.
Private keys are Base58-encoded, so I and l don't exist. But yes, it is recommended to keep multiple copies, and if printed, use a clear font.


- Mandatory: Live CD reboot your real hardware (no virtual machines)
- Get the address.org.html from github: https://raw.github.com/pointbiz/bitaddress.org/master/bitaddress.org.html
- Verify file checksum,
- Single address at a time per paper wallet and entropy set,
- All that is needed is an address + wif privkey (bitaddress.org gets this wrong with too much info), choose compressed addresses,
- Print and preserve the wallet like they were $10000 bills, but ones that can have backups.
What's mandatory is that people will actually do this rather than give up on the whole thing and keep their funds in an even worse-secured wallet (which they will if you burden them with all of these).

I thought I'd point out that on your site in general, the cross site requests are blocked by requestpolicy, and one of your css filenames catches default adblock rules, making it look like this:
I don't really know what this means. I'm using wordpress.com's hosted platform (paid for most features with Bitcoin) and was hoping they would take care of such things for me... If you have an idea what can be configured to solve this I'll be happy to hear.

My site with no off-site requests, I could host a blog page here for you, but would probably write my own uber-paranoid version of "paper wallet":
Not much point in having you host this, of course if you're up to writing a guide for a more secure paper wallet it would be great.
414  Local / עברית (Hebrew) / Re: מה זה bitcoin multisignature transactions? on: December 04, 2013, 11:17:28 PM
חייב בעברית?

בוא נעשה ככה - תסתכל ב - http://bitcoin.stackexchange.com/questions/3718/what-are-multi-signature-transactions/3729#3729 ואם תישארנה שאלות אשתדל לענות.

חג שמח.
415  Local / עברית (Hebrew) / Re: מחקר כלכלי על ב"ק on: December 04, 2013, 08:42:30 AM
קודם כל אם עוד לא מצאת את https://en.bitcoin.it/wiki/Research אתה מוזמן להסתכל שם, נראה לי יש שם גם קצת תוכן כלכלי.

בכל מקרה, שלח לי מייל ואני אפנה אותך לפיטר סורדה שיוכל לעשות סדר.
416  Bitcoin / Development & Technical Discussion / Re: Feedback re paper wallet tutorial on: December 01, 2013, 10:14:41 AM
it would be nice to also explain some of the reasoning, why this step is necessary.
It's necessary to be disconnected from the internet, otherwise malware on the computer could send the keys to an attacker (even if the website itself is legitimate).

I don't know if it's necessary to download a local copy. This depends on the entropy model.

so if you download bitaddress.org how do you know that the version you have saved is correct? is there a sha1sum posted somewhere?
Yes.

so what exactly is the point in "going offline" - if bitaddress or any MITM wanted to scam you, they'll serve your a faulty RNG that has lower entropy, and you take it offline.
That's a possible attack vector, but being connected opens additional attack vectors.

how do you know you have not been MITM'd? is the ssl cert fingerprint posted somewhere?
I don't know, but there are digitally signed SHA1 checksums which can be checked by those who know how (which is not my target audience. Or me, for that matter - I tried once and failed).

how do you know the printer is not storing the documents in a cache? some printers come with a built-in HDD.
some laser printers will have a residue on it's drums. it should be enough to print a second unrelated barcode.
I've addressed this in the post. Any additional information will be appreciated.
417  Bitcoin / Development & Technical Discussion / Feedback wanted re paper wallet tutorial on: December 01, 2013, 12:16:32 AM
When people ask me how to store their bitcoins I always recommend a paper wallet, but lacked a good tutorial to refer them to - so I decided to write one, and put it on my blog: http://fieryspinningsword.com/2013/12/01/how-to-create-a-reasonably-secure-bitcoin-paper-wallet/

Since I am not a security expert, I was hoping someone could go over it and tell me about any faults, before I announce this post.

I also have a specific question about bitaddress.org's entropy model. When the website is loaded, it asks for some mouse movements to generate entropy. But if I save the file locally and run it, it doesn't repeat the process, it picks up where it left. Is it safe to save locally, disconnect from internet and the click "Generate"? Or does something extra need to be done? (Edit: Downloading the source from github should fix that).
418  Bitcoin / Bitcoin Discussion / Re: casascius and other physical bitcoins is a fraudulent idea on: November 30, 2013, 04:57:18 PM
What? Why would anyone buy a Casascius coin with a premium just to destroy it? Of course the vast majority of the coins are still intact.
Really? I have seen a few of his coins and every one I've seen was already *spent* (but that's only a few of course).
This is very strange. I've never seen an opened Casascius coin. I bought ~100 coins and resold most.

Also I don't quite see how spending the BTC would *destroy* the physical coin - it is made of metal after all (and if that didn't matter then why bother with it at all?).
A Casascius physical Bitcoin is worth 1 BTC + $80. If you open it the physical Bitcoin is destroyed and instead you get 1 BTC and a piece of metal worth a few cents. No reason at all to do it except in a really rainy day.

but I don't think that "physical" bitcoins (kept *intact*) are really that worthwhile a collectible (a reason I never purchased one nor am likely to ever want to).
Maybe, maybe not. I hear that some of his rarer coins now go for ridiculous prices.
419  Local / עברית (Hebrew) / Re: הציגו את עצמכם on: November 30, 2013, 04:02:40 PM
Hi This is Oz nice to meet you,

I dont have any special skills except for Music, and well... being ME!

but i am really wanting to get into investments and mining with bitcoin!

Anyone in the Jerusalem Area?

Oz
Try talking with WiW.
420  Bitcoin / Bitcoin Discussion / Re: casascius and other physical bitcoins is a fraudulent idea on: November 30, 2013, 03:59:16 PM
Surely people who bought the coins would have transferred the BTC value to a different address by now wouldn't they?

(so the idea that he could *now* go and steal huge amounts of BTC seems a bit unrealistic to me)
What? Why would anyone buy a Casascius coin with a premium just to destroy it? Of course the vast majority of the coins are still intact.
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