組裝您的密碼與Passpack
2007年4月26日 · 由大衛布雷得里
Tara凱利從passpack.com最近評論對我們 密碼為科學家 崗位。 引起您的對一種新方法的注意到存放您的密碼。
現在，我們有通過痛苦是的所有存放，并且檢索密碼為所有那些成千上萬社會網絡位置、我們各種各樣的MySpace和YouTube認為，一切從Digg到HotDiggedy需要一個獨特的用戶名和密碼組合。
以我們的密碼為科學家崗位，我們給了您一個想法關於怎樣創造強的密碼， Kelly女士提供親切地擴展的更加隱秘建議而不是使用一個唯一化學式您增加兩三個詞，因此，例如您的passphrase也許成為C6H12O6腐爛牙或的事輕微地意思，其中只有您會知道。
不幸地，這仍然離開大開問題的怎樣監視所有這些密碼，強，他們也許和記住哪用戶名同聯繫在一起。 有許多網上，并且離線密碼經理可利用和我知道的幾乎每個人，他們密碼在的USB存儲關鍵字哪些之內保護他們可能存放他們的密碼一本總清單。
But, what if you forget your USB key when you are traveling, or cannot access a particular storage site because of a browser incompatibility in your library or cybercafe?
Passpack.com似乎有答復。 您向站點登記為自由(雖然它仅在beta，因此不依靠它100%就是)，創造用戶ID，註冊通行證和聰明地包裝鑰匙。 ID被送到站點到註冊，您的密碼修改只有的您的用戶，以便它在一個被暴露的狀態沒有被送回到Passpack。 註冊然後您的被加密的密碼公文包觸發器下載。
跑在browswer窗口的劇本(沒有信息向前被送回到passpack從這個階段)在您的瀏覽器視窗然後使用您的包裝鑰匙打開盒。 這給您和您(除非某人凝視在您的肩膀)對您的usernames和密碼，每個組合的彙集的仅通入與適當的網站URL相關。
到目前為止，很好。
被嘗試它兩三次，它是非常容易設定和使用。 When you first login you see an array of black squares which are part of a unique anti-phishing mechanism associated with a phrase you get to choose that only you can ever see and that verifies that you are on the passpack system not a spoofed site. “It combines a custom Welcome message, IP recognition and hand-eye training,” Ms Kelly says.
However, I had a seriously nagging feeling that there is something missing from passpack - namely automatic login to your various websites. So, I dropped Tara at Passpack’s head office a line to see what she had to say about this fundamental issue and she came straight back to me, to tell me that this very feature - an auto-login tool - with a Smart Button - that does not rely on plugins is just about to be signed off and released (you can watc a demo here - http://passpack.wordpress.com/2007/03/22/passpack-auto-login-no-plugin-needed/). They’re also adding inline help to the application to make it easier to use. She also told me that, “We have a few small interface improvements almost ready to roll, as well as a few updates that handle some cosmetic issues in Mac Safari.”
The Smart Button is not yet implemented (it has been security validated, but needs some cosmetic fixes), so check back here again soon and I’ll update via the comments on this post so you get to hear as soon as it goes live. As it stands, Passpack just looks like a clever password storage facility with double encryption and a neat line in anti phishing bait. Once the Smart Button is enabled, however, it will steam ahead of the pack.
If you start using Passpack and then change your mind about it, you can always take your data with you. “We support complete export of your data,” Tara told me, “as well as encrypted back up copies.” The developers obviously want users to stay with them because they like the site not simply because of inertia or being locked in.
You can sign up for passpack.com here. Before you ask, no they aren’t paying me to promote the product (10% commission for a free product is $0, after all). It just seems to be a unique approach to a perennial problem that could help you.
Add me on StumbleUpon
Join me on Facebook
Browse my Flickr Photos
Follow my Tumblr Page
Check out my Pownce Profile
Follow my Twitters
Network with me on LinkedIn
Shout me on Digg
6 responses so far ↓
Marco Barulli // Apr 26, 2007 at 6:13 pm
Hi,
you might also be interested in trying Clipperz.
Clipperz is an online password manager with some uncommon features:
- automatic (direct) login to websites
- offline version
- …
To configure automated logins you just need to launch a bookmarklet from the page containing the login form.
And you are not limited to storing passwords, but any valuable textual information.
http://beta.clipperz.com
Please feel free to compare the security level of Clipperz with Passapack’s. (AES 256 instead of 128, SHA2-256 instead of SHA-1 or MD5, a proper PRNG, …). We are also particularly proud of the authentication process based on Stanford SRP protocol. And you need just one password (not two as in Passpack).
It’s free and completely anonymous.
The source code is freely available from Clipperz site for security review and the core crypto functions has been released under a BSD license.
Thanks,
Marco
Clipperz co-founder
David Bradley // Apr 26, 2007 at 6:47 pm
Hi Marco
Thanks for alerting us to this password manager. Is it also browser and OS independent?
Marco Barulli // Apr 26, 2007 at 11:44 pm
Clipperz runs smoothly with every OS and on Firefox, IE and Opera. Safari support coming very soon.
Thanks,
Marco
Francesco (PassPack) // Apr 27, 2007 at 1:18 am
@David
Thanks for this article. It’s nicely done.
@Marco
Let me reply to your comments on security, and if I oversimplify, please understand that I’m trying to make this post intelligible for non-crypto readers as well. So bear with me.
-1-
AES 128bit is suggested by US Federal Government for Secret documents. AES 256bit takes that further, but it is utterly useless for our scope. PassPack’s AES implementation supports 192bit and 256bit keys but we prefer to use 128bit. Why? Simple. In order to actually obtain a pure 256bit derived key, the user has to write a pass phrase of more then 50 characters. Have you ever met a user that does this? It’s pure theory.
Just to make the point. I played with the password strength tester that you recently implemented. It reaches it’s maximum strength reading at 128bit (not 256). Don’t worry, it’s not an oversight on your part, it’s just reasonable: there’s no need for more. [wink]
-2-
I agree that SHA-1, if used directly, is not so secure because the Chinese have found a way to reverse it. That’s why we don’t use SHA-1 directly, rather we combine it with xxTEA to create a hash. Here’s the formula:
SHA1Hash(xxTEAencrypt(text, key)).substring(0, 32)
That’s not reversible.
-3-
Tom Wu’s SRP technology is great, and so is PRNG, and generation of entropy is exciting, but honestly - it’s overkill.
In general, it’s important to remember that PassPack (and Clipperz) need to run in the browser. And browsers speak Javascript. And Javascript is slow. Every choice needs to be carefully weighed to find the right balance between security and speed. That doesn’t mean we choose speed over security - it means we choose balance.
Here’s an example. My PassPack account contains overs 200 entries, each with a User ID, Password, link, some tags and even notes. Yet, my 3 year old laptop can encrypt my entire pack and save it in 16 seconds (4 of which are added as “downtime” by PassPack itself to avoid stressing the browser). Clipperz employees 6 seconds to encrypt a single card. That’s a substantial difference.
-4-
One quick note on PassPack’s Packing Key - it’s what enables us to implement our anti-phishing welcome message. That’s just not possible with a single user/pass combination.
Security isn’t only about what algorithms you choose.
Ciao,
Francesco Sullo
PassPack Software Architect
PassPack's April 2007 Buzz Round up « PassPack - The Blog // May 1, 2007 at 8:18 pm
[…] Pack Up Your Passwords with Passpack | Significant Figures […]
PassPack Your Passwords: Get Them Anywhere, Securely and Freely // Aug 13, 2007 at 5:45 am
[…] as the next day — since I stay up past midnight often enough this just makes it easier) I discovered a service called PassPack. The basic premise is this: Create an account, store all your passwords […]
Leave a Comment