I am one of the authors and the current maintainer of eCryptfs, a cryptographic filesystem for Linux. It's been in the Linux kernel since about 2006. It's the cryptographic filesystem used by default on Ubuntu if you choose to "Encrypt your Home Directory", as well as by ChromeOS.
I'd like to ...
@AviD Got back late - had ISACA meeting after work, then gym, then band practice so brain not fully up to speed, but I think I agree with everything (just call me Socky) - not a huge number of questions that would suit Sec SE, but a few
@Ninefingers, happy to chat if you're still around
@Ninefingers, and no, I've never been in this chat before, though I've been around IRC for a good decade and a half :-)
@oli, yes, I am aware of AU, and I'm somewhat active there; however, eCryptfs bridges many different Linux distros, and I can see Fedora/Arch/Gentoo/SuSE/Debian users getting fussy about asking eCryptfs questions in an Ubuntu "forum"
@Ninefingers, users should and will absolutely continue posting bugs at bugs.launchpad.net/ecryptfs
There was a question posted about a week ago that my Google Alert found, related to eCryptfs on crypto.stackexchange.com, and that really got me thinking, how nice it would be to use crypto or superuser for these sorts of Q&A
So my question what exactly is the MOV attack and how does it actually work and what is it used for ?
It's explained briefly here and I'd like to know what it is more / what is it fully used for?
Thanks for any help
@DustinKirkland I'm around now :) I'm on UK time you see. Yep; I think in principle there's no problem with questions coming here, provided they come to the right site (each site has a faq and don't hesitate to wander into chat and look for their moderators who you can find on the /about page - also linked at the top - if you need to ask). Unfortunately I reckon it is inevitable we'll get one or two misdirected queries - this happens anyway - but I don't see any reason why not.
Definitely have a read of @MichaelMrozek's points above and @Oli / @StefanoPalazzo's words.
Basically, we learnt from facebook.stackoverflow.com, a facebook-specific subdomain of SO, that these things need to be handled the right way. We got a lot of facebook user support stuff that isn't really on topic on SO. But I believe that's settled down and webapps handles some bits just fine - as does that other project on SU by the looks of things.
The main idea I want to have is a backup script run rsync to copy my /home/.Private/user directory off to another server. This would allow the backup script to have no knowledge of the data, but mean the remote backups would be secure. That way I don't need to worry about what happens to them. I ...
@DustinKirkland Oli and I weren't talking about Ask Ubuntu being the official support place for ecryptfs, more about where your current batch of questions should end up. As for that, Stack Exchange encourage you to list multiple resource, and to not designate one Stack Exchange as your primary forum. It should be listed alongside IRC, the forums, and so on
The main idea I want to have is a backup script run rsync to copy my /home/.Private/user directory off to another server. This would allow the backup script to have no knowledge of the data, but mean the remote backups would be secure. That way I don't need to worry about what happens to them. I ...
Since I'm doing proper crypto these days, in production, I really ought to cough up the money and get Applied Cryptography... Which one will you be reviewing?
@DustinKirkland I think it depends. The criteria for askubuntu.com is that you're running ubuntu. unix.stackexchange will handle general unix/linux questions, and superuser might take some questions but as this is a linux file system unix.se probably makes the most sense, or askubuntu if they're running ubuntu.
However, if the end user has a question that fits this faq or ours they're welcome to post it on those sites.
@Ninefingers, will I have the ability to move a question from one site to another, if for instance, I know it's off topic in one place, and on, in another?
@DustinKirkland Not directly, but if you use the flag option and write a custom message, I can move from crypto.
We (myself, Paulo Ebermann and Thomas Pornin) can only move out from crypto, where we're mods. Everywhere else, I'm just a normal user, so I can only vote to close as off topic, or flag if I don't have the rep.
But if you are monitoring + flagging, that will help mods greatly - we get a notification icon of flags, you see, so we deal with things we see in the flag queue much faster than if we just stumble upon it.
@DustinKirkland another thing to bear in mind - whilst until you get ther rep you won't be able to edit directly, but you can always propose edits - so you really can maintain your tags to a high quality. Might be worth bearing in mind as things come in.
@DustinKirkland you'll get +2 rep for each suggested edit that gets approved, so that's fine. Best thing for him to do is be registered (so we know who he is) and wander in/talk to the other mods so we know - basically providing we can talk to you / sort out any issues, all will be fine.
@DustinKirkland You got over 200 rep on one site - if you do that, you get +100 everywhere you go. All accounts start with 1, so you default to 101.
@DustinKirkland an authority on ecryptfs then :) @StefanoPalazzo, @Oli, @MarcoCeppi, @MichaelMrozek tyhicks will also be monitoring ecryptfs when it gets going.
@Ninefingers, hopefully that helps triage questions into the right site, as the discussion here seems to be that questions of different types, even though they might be about eCryptfs, might belong on one forum or another
@DustinKirkland looks good to me, for the purposes of you sorting the questions. for a support page, it seems a bit overkill though. you can easily get rid of SuperUser, StackOverflow and maybe even crypto for that
I assume 95% of all questions you get will be well at home on AU and Unix, the rest on security.se
I'd agree. It might be overwhelming for users, I think... we (crypto, security et al) could be in an "other questions" page if you so wanted - and questions asked in the wrong place should find the right place in the end :)
I've come across this cipher and have tried unsuccesfully to decipher it.
http://codepad.org/aea7Wuyl
The only 'hint' that I have gotten so far as to how I am supposed to crack it is the word 'Cheating'.
I've observed that it is a 7x7 grid, and have tried various techniques like columnar trans...
I am one of the authors and the current maintainer of eCryptfs, a cryptographic filesystem for Linux. It's been in the Linux kernel since about 2006. It's the cryptographic filesystem used by default on Ubuntu if you choose to "Encrypt your Home Directory", as well as by ChromeOS.
I'd like to ...
Are there any general techniques for evading frequency based crypt analysis without using any encrypting techniques
So my question what exactly is the MOV attack and how does it actually work and what is it used for ?
It's explained briefly here and I'd like to know what it is more / what is it fully used for?
Thanks for any help
I've come across this cipher and have tried unsuccesfully to decipher it.
http://codepad.org/aea7Wuyl
The only 'hint' that I have gotten so far as to how I am supposed to crack it is the word 'Cheating'.
I've observed that it is a 7x7 grid, and have tried various techniques like columnar trans...
What are the advantages of using static-ephemeral ECDH over ephemeral-ephemeral ECDH?
