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Thread Rules 1. This is not a "do my homework for me" thread. If you have specific questions, ask, but don't post an assignment or homework problem and expect an exact solution. 2. No recruiting for your cockamamie projects (you won't replace facebook with 3 dudes you found on the internet and $20) 3. If you can't articulate why a language is bad, don't start slinging shit about it. Just remember that nothing is worse than making CSS IE6 compatible. 4. Use [code] tags to format code blocks. | ||
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Cyx.
Canada806 Posts
On October 14 2014 07:26 Spazer wrote: It's a common story. Almost happened to me too. It's just so damn easy to have too big of a scope. I wish just once I could start a project that took me as long as I thought it was going to... Maybe some day. It's a nice dream. | ||
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Nesserev
Belgium2760 Posts
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tofucake
Hyrule19268 Posts
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phar
United States1080 Posts
On October 14 2014 04:23 FFGenerations wrote: er.... guys did you know gmail just started blocking 7zip (zip) files that contain vbs files? i saved all my work by emailing myself vbs inside 7zip and now all my archived files are deleted by gmail????????? could have lost a weeks worth of work due to formatting and thinking my files were not going to be randomly fucking DELETED by my email service If you still need to find a vbs file from gmail, you may be able to recover it: https://productforums.google.com/forum/#!topic/gmail/F509J1du_eU If that doesn't work and you still need it back send me a PM. Also separately, consider starting to save your code via some form of vcs. Maybe github. | ||
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FFGenerations
7088 Posts
"Self-respecting anti-virus researchers do NOT send malware by e-mail in ZIP archives. Not even password-protected ZIP archives. Not only is the encryption used by ZIP archives insecure and easily broken - one does not even need to break it, in order to detect that the archive contains some kinds of malware. A ZIP archive (as well as most other kinds of archives) contains, among other things, the CRC-32 of each uncompressed (and unencrypted) file. If the file contains static malware (i.e., not a program infected by a parasitic virus or a self-modifying Trojan horse), its CRC will be the same, no matter what password is used to encrypt it. An external program can detect it in the archive without even having to bother with the encryption. In addition, as far as I know, McAfee's scanner automatically tries the password "infected" when scanning password-protected ZIP archives; probably other scanners can do it too. The reason for this is not anything nefarious - it is because the developers of the scanner use their own product as a tool when examining incoming virus samples and these are often contained in ZIP archives protected with the password "infected". There are simply way too many people who ignorant about cryptography and don't take sufficient precautions when sending malware by e-mail, alas. That's why professional anti-virus researchers always use PGP when sending mailware to others. It is way more secure and responsible. It also ensures that only the intended recipient can decrypt the sample - not just about anyone who knows (or can guess) the password. Sure, this method is not suitable for samples that are made publicly available (e.g., on a web or ftp site) - but responsible anti-virus researchers don't do that." http://www.ghettoforensics.com/2014/02/google-actively-scanning-malware-emails.html IDK why an encrypted file format would publicly display a hash of its contents though.............seems a bit retarded? | ||
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FFGenerations
7088 Posts
On October 14 2014 11:58 phar wrote: If you still need to find a vbs file from gmail, you may be able to recover it: https://productforums.google.com/forum/#!topic/gmail/F509J1du_eU If that doesn't work and you still need it back send me a PM. Also separately, consider starting to save your code via some form of vcs. Maybe github. Oh thanks dude. I'm sorted now thankyou. Yeah I was using email for this out of habit/convenience but will start using github now, cheers | ||
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Blisse
Canada3710 Posts
If you're using 7-Zip the default encryption scheme for the Zip format, ZipCrypto, is weaker than AES-256 (it's been cracked). 7-Zip also doesn't specify "Encrypt file names" for Zip files because it doesn't work and never worked (as I mentioned before). You're misunderstanding what's going on. If you want to hide the public name of your compressed files and still want to use Zip, put them inside a second Zip file. | ||
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FFGenerations
7088 Posts
![[image loading]](http://i.imgur.com/mVafPBT.jpg) this is ss of current 7zip fyi | ||
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Blisse
Canada3710 Posts
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Ninoah
7 Posts
![[image loading]](http://puu.sh/cfbcI/1ac2c217f4.png) Can someone explain to be the else part of the function? The way I write this function is to test obviously from 3 -> root n, increment by 2 to avoid evens. But they went even further here. I don't really get the second if condition to leave the function..."if n mod (f + 2" or why they increase f by 6 each time. | ||
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ZenithM
France15952 Posts
Essentially, what the algorithm is doing here is start from 5 = 6*1 - 1, and test each step if (6k - 1) divides n (that's "if n mod f = 0") then if (6k - 1) + 2 (which is 6k + 1) divides n (that's "if n mod (f+2) = 0"). It's a way to skip some of the non-prime potential dividers. A non-prime integer p is to be skipped, because p's own dividers have already been checked against n before in the algorithm. If p was a divider, its own dividers would have consequently been dividers of n, so you would have stopped already. Edit: Hmm, I guess you understood that already. It's like skipping even numbers, but better ;D Edit4: Wait no I was right actually. Whelp, removed it now. | ||
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Zocat
Germany2229 Posts
Rewritten: Possible candidates are 6*k-1 and 6*k+1. Let's define f as 6*k-1. Then the possible candidates are f and f+2 The +6 is just increases the value of k by 1. (So f is 5, 11, 17,...) If you want to know why all primes have the form I'd say look at this: http://mathblag.wordpress.com/2013/08/30/primes-of-the-form-6k1/ | ||
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Ninoah
7 Posts
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Blitzkrieg0
United States13132 Posts
On October 17 2014 11:52 Ninoah wrote: Thanks. I understand the 6k +/- 1 and reasoning behind f + 2 now. Just gonna go do some more follow up reading on why "All primes greater than 3 can be written in the form 6k+/-1."is true. Do you understand why you could skip by say 2s starting with an odd number greater than 1 to find primes? Going up by sixes is same principle except you're accounting for factors 2 and 3. We take our number and do mod six. If this equals zero, two, or four then the number is even and has a factor of 2. if it equals three then the number has a factor of three. The other two cases align with 6k +- 1 and may or may not be prime. 6k + 1 is mod six equal to one and 6k -1 is mod six equal to five. | ||
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Blisse
Canada3710 Posts
looks like office is trying to not obfuscate their x documents now? https://github.com/OfficeDev/Open-XML-SDK | ||
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bangsholt
Denmark138 Posts
On October 17 2014 15:17 Blisse wrote: it's black magic i tell ye @: maths looks like office is trying to not obfuscate their x documents now? https://github.com/OfficeDev/Open-XML-SDK Now? It's been an open standard since it was started (I think it was in 2006, but not sure) and it became standard in Office 2007. The fact that there's still no editor that correctly implements the spec... That's a different story ;o) | ||
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Blisse
Canada3710 Posts
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bangsholt
Denmark138 Posts
To compare, the Open Document Format spec is around 1000 pages. Both are similar in the structure, but one is made to be read and understood by humans  | ||
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FFGenerations
7088 Posts
this looks like the affordable UK website (150-165) what the fuck is up with this website design tho? who makes a website like this?? http://www.beautelle.co.uk/company/ direct link http://www.beautelle.co.uk/water/ergonomic posture saddle stools.htm maybe this one is better http://www.tronus.eu/en/saddlestool-standard.html?id=8538440 | ||
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ibutoss
Australia341 Posts
On October 14 2014 04:15 FFGenerations wrote: taken your comments on board, i am instead going to look into cloud computing. "My next idea was to have a look at Cloud Computing as I was advised that many interesting technical challenges exist here. I saw a company hosting online MMO games which conventionally have a download size of 20 gigs that puts a lot of 1st-time users off from bothering to trial them. The cloud hosting of the company allows users to instantly jump into the game without having to download, patch and install it whatsoever. This seems pretty intriguing. " i'll see what my tutor has to say about it tomorrow. the problem here is that i was supposed to give in a Product Initiation Document last friday which specifies what my project is going to be about, but obviously i have no fucking clue about Cloud Computing so can't specify much!! i just made a draft title of "An exploration of the benefits and risks of cloud computing with regards to the hosting of large-scale applications" and hope tutor isn't upset at my progress... :/ any comments on this subject? ill make a post maybe later in the week probably after doing some basic research./.. ideally i want to prototype something rather than do 100% research Sounds like Eve online using amazon web services AppStream. Pretty much just sophisticated streaming from cloud servers to your mobile/computer. http://aws.amazon.com/blogs/aws/amazon-appstream-can-improve-the-new-user-experience-for-eve-online/ | ||
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