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0
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1answer
31 views

What is the hash algorithm for owncloud passwords

I need to know the algorithm used to generate the password hashs that look like this: $2a$08$ztQUBr1vx97Rc9MiJVr05.LZWg92jGYkRFEJViHhfZjaWpB0xfgGu It looks like bcrypt to me but when I hashed my ...
1
vote
0answers
42 views

How does Googles “Auto Awesome” choose images? [closed]

I accepted to let Google peruse my images and auto awesome them earlier today. Just now I got a notification that one of my images had been awesomified. What I find strange is that it was one of the ...
1
vote
1answer
30 views

Wireless Client Algorithm Used to Choose SSID/AP

Does anybody happen to know if it is possible to find (or determine) the actual algorithm that wireless clients use to choose which the BSSID to connect to when there are multiple SSIDs available at ...
0
votes
0answers
23 views

What is the data structure used by Recycle bin & hows it implemented [duplicate]

In a Windows file system, we cannot created a folder or file with the same name. For example, New Folder. If there is a existing folder already named as "New Folder" and if we create another folder ...
2
votes
0answers
36 views

Back of the envelope calculation for speed of matrix multiplications [closed]

I'm trying to develop an intuition for how feasible/scalable machine learning algorithms are. The dominant cost is always matrix multiplications, but there seem to be no readily Google-able resource ...
0
votes
1answer
135 views

Algorithm/Code for detecting colours in a picture [closed]

Is it possible to have code that can automatically detect the colours in a picture? If so what is this technology? Thanks,
1
vote
0answers
96 views

Understanding how Native Instruments Traktor analyzes and beat-grids songs

Quick Summary: How does NI Traktor determine: BPM (beats per minute) beat-grid key of song auto-gain Detailed Description: I am very interested in understanding exactly how Traktor analyzes a ...
2
votes
2answers
67 views

When we save a file in windows - is actual location of file on hard disk random or deterministic?

I want to know when we try to save a file to harddisk how the os saves the file to hard disk. Will two computers with same configuration and ALSO SAME INTERNAL STATE save the file on the same location ...
1
vote
0answers
55 views

How does a Benes network work?

How does a Benes network work? If I have a Benes network with 8 nodes on each side, like this one here: . . . how do I know whether or not I take the upper or lower port of a switch in each stage? ...
1
vote
0answers
176 views

How to unpack a compressed executable without knowing the compression algorithm

I'm not sure if this question was asked. I searched for it and could not find it. How can I unpack a compressed executable without knowing what compression algorithm was used to compress it? For ...
2
votes
1answer
348 views

A software to draw an algorithm

I'm currently working on a complex algorithm, and I want to draw it into a reference document. Basically, I have formulas, formulas are linked to their operands, operands are formulas themselves ...
0
votes
1answer
605 views

How to transfer data between two networks efficiently

I would like to transfer files between two places over the internet. Right now I have a VPN and I am able to browse, download and transfer files. So my question is not really how to transfer the ...
3
votes
3answers
10k views

Scheduling algorithm used in Windows 7

What is the scheduling algorithm used in Windows 7?
3
votes
1answer
317 views

What algorithms are used in signature and heuristic virus detection? [closed]

I'm trying to write a paper on virus detection techniques. I've downloaded many journals, papers and used many websites. I have found overview definition for both of these terms but I would like to go ...
0
votes
4answers
739 views

Is there a hashing algorithm that allows me to specify output character length?

My security officer is looking for a hashing algorithm that will take a string of up to 20 characters, and then output a unique, 12-character alphanumeric hash. The 20-character string is generally ...
0
votes
1answer
45 views

Verifying if two mirrored copies of disc are same or not?

I have two sets of discs which are mirrored copies of each other. Does an algorithm exist which could verify if the copy made is same as the original?
2
votes
1answer
646 views

Deleting music file duplicates but retaining iTunes metadata

Back when I first imported the majority of my iTunes library I had the copy files to iTunes Media folder when adding to library option checked, so basically my whole music library was duplicated on ...
4
votes
3answers
2k views

What's the fastest way to combine two or more files in Linux?

I want to combine two or more files in Linux, so I am using the following command: cat small_file LARGE_File LARGER_FILE > SUM_OF_FILES However this runs very slow. Does anyone know a Linux ...
3
votes
1answer
494 views

How synchronize two disks (or folders) using symbolic (or hard) links (like rsync)?

I'm searching a tool or a shell script or another program to synchronize two or more folders or disks. But it differs of rsync tool, because, I don't want to duplicate the missing file, but do a ...
1
vote
4answers
370 views

Encryption algorithm of gnome-keyring

What encryption algorithm does gnome-keyring use? I've tried looking for it on their site but it seems quite hidden.
3
votes
0answers
103 views

What Algorithm does Vmware use for their snapshots? [closed]

Does Vmware Vsphere4.1 use the Chandy-Lamport Algorithm to store their snapshots?
1
vote
2answers
105 views

Algorithm Of Getting Information From Ip Adress [closed]

i want to know how some sites and some softwares give information from a given ip address?? i mean does it have a specific algorithm?
0
votes
1answer
41 views

A tool (library, source-code, algo) to select area in an image based on perceived focus plane

Say we have an image in which a human eye can distinctly see several "planes" of focus - a blurry background ("telelens"), the sharp(er) subject (a human, or an object), and again a blurry foreground ...
3
votes
2answers
996 views

How does SSD garbage collection work?

Correct me if I'm wrong but doesn't the block bitmap (which keeps track of free blocks on a disk drive) vary for different file systems (both location and structure wise)? So how can OCZ have a ...
4
votes
2answers
1k views

unix sort algorithm implementation

What sorting algorithm(s) is/are used in the unix sort command? Insertion/quicksort/etc.?
3
votes
3answers
398 views

When erasing freespace, why do utilities write random strings of data?

I've been reading about various utilities that erase the free space on your hard drive, and they all talk about doing multiple passes of writing random strings of 1's and 0's using various ...
11
votes
3answers
1k views

How do defragmenting programs work?

a) What algorithm would a typical defragmenting program use to get rid of the fragmentation? b) In Defraggler, I have a quick defrag option and a defrag option. Assuming defrag would do a normal ...
4
votes
3answers
2k views

Decrypt files encrypted with TrueCrypt

I have a usb pen memory crypted with TrueCrypt. Is there a way to decrypt ( without TrueCrypt ) files encrypted with TrueCrypt in linux ?
20
votes
5answers
38k views

What is the maximum compression ratio of gzip?

What is the largest size a gzip (say 10kb for the sake of an example) can be decompressed to?
18
votes
4answers
9k views

How are PID's generated?

On *nix, PIDs are unique identifiers for running processes. How are PID's generated? Is it just an integer which gets incremented or a more complex structure such as a list? How do they get recycled? ...
1
vote
4answers
2k views

week numbers in month. How to work it out?

ok, I am being stupid! I am doing a project plan and for each month I have the weeks 1-4. My question is, how to know which week number a particular date belongs to? I've played with outlook but it ...
7
votes
6answers
1k views

Utility to optimally distribute files onto multiple DVDs?

I have a bunch of media files which I want to record to DVD, but since each DVD only fits 4.5GB, I have to find the optimal way to organize the files to use the minimum number of DVDs (otherwise the ...
0
votes
4answers
843 views

Given enough detail about a PC is it possible to calculate an accurate benchmark?

If I know enough about a specific computer build is it practically possible to generate a benchmark based on the specification of the components? For example, I'll know the GPU & CPU speeds, ...