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0
votes
4answers
79 views

Split text stream by hash value of first field in line

I am looking for a fast filter that will take a text file on standard input, hash each line up to the first tab character, and put the line into a different file depending on the hash value (modulo ...
0
votes
0answers
29 views

Finding not corrupt files using hashes with minimum hard disk use [closed]

Today I have one really interesting problem for all SuperUsers. After hard disk crash 80% files are recovered with folders. But still, some files (all different type) that software is saying is 100% ...
0
votes
1answer
49 views

How do you make multiple computers work on the same task? (hash cracking)

This is a question that's been plaguing me since I saw the following YouTube video: http://www.youtube.com/watch?v=TBXBB5sy5sA This man installed 20 video cards across 5 different rigs, all running ...
0
votes
1answer
48 views

md5pass or sha1pass on mac os

I'm looking for a hash tool on MacOS (shell), hope it works like md5pass on Ubuntu. Calculate case sensitive hash code. Calculate salted hash code. md5 is good, any other algorithm is ok. I ...
2
votes
2answers
99 views

How can zero byte files generate a hash value?

How can a zero byte text file generate a hash when hashed with sha1sum, sha256sum etc? What data are the programs hashing to generate a hash value? Ta
1
vote
2answers
1k views

Is there an Excel function to create a hash value?

I'm working with a number of data lists that are keyed by document name. The document names, while very descriptive, are quite cumbersome if I need to view them on (up to 256 bytes is a lot of real ...
1
vote
0answers
52 views

hash-based asyncronous directory comparison

I am trying to efficiently synchronize two large directories via VPN over a long distance. Unfortunately I cannot install advanced tools like git or rsync on the remote server due to company ...
1
vote
0answers
68 views

How to verify 7zip'd files integrity

For some files I have compressed, I have been looking for a MD5 add-on to 7zip (As I have the MD5's by way of an Explorer Column Handler, in xplorer2); or a CRC Explorer Column Handler (Because 7Zip ...
0
votes
0answers
35 views

If one's password were stolen from a site, should he/she really change it everywhere else? [closed]

(Disclaimer: I understand that, in either case, one should change it everywhere else. I also understand that one shouldn't be using the same password anywhere else) If a website were hacked and the ...
1
vote
3answers
103 views

Current alternative to the old CHECKSUM program

I'm looking for an application that does md5/sha hash check on specific files/folders periodically and store an index file per folder for future verification. I remember such application exist in DOS ...
-3
votes
1answer
388 views

With the Windows SAM and SYSTEM files, can I get the password of an account?

I heard of John the Ripper, Ophcrack and many other programs that are used in order to crack the hashes for Windows' 7 Password, but JTR seems a bit slow (Didn't get the password after 20 minutes) and ...
0
votes
0answers
155 views

How can I extract the Windows password hashes off of an old Hard Drive [closed]

I have an old IDE hard drive connected to my computer via an enclosure containing my old user account. I need the password from it. I know how to crack the hash once I have it in a text file, but how ...
-1
votes
3answers
196 views

What hash should be used to ensure file integrity? [closed]

It's no secret that large files offered up for download often are coupled with their MD5 or SHA-1 hash so that after you download you can verify the file's integrity. Are these still the best ...
1
vote
1answer
21 views

Is it possible to store Hashed data in a different field than userPassword in LDAP

I've been asked to store hashed data in a LDAP server. Putting hashed passwords is easy but I'm not sure if LDAP allows to store data like email hashed or even encrypted. Creating a LDIF file with a ...
0
votes
1answer
245 views

TrueCrypt hash performance — which one use the least CPU power? [closed]

I am creating a TrueCrypt container. When faced with the choice between Whirlpool, SHA-512, and RIPEMD-160, which one of these hash algorithms requires the least processing power? (If you know of ...
0
votes
3answers
518 views

sha1sum for a directory of directories

sha1sum ./path/to/directory/* | sha1sum the above was posted as a way to compute a sha1sum of a directory which contains files. This command fails if the directory includes more directories. Is ...
3
votes
3answers
767 views

OpenSSL hash function for generating AES key

What hash function does OpenSSL use to generate a key for AES-256? I can't find it anywhere in their documentation. $ touch file $ openssl aes-256-cbc -nosalt -P -in file enter aes-256-cbc ...
0
votes
5answers
3k views

Is it possible to decrypt MD5 Hashing? [closed]

I was seeing a video on how to hash passwords with MD5 Hashing. After googling on it I found out that Facebook also uses MD5 hashing scheme. Now I was curious to know if we can decrypt the password ...
0
votes
1answer
90 views

Hash Calculating Tools [duplicate]

Possible Duplicate: File checksum calculator for Windows What are some simple one-click tools to calculate hash of any file? For example: I'm looking for something simple like with Right ...
2
votes
1answer
408 views

Is the linux md5 password hashing considered secure?

On my RHEL6 linux is configured to use MD5 password hashing is the linux usage of MD5 for password hashing considered secure?
2
votes
1answer
462 views

How to check file against a hash on windows 7?

How to check downloaded file against its hash (SHA-256 Hash, SHA-1 Hash, MD5 Hash) on windows?
0
votes
4answers
367 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 ...
1
vote
3answers
1k views

md5sum of files in two folders

I'm trying to compare all the files in two folders via an md5sum in one command. Some like the following (bash) in Debian: $ cd ~/FOLDER1 $ md5sum ~/FOLDER2/* | md5sum -c - The idea is that the ...
4
votes
2answers
340 views

Tool for getting a complete directory/file listing with complete, detailed information

Once in a while, I take a complete snapshot of my drives with a command like the following. > for %i in (%drives_hd%) do @dir %i:\/s/a/o>>File_List.txt This gives detailed information ...
5
votes
1answer
1k views

enabling LM hash in Windows 7

Is there any way to enable/convert an NTLM hash for a user account on Windows 7 to a LM hash? I know it's not secure, but I am trying to test something. Is it even possible?
1
vote
3answers
900 views

How to add hash to MS Word documents?

I'd like to add a SHA, or some other kind of a hash to a Word (for Windows) document. Is there a good program / macro that would help me with that? Or some kind of a tutorial somewhere on the net? ...
0
votes
1answer
264 views

File comparison program for Windows Server 2008 R2

I'm looking for a program I once heard of, but I can't remember its name. The program could generate hashes other programs and calculate the difference between two programs in percentages. I vaguely ...
0
votes
2answers
783 views

How to download a file properly with a proper hash check? [duplicate]

Possible Duplicate: EXE file package repair I'm trying to download the Oracle VM with Enterprise Linux and database tools from here. It's an appliance that can be imported with VirtualBox ...
7
votes
2answers
494 views

MD5 and SHA1 checksum uses for downloading

I notice that when downloading a lot of open source tools (Eclipse, etc.) there are links for MD5 and SHA1 checksums, and didn't know what these were or what their purpose was. I know these are ...
2
votes
1answer
500 views

Compute salt with known plaintext and hash?

I have the string that was used in a webapp with md5 hashing to come up with a hash. I also have the hash. But the md5 of the string doesn't match the hash, so I'm guessing there's a salt involved. Is ...
5
votes
3answers
855 views

Best Way to Archive Digital Photos and Avoid Duplicate File Names

This problem pertains to archiving of digital pictures taken from multiple cameras. Answers here covered the general topic of the-mechanics-of-backups: How do you archive digital photos and ...
1
vote
2answers
2k views

Is there a way to detect encryption used on a file?

I have a small file that is encrypted and I want to see if it is a encryption method that has been broken or cracked.
1
vote
2answers
200 views

Why is an internal table of PATH directories maintained?

I was looking for what rehash command does and found this: The rehash command re-computes the internal hash table of the contents of directories listed in the path environmental variable to ...
5
votes
3answers
358 views

Why does sha1sum act differently with the same input?

I'm trying to replicate the behavior of the sha1sum executable in some java code, however, in the process I've discovered that sha1sum appears to behave differently given the same input in two ...
1
vote
1answer
595 views

QR Codes for Files on Google Code

When you download files from Google Code now (example), in addition to the text version of the SHA1 hash, it includes a QR code of it. The device that the file was downloaded to is the one that has ...
2
votes
2answers
2k views

What is the fastest MD5 sum calculator?

I tested the speed of md5sum on a few Ubuntu 8.04 servers Pentium III 700 MHz: 52 MB/s Atom 1.6 GHz, 32-bit: 119 MB/s Core 2 (Yorkfield) 2.5GHz, 32-bit: 194 MB/s Core 2 (Yorkfield) 2.5GHz, 64-bit: ...
3
votes
3answers
1k views

How to check for duplicate files?

I have an external hard drive on which I have backed up files several times. Some files were modified between backups, others were not. Some may have been renamed. Now I'm running out of space, and ...
1
vote
1answer
191 views

Where can I find hashes for Mozilla applications?

What is a reliable source for cryptographic hash values for Mozilla applications? Update 1: the value from http://releases.mozilla.org/pub/mozilla.org/thunderbird/releases/latest/MD5SUMS, ...
10
votes
1answer
157k views

How do I recover the password of a RAR file on Mac OS X?

I'm running Mac OS X 10.6.2 and have been handed a couple of old files that need to be extracted. Old backups or finances or bills I believe. They are RAR files, and password protected. Is there a way ...
11
votes
5answers
1k views

File checksum calculator for Windows [closed]

I'm looking for a light, fast hash/checksum calculator (eg. MD5, SHA1, etc.). I've been using HashCalc and it works fine enough, but I was wondering if there was something better. When downloading ...
1
vote
2answers
2k views

BASH: Hashing Multiple Files using a Script [closed]

Say I'm in a directory and I want to add a hash to each file in that directory and all sub-directories and add the hash into the filename. ie: filename.extension to filename.hashcode.extension ...
4
votes
3answers
493 views

How secure is it to use a password hash of a common English word as a WPA2 key?

I have a wireless router, and I want a difficult password that is still, in a way, easy to remember. I came up with this idea to take the MD5, SHA-1, SHA-256, or whatever hash of a common English ...
0
votes
4answers
2k views

Can you use OpenSSL to generate an md5 or sha hash on a directory of files?

I'm interested in storing an indicator of file / directory integrity between two archived copies of directories. It's around 1TB of data stored recursively on hard drives. Is there a way using ...
7
votes
3answers
1k views

md5: Why is my command-line hash different from online md5 hash results?

On Mac OSX Leopard PowerPC, if I do: echo "hello" | md5 on the command line, the result is: b1946ac92492d2347c6235b4d2611184But if I enter hello into one of the online md5 hash sites like ...
13
votes
5answers
2k views

Why is MD5 still used heavily?

MD5 seems to have well documented vulnerabilities and yet it remains widespread in its usage. Does anyone have any reasons for it remaining a viable option when other alternatives (e.g. SHA-2) seem to ...
8
votes
1answer
368 views

Which file system automatically stores hashes of files?

Which file system automatically computes and stores hashes of files and later checks them at access to detect corruption?