Collaborate Disseminate
Could someone please explain this to me: When you use a fuzzy hash algorithm (ssdeep, tlsh, sdhash… or any other) to calculate the hash value of a file, does it calculate the hash based on the whole file (e.g. a PDF file consists of a tr… Continue reading Fuzzy hash of a file
I’m currently trying to understand how salting and no. of rounds work using mkpasswd. These are the commands that I have been experimenting around.
cp@cp-vm:~/Asg2_Task1b$ time mkpasswd -m sha-512 pAssWo@%d
$6$d7.91BJxU$zuda2MejtPegqkSiSOX… Continue reading What is the effect of salt and no. of rounds in mkpasswd encryption?
There are functions like MD5 and SHA2 in MySQL which can be used to hash values before putting them into the database, or when searching over values.
As I proposed a possible solution in a comment to this answer to a question, I was told t… Continue reading What are the threats of using hashing functions that are built into the DBMS? (besides man-in-the-middle attacks)
Hypothetically, I’d like to demonstrate that I am the owner of a piece of published information. The requirements are the following.
The hash/ characteristic string is compact enough (ideally a few bytes, say 16 or 32.)
It does not expose… Continue reading What’s the shortest message you need to claim ownership of another message?
For practice, I write let’s call it a notebook app that stores users’ notes in AES-encrypted form. For encryption, I use a password-based intermediate key technique as described here. Actually, the exact encryption method doesn’t matter he… Continue reading Using hashed trigrams to search over encrypted data
I have take a zip file from NFS port using sudo mount -t nfs 192.168.1.105/backup /tmp/kevgir .
After that, I got backup.tar.bz2.zip file in /tmp/kevgir directory. I crack the zip file using fcrackzip tool, but I also wanted to crack it us… Continue reading Problem in using zip2john tool to take hash values [migrated]
I have take a zip file from NFS port using sudo mount -t nfs 192.168.1.105/backup /tmp/kevgir .
After that, I got backup.tar.bz2.zip file in /tmp/kevgir directory. I crack the zip file using fcrackzip tool, but I also wanted to crack it us… Continue reading Problem in using zip2john tool to take hash values [migrated]
I’m currently learning about password cracking, and I have a set of passwords with their respective hash values. I used Hashcat to crack the hash values, just to see how it works, but I got different passwords. After some research, I found… Continue reading How can I identify the salt value used in a password hash?
Is it possible to generate a file with a given sha256sum checksum?
That is, reverse the process of a sha256sum checksum. That is, if we have a checksum, can we generate txt file data (need not be original) whose its checksum is equal to th… Continue reading Is it possible to generate a file with a given sha256sum checksum?
Today, on an official government website, I came across the following password rules:
"Your password has to be at least 8 characters long. It can’t have any blank spaces. It has to use characters from at least three of the following s… Continue reading Reasoning behind banning ‘#’ from the start of passwords? [duplicate]