Collaborate Disseminate
Wikipedia reports:
A 2011 attack breaks preimage resistance for […] 52 out of 64 rounds for SHA-256. Pseudo-collision attack against up to 46 rounds of SHA-256.
I am having trouble determining/understanding whether th… Continue reading How is a "SHA256 reduced by X of Y rounds" built?
Wikipedia reports:
A 2011 attack breaks preimage resistance for […] 52 out of 64 rounds for SHA-256. Pseudo-collision attack against up to 46 rounds of SHA-256.
I am having trouble determining/understanding whether th… Continue reading How is a "SHA256 reduced by X of Y rounds" built?
I’ve created an Capture The Flag challenge for me and a few of my mates, and for the final challenge, you’re goal is to log in as admin to a site. Now the site doesn’t use any server side languages (since it’s purposely inse… Continue reading How Secure Would Client Side Sha-512 Be In JavaScript
I’ve created an Capture The Flag challenge for me and a few of my mates, and for the final challenge, you’re goal is to log in as admin to a site. Now the site doesn’t use any server side languages (since it’s purposely inse… Continue reading How Secure Would Client Side Sha-512 Be In JavaScript
1) As storing passwords in plain text in databases are not secure and so is not a good practice.
password stored in db = “abcde” (plain text)
2) To avoid this, passwords are stored after being hashed using some reliable hashi… Continue reading Are Salt strings stored by application?
I am thinking if using one-way function like SHA-512 is considered to be safe for application on credit card numbers.
The credit card number is 13-19 number with known BIN range (6-8 numbers) and the last one is determined a… Continue reading Is it safe to use SHA-512 to identify credit card?
Some time ago I developed a simple script to detect duplicated files. It works in the following way:
Locates Excel files in a folder.
Obtains SHA-256 of the file.
Stores a mapping between Filename – SHA256.
Flags the file a… Continue reading Does flagging a file as read-only prevent a hash from changing?
First of all, Hello! i’m new to the site, dont knowing any english equivalent:”yoroshiku”.
So, i was reading the SHA-512crypt generator documentation(https://www.akkadia.org/drepper/SHA-crypt.txt) and found the part:
I am stuck with this question, you can see it in the picture I have included below.
PARTS (a and b) I know a-z will be 26^8, A-Z will be 26^8 guesses, and 0-9 will be 10^8 guesses. But I can’t relate guesses to time, I need … Continue reading Getting password cracking time and byte storage from bruteforce?
I’m trying to understand the use of GUID and what has always left me wondering is what’s so special about them that I should consider using them instead of rolling my own type of unique ID. In other words, why can’t I use a W… Continue reading What does GUID have, that a Whirlpool, MD5 or SHA-2 hash don’t?