Collaborate Disseminate
I need to utilize the UUID datatype (128bit) for storing my hashes. The goal is to be able quickly calculate/identify different records by comparing it rather than millions of 1-10k char long strings. So the goal here is not the security (… Continue reading What is the hash method producing 128-bit output (32 hex chars) with lowest collision likelyhood? [migrated]
As everyone waits for news of a bug in OpenSSL, here’s a reminder that other cryptographic code in your life may also need patching! Continue reading SHA-3 code execution bug patched in PHP – check your version!
I have 2 websites: a.com and b.com
To avoid using SAML for Single-Sign-On and making things complicated, I’ve taken this approach:
a.com is the identity provider. All users will be asked to sign in on a.com
b.com will receive information f… Continue reading Is is safe to pass an API key in a HMAC hash?
I wanted to try new sha3sum so I installed libdigest-sha3-perl on Debian 10. After reading man page I quickly realized that:
sha3sum –algorithm 256 test.txt
produces similar output to sha256sum and that
sha3sum –algorithm 512 test.txt
pr… Continue reading What do algorithms `128000` and `256000` do in `sha3sum`?
Same question asked here in 2014 but since a lot has changed since then, I would like to get feedback from experts on the latest best practices.
The problem
We need to hash credit card numbers to use as fingerprints. We’re aiming for the… Continue reading Safest alternative for hashing credit card numbers to use the hash as fingerprint?
password_hash() is the recommended function in PHP to generate password hashes. The standard usage is password_hash($password, PASSWORD_DEFAULT); and default hash with PASSWORD_DEFAULT is bcrypt. The benefit is using the buil… Continue reading PHP password_hash (bcrypt) vs sha-3
For those unfamiliar, blockchains have two main types of data structures propagated in their networks: blocks and transactions. Each block and transaction has a hash, just like key fingerprints. The following block explorer called Blockcha… Continue reading How are these transaction fingerprints colored?
I am in a situation where I need to harden a password hash, but not allowed to bring in any extra dependencies, so I am pretty much forced to do the one thing everyone seems to advise against – roll out my own implementation…. Continue reading Password-hash proofing SHA-3
I am working on a data acquisition and preprocessing tool for a brain tumor database. The tool preprocesses the data and harmonizes it so it can be united in a one big database. Due to privacy restrictions, data protection la… Continue reading How to best hash patient names to generate a pseudonym?
I would like to know the time estimate for a brute force attack to break my input (128-bit) which means 2^128 possibilities are there. Any online tool for that or any article which talks about that?
Continue reading Using 128-bits as an input for hashing using SHAKE-3 (128-output)