Collaborate Disseminate
We have generated an internal root Certificate Authority for our organization and added X509v3 Name Constraints for our domain (example.com)
We issued a number of certificates for servers under that domain.
Now, we have a s… Continue reading Can I adjust the X509v3 Name Constraints on my internal CA after I have issued certificates?
In order to send a file securely, I am going to encrypt/password protect a PDF file with Preview on macOS.
Other question(s), such as this one have asked the method of encryption for PDF’s in general, but not about Preview on macOS speci… Continue reading What encryption method is used on macOS Preview.app?
I have created an online donation form for a Public Library. The form collects names, phone numbers, emails, addresses (a lot of personal info). The form is submitted to a PHP script that saves the information to CSV file an… Continue reading How to give someone access to a file, on a website, securely without relying on a single password?
After someone has hidden their IP address so that it doesn’t appear in the header of an email, is it possible to find the sender via another method?
Continue reading Is it possible to find email sender who has hidden their IP address in the header?
The basic idea is that you have a block of plaintext (for example, 128 bits) and a key (for example, 128 bits) as inputs to the encryption algorithm. The output will be a block of cipher-text (for example, 128 bits). If the e… Continue reading Encryption Algorithm Compression
I’ve been working on building a website for my school, but with a low budget, they didn’t want to purchase an SSL license. I then turned to Google OAuth as that would at least encrypt the username and password. This works fin… Continue reading Secure Login System Without SSL Through Google OAuth
I’m trying to get started with OpenPGP encryption. I understand the concept of keeping your master key safe, and using other keys signed by that key (which can be revoked if stolen) for encryption and other daily use. But I’m confused by t… Continue reading What are the advantages to OpenPGP "subkeys"?