Useful tips for everyday
When performing a name lookup using dig you received the Nxdomain response What does this mean? The NXDOMAIN is a DNS message type received by…
Does https use RSA or Diffie-Hellman? Is D-H always used in HTTPS? The answer is NO. In practice, Diffie–Hellman is not used with RSA being…
How can I give sudo full user without password? Enable sudo without password in Ubuntu/Debian Open the /etc/sudoers file (as root , of course!) by…
Does Tor use Diffie-Hellman? Something important to note here is that Tor uses the Diffie-Hellman algorithm to set up session keys between the user and…
What is SMS identity verification? SMS authentication—also known as SMS-based two-factor authentication (2FA) and SMS one-time password (OTP)—allows users to verify their identities with a…
How to decrypt and encrypt passwords using PHP? Decryption of the password: To decrypt a password hash and retrieve the original string, we use the…
How do I manage app permissions in Windows? In Windows 10, use the Privacy page to choose which apps can use a particular feature. Select…
What is name constraints? Name constraints are defined in the internet public key infrastructure (PKI) standard RFC 5280. These constraints provide a way for CA…
How do I replace my CA certificate? Renew Issuing/Subordinate CA Certificate Log onto your Issuing CA and open the Certificate Authority MMC. Right click on…
Can chip card be cloned? Cybercriminals have been creating counterfeit cards by copying the EMV details—including the iCVV—onto the magnetic stripe. The magnetic stripe clones…