MD5 and SHA-1 are well-known cryptographic hash functions. And HMAC is a well-known keyed hash-based message authentication code that involves a cryptographic hash function and a secret cryptographic key. Before we go to the topic of which one to use for HMAC, let's...
If we want to transfer sensitive data over the unsecured Internet, we need to encrypt it. Many of us might have heard the terms SSL and TLS. What is SSL, actually? How does it work? Let's understand that in detail. What is SSL? SSL or Secure Sockets Layer is a...
We simply cannot store a password in the database as it is because that is unsafe. Â If we do so, an attacker who somehow has gained access to the database can access all the passwords stored. So, instead, we use a cryptographic hash function to create digests of...
When we generate a public-private key pair in PGP/GPG, it gives us the option of selecting DSA and RSA to generate the public and private key pair. We are often confused about which one to select. What is the difference, actually? And what are the pros and cons of...
When a user generates a GPG key pair, he generates one public key and one private key. When the user wants to send someone an encrypted document, he encrypts the document using the recipient's public key. And when someone sends the user a document encrypted with the...
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