Each private key has a corresponding public key. Generally, the public key can be easily derived from the private key, but deriving the private key from the public key is computationally infeasible. We will review how encryption works with public key and private key in the following example. create RSA private key with openssl command…
Root certificate is the first link in the chain of trust, . Unlike other certificates, it is self-signed, meaning the issuer and subject are the same. It is a kind of X.509 certificate that can be used to issue other certificates. Certificate authorities (CAs) adhere to strict requirements to merit the trust of having a…
SSL encryption applies two keys named Public key and Private Key to encrypt connection. Both keys are similar in nature but their usage is different. Even these keys length may vary in terms of bits. The more the key is lengthy; it is hard to break it. The receiver uses public key to encode the…
An invalid SSL certificate can be one of the worst things for our business. With its scary warning messages showing in the browser, it can make people run away from our site like nothing else. Therefore, we should fix it at the earliest. And hopefully, we will not have any trouble fixing it now when…
We can quickly solve TLS or SSL certificate issues by checking the certificate’s expiration from the openssl command line. Today, let us see how to check certificate’s expiration date in 2 ways. The first one is to check the certificate on remote server side. The second is to check the certificate by PEM files. Check…
There are two major encoding schemes for X.509 certificates and keys: PEM (Base64 ASCII), and DER (binary). We can’t always tell what kind of file we are working with just from looking at the filename. We may need to open it in a text editor and take a look for ourselves. We will share more…
A self-signed SSL certificate is a security certificate that is not signed by a certificate authority (CA). These certificates are easy to make and do not cost money. The Self-signed SSL certificate is mainly used for non-production applications or other experiments. Generate private key and self signed SSL certificate Run the following OpenSSL command to…