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LetsEncrypt certificate using ZeroSSL tools

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Let’s Encrypt is a free, automated, and open Certificate Authority. It uses ACME protocol to validate your domain. If you have complete control over your domain, you can get a certificate for free. In order to provide secure access to your public network like HTTPS, LDAPS etc you need a certificate from a Certificate Authority. The cost of the certificate range from 10$ to 100$. If you want a wildcard certificate then it may cost more. The certificate is valid for one year and you need to pay and renew every year. Let's Encrypt comes for the rescue. You can create and renew certificate for few.

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Holistic usage guide for OpenSSL

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OpenSSL is a general purpose cryptographty toolkit that provides an open source implementation of Transport Layer Security(TLS) and Secure Socket Layer(SSL) protocols. It is written in C,assembly and Perl language but wrappers are available in all languages. This article explains about OpenSSL commands.

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mkcert - No config certificate authority tool

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Mkcert is go-lang project, which is super easy tool to setup certificate authority without any configuration. Using certificates are inevitable these days, data should be transferred in a secure communication channel. Buying a certificate is expensive and mostly companies buy certificates only for production systems. In Dev setup, if we use self-signed certificate then there will be trust errors. mkcert automatically creates and installs a local CA in the system root store, and generates locally-trusted certificates.

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GlobalSign - Free Certificate for Open Source Projects

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GlobalSign is one of the Internet’s original trust service providers (technically known as Certificate Authorities). They have issued millions of trusted Digital Certificates to people, servers and mobile devices for Public Key Infrastructure (PKI) enabled solutions and applications. They are now giving certificates for free for open source projects.

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