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Entries Tagged ‘Certificate Authority’

How to Generate a Digital Certificate for S/MIME (Secure MIME) email Communication

For most S/MIME compatible email clients, you must obtain a PKCS12 format certificate before you can upload your private key and/or others’ public key for secure email communication. The first way you can do this is, of course, to apply such a certificate from a trusted Certificate Authority (CA), such as VeriSign. But can you [...]

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Public Key Infrastructure: Certificate Authority and Its Role in PKI: An Example

Public Key Infrastructure is also named PKI. What is the role of Certificate Authority in PKI? Before we talk on this, let’s discuss the term “trust”. The operation of Public Key Infrastructure strongly depends on “trust”.  And this is also related to the application of asymmetric cryptography technique. To illustrate this, let’s suppose Bob wants [...]

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DNS – Domain name system security issues

Domain Name System (DNS) is the magical ability of Internet hosts to translate the machine-readable IP address numbers like 216.109.112.135 to something meaningful to humans, like www.yahoo.com. A sophisticated hierarchical database system in the Internet is required to accomplish this task. One of the core components of that system is the DNS server, which serves [...]

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