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Post details: What is Digital Signature - Basic Information Security Concepts Digital Signatures
03/19/06
What is Digital Signature - Basic Information Security Concepts Digital Signatures
For those taking their CISA or CISM exams, one important concept if that of Digital Signatures. A lot of you have requested me to discuss basic information technology concepts. So today, I am discussing the concept of digital signatures. Digital signatures are used to electronically sign electornic documents. Digital signatures provide sender authentication, message integrity and non repudiation. Let us see what each one of them means.
Sender Authentication - This implies that the message has orginated from the resource who is what it claims to be.
Message Integrity - Message integrity ensures that the message has transferred completely without any changes. Message has been transfered accurately.
Non-Repudiation - With non-repudation, a person cannot later on deny the transaction in case a digital signature is used.
A digital signature thus ensures that all the above three information security criteria are met making it a safe way to transmit electronic documents.
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