Non-repudiation is the ability to prevent a identified individual from repudiating a specific action or communication associated with that individual.

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How to achieve non-repudiation?

If I have a message that I need to send to another person, how do I achieve non repudiation ? Is digitally signing the message sufficient ?
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What is the difference between authenticity and non-repudiation?

I'm new to infosec and doing some reading. Not surprisingly one starting point was wikipedia. In this article, authenticity and non-repudiation are listed as 2 separate 'Basic concepts'. My ...
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When using symmetric key encryption, do we need to sign?

Say we're using a shared key between two parties, that has been distributed using public key encryption, is it still necessary to sign any data that's encrypted using the shared key? Or is it enough ...
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Is “non-repudiation” automatically proven, given the other three tenets of info security?

Just to say it, the four tenets are: Confidentiality - The message the recipient gets can be proven not to have been read by anyone else since it was encoded. Integrity - The message the recipient ...
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What security standards and regulations are in place for bank ATM?

Are there any international or US mandated standards and regulations that apply to communications between automatic teller machines and bank's central office? Are banks or ATM operators subjected to ...
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Does SSL/TLS provides non-repudiation service?

I understand that SSL/TLS provides confidentiality and integrity. But does it provide non-repudiation? I read in one book it does not. But I wonder why? What does it mean? If it means Alice can ...