Security methods

When systems for electronic commerce are devised, or when existing solutions are selected, the following attributes must be present:
1 Authentication – are parties to the transaction who they claim to be? This is achieved through the use of digital certificates.
2 Privacy and confidentiality – are transaction data protected? The consumer may want to make an anonymous purchase. Are all non-essential traces of a transaction removed from the public network and all intermediary records eliminated?
3 Integrity – checks that the message sent is complete, i.e. that it is not corrupted.
4 Non-repudiability – ensures sender cannot deny sending a message.
5 Availability – how can threats to the continuity and performance of the system be eliminated?


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