A ministry wants to be able to prove that an approval letter was sent by a particular official, so that the official cannot later deny having sent it. Which technology provides this?
Un ministère veut pouvoir prouver qu'une lettre d'approbation a été envoyée par un responsable précis, afin que celui-ci ne puisse pas nier l'avoir envoyée plus tard. Quelle technologie le permet ?
Answers
ACompressionLa compression
BSymmetric encryption with a shared keyLe chiffrement symétrique avec une clé partagée
CA checksumUne somme de contrôle
DA digital signatureUne signature numérique
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