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Re: [SIGNATUR] Hvad med den anden vej?



Hej,

"E. Sjørlund" wrote:
> Hvordan kan man verificere en digital signatur?
> Det kunne vel være interessant i forbindelse med diverse programmer at
> kunne få verificeret afsenderens digitale signatur, men er det til at
> have med at gøre?

Den normale procedure er at du bruger senderes 'public key'. Then kan du
finde i hans/hendes certificat. Certificatet kan du godkende ved at se
hvem der har underskrevet dette certificat. Nu finder du saa
underskriverens ceritficat og ser hvem der underskrevet det ... fortæt
indtil du finder et certificat som du ved du stoler paa.

Eksempel:

Alice skriver til Bob. Bob henter Alices certificat. Bob ser at
certificated siger god for signaturen, men Bob ved stadigvæk om
certificated virkelig kommer fra Alice. Bob ser at firmaet Alice A/S har
underskrevet certificated (der arbejder hun). Bob henter nu Alice A/S's
certificat. Det er underskrevet af TDC, som Bob allerede har i hans
liste over certificater som han stoler på, ergo kan han nu stole på at
Alice skrev brevet da signaturen er korrekt.

Martin


 
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