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Re: [SIGNATUR] Hvad med den anden vej?



I indlæg:sslug@sslug skrevMartin Djernaes :/n
> 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.
>

Skal man ikke en tur ind til TDC for at få det verificeret?
Jeg kan jo udstede et falsk certifikat, hvor jeg kalder mig selv
(udstederen) for TDC, men det vil ikke kunne blive verificeret af TDC.

.




 
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