Certificates are（ ）documents attesting to the（ ）of a public key to an individual or other entity.They allow verification of the claim that a given public key does in fact belong to a given individual.Certificates help prevent someone from using a phony key to（请作答此空）someone else.In their simplest form,Certificates contain a public key and a name.As commonly used,a Certificate also contains an（ ）date,the name of the CA that issued the Certificate,a serial number,and perhaps other information.Most importantly,it contains the digital（ ）of the certificate issuer.The most widely accepted format for certificates is X.509,thus,Certificates can be read or written by any application complying with X.509.

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Certificates are（ ）documents attesting to the（请作答此空）of a public key to an individual or other entity.They allow verification of the claim that a given public key does in fact belong to a given individual.Certificates help prevent someone from using a phony key to（ ）someone else.In their simplest form,Certificates contain a public key and a name.As commonly used,a Certificate also contains an（ ）date,the name of the CA that issued the Certificate,a serial number,and perhaps other information.Most

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Once SMS is verified and it is working and effectively implemented, the ship is issued with ___ .A. the safety management certificate. B. the document of complianceC. the conformity certificates D. the security certificates

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Seafarer medical certificates will be valid for a maximum of ___ .A. 1 year B. 2 years C. 3 years D. 5 years

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We are happy__we are not very rich.

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