Digital Signatures or Digital Certificates

question 60

Multiple Choice

Digital signatures or digital certificates:

• A)are used to validate the sender and time stamp of the transaction so it cannot be later claimed that the transaction was unauthorized or invalid.
• B)have been compromised by phishers and spammers.
• C)provide complete confidence that the transactions are secure.
• D)Both A and B

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Definitions:

Zircons

Minerals that are widely used in dating geological structures due to their ability to encapsulate and preserve uranium-lead isotopes over immense periods.

Fossilized

The process by which organic material is converted into a fossil, preserving the remains of organisms that lived in the past.

Multicellularity

The state of being composed of multiple cells that work together, often differentiating into various types to perform specialized functions, characterizing most complex life forms.

Dictyostelium Discoideum

A species of soil-living amoeba that is a model organism in molecular biology and genetics.