Answer: Option D digital signatures and certificates
Explanation:
Data storage means recording information through medium of storage. Data transmission means sending information from one system to another system. Physical security is protection against the damage while carrying the data.
Digital signatures and certificates act as the strong lock to enter into the data server to access information. These locks ensures authenticity and integrity of the user. This also provides confirmation that information is not changed and used by authenticated user. These locks ensure that the data is secured from where it was issued.
C.Physical Security
Physical security relates to making sure that your physical physical systems and networks are protected.
