The purging technique of data destruction is aimed at making data recovery infeasible using logical methods, which directly target the data at the memory level. Overwriting is a prevalent technique for purging, where data is destroyed by being overwritten with unintelligible characters like 0s and 1s. This method ensures that the original data cannot be recovered.
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12.

In the context of digital certificates, the Registration Authority (RA) is responsible for verifying the identity of entities requesting a certificate before the Certificate Authority (CA) issues it. The RA acts as a verifier for the CA, ensuring that the entity requesting the certificate is who they claim to be. This process is crucial for maintaining trust within a digital environment, as it prevents the issuance of certificates to fraudulent or unauthorized entities.

Volatile memory, also known as volatile storage, is computer memory that requires power to maintain the
stored information, unlike non-volatile memory which does not require a maintained power supply. It has been
less popularly known as temporary memory. Most forms of modern random access memory (RAM) are volatile
storage, including dynamic random access memory (DRAM) and static random access memory (SRAM). A
volatile storage device is faster in reading and writing data. Answer options B and A are incorrect. Non-volatile
memory, nonvolatile memory, NVM, or non-volatile storage, in the most basic sense, is computer memory that
can retain the stored information even when not powered. Examples of non-volatile memory include read-only
memory, flash memory, most types of magnetic computer storage devices (e.g. hard disks, floppy disks, and
magnetic tape), optical discs, and early computer storage methods such as paper tape and punched cards.