Answer:
Incomplete Question.
I'll answer this question based on general terms
Explanation:
Two Factor Authentication, abbreviated as 2FA.
It is a type of authentication that requires the presentation of two credentials for access to personal data and information.
The credentials needed for a 2FA are
1. Either of the following; PIN, Password or Pattern
2. Your device or gadget which could be an ATM Card, Mobile Phone
3. Biometrics such as fingerprint, voice input
Number one is often referred to as "Something you know"
Number two is referred to as "Something you have"
Number three is referred to as "Something you are"
The 2FA doesn't require the three aforementioned credentials. It only needs just two of the credentials to provide its authentication.
Answer:
The concealment cipher.
Explanation:
A concealment cipher also known as null cipher can be defined as an obsolete encryption format that typically involves the mixture of plaintext with non-cipher elements. This ultimately implies that, the plaintext is hidden in another message through encryption.
The concealment cipher is based on the clues of the physical factors, rather than the hardware or a software cryptosystem.
Basically, the concealment cipher is solely dependent on the clues of the physical factors that mainly affects the sender and receiver in a communication system.
They code and learn how to go in the inner and deeper parts of the computer
B. To organize information using shapes.
Cloud data storage is a model of data storage in which data is managed and backed up on a network.
