Its implementation is very easy and straightforward. It uses a one-to-one of characters in a character set. The input needed is the plain-text message and the encryption number.
For example, using the character set A-Z, encrypting the text CS IS COOL using the key of 3 generates FV LV FRRO. What has been done here is to take each character in the plain-text message and move it by "encryption number steps" in the character set.
The NFC Technology is a Wireless Technology which works in the range of 10 cm or less.
NFC stands for Near Field Communications.
The name itself indicates that it a communication mode with the near by objects.
The NFC technology is used in Access Cards, Payment Cards and Mobile Devices etc.
Option (a) IM - Instant Messaging is the instant text messaging technology sends and receives messages over the internet. It is used in Social Media where instant messaging is available. So, option (a) is not correct option.
Option (b) text messaging the technology is the technology in which the text messages are sent over the mobile networks ( in case of text messaging in mobile phones ) or over the internet ( emails, blogging etc). So, option (b) is not correct option.
Option (d) DES is not a short range wireless technology. So, option (d) is not correct.
Boolean Expression: in programming, an expression that evaluates to True or False. Conditionals: Statements that only run under certain conditions. If-Statement: The common programming structure that implements "conditional statements".
