Give step by step answer to complete the task and provide screent shots: $1.$ Generate a public and private key pair using OpenSSL. Write down

the command.

$2.$ Write a shell script named batch$\_$encrypt.sh that encrypts all $.$txt files in the current directory using a given public key.

$3.$ Write a shell script named batch$\_$decrypt.sh that decrypts all

encrypted files in the current directory using a given private key

and saves them with a decrypted.txt extension.

$4.$ Write a script that creates a digital signature of a file, but also appends the current timestamp to the file before signing. This

ensures the signature is also time$-$bound.

$5.$ Modify the above script to verify the digital signature, and after verification, extract and display the timestamp to show when the file

was signed.