The weakness of password management systems is a need to save passwords in a warehouse, which may be hacked. It would be hard to hack them if they were not kept in a warehouse.

In this case, the weakness of modern password management systems will be removed. Therefore, we have the following problem: How to use and manage passwords without saving them in electronic or paper form?

Generate Dynamical Passwords

Dynamical passwords are parametric, dynamic, recoverable, generated on demand, and pseudo-random passwords not stored in electronic or paper form.

For the reason that dynamical passwords are generated on demand, there is no need to save them in a warehouse. Therefore, the use of dynamic passwords is a solution to the problem.

Another essential property of dynamical passwords is the easiness of recovery from some memorable parameters. The most common parameters are key and date (year, month, day). If, for example, you choose the name and birth date of one of your relatives, friends, or some famous persons, you will be able to recover the password with these parameters quickly.

In this article, you will learn to generate ten dynamical passwords using public dynamical password generators (DPGs).

Our approach consists of the following two steps:

• Define input parameters for the DPG.
• Get dynamical passwords via cURL’s POST requests to a public dynamical passwords generator (DPG);

Requirements

Dialog and cURL are required to be installed on your Linux computer.

A simple bash script

This section describes a simple bash script, which performs the two steps required.

Step 1. Define parameters.

key='trendoceans' #Secret Key
day=5
month=5 
year=2025

Step 2. Send a POST request with cURL to a public DPG.

url='https://dynpass.online/dpt/dpt.php'
curl -X POST -F 'key='$key -F 'day='$day -F 'month='$month -F 'year='$year $url

As a result, we get ten passwords with a length of 15 symbols each.

Create a file and store the above commands and save it with the name “db_script.sh”. In the future, whenever you want to regenerate again, execute the same script.

Make sure to give executable permission to your script before executing using the below command.

$ chmod +x db_script.sh

Adding a simple user’s interface

We can create a simple user interface for generating passwords using echo and read commands.

echo "Enter a key"
read key
echo "Enter a day"
read day
echo "Enter a month"
read month
echo "Enter an year"
read year
url='https://dynpass.online/dpt/dpt.php'
curl -X POST -F 'key='$key -F 'day='$day -F 'month='$month -F 'year='$year $url 

Type the above command in your editor and save it with “db_si.sh”. Then type the below command to provide executable permission for your script.

$ chmod +x db_si.sh

Adding the dialog’s interface

Using the dialog utility, we can create a better user interface. Users can graphically interact and generate passwords using the below code.

clear
key=$(dialog --title "Input" --inputbox "Enter a key" 8 60 2 3>&1 1>&2 2>&3 3>&-)
clear
x=$(dialog --title "Calendar" --calendar "Choose a date" 0 0 3>&1 1>&2 2>&3 3>&-)
d=$(echo $x |awk '{split($0,x,"/");print x[1]}')
m=$(echo $x |awk '{split($0,x,"/");print x[2]}')
y=$(echo $x |awk '{split($0,x,"/");print x[3]}')
clear
echo "d="$d " m="$m " y="$y " key="$key
url='https://dynpass.online/dpt/dpt.php'
curl -X POST -F 'key='$key -F 'day='$day -F 'month='$month -F 'year='$year $url

Type the above command in your editor and save it with “db_dialog.sh”. Then type the below command to provide executable permission for your script.

$ chmod +x db_dialog.sh

Final Thought

Nothing is secure in the world of technology; even this method cannot secure you from attack. Make sure not to hand your key and date to someone else.