What is Alphanumeric Password

More and more important data now needs to be password protected. Whether it’s the mobile device or the various networks, data and information that are used and managed on a daily basis Alphanumeric Password.

A good password is essential.

An alphanumeric password is also one of the most secure ways to protect your own data.

Provided that the user keeps in mind a few small rules when creating this password so as not to make it too easy for hackers and algorithms.


Conclusion: An alphanumeric password is by no means secure by its nature


What is an alphanumeric password?


The alphanumeric password is a password which – according to its name – consists of letters and numbers. It is therefore generally written without a special character.

Letters can be both upper and lower case.

In some cases, however, the term is also given the extended meaning with letters, numbers, and special characters in order to distinguish it from a simple numeric or alphabetic password.

How to generate an alphanumeric password?


If you need an alphanumeric password, you can generate it with a password generator. In the preselection, all you have to do is indicate that you want to do without special characters.

A password generator can help generate an alphanumeric password.

With an alphanumeric password, the general “password rules” apply, which users should absolutely internalize if they want the highest level of security possible:

The password must not contain any personal or obvious data (such as “PasswordGenerator2018”).


In addition, the name of the pet, the hometown or the celebrities are rather taboo.
The longer a password, the more secure it is.


With well-known sentences, however, the length does not help either – do without “1RingSieZuKnechten”,

“17jahrBlondesHaar” and “das1nternetistfürunsalleN3uland”. Just because he looks weird doesn’t mean he’s hard to crack.


The password shouldn’t be written on a piece of paper, much less should it be left somewhere or dragged in your wallet.


Alphanumeric password: example


“PasswordGenerator2018” is an alphanumeric password, but not particularly good. “1234abcd”, “AbCd7890” etc. are all alphanumeric passwords.

Combinations of letters and numbers that don’t make sense are the best form of an alphanumeric password. If there is a lack of creativity, a password generator can help with the creation.

When is an alphanumeric password required?

  • An alphanumeric password can also be used on the smartphone
  • An alphanumeric password can also be used on the smartphone
  • A common assumption is that a password is only really secure and provides perfect data protection if it contains many special characters – an error. One or two special characters are sufficient.

Too many special characters in the password also prevent the user from remembering it – and are forgotten more quickly.

Considering the fact that there are different passwords for all pages in the interest of increased security, this can quickly become confusing.

Password variations are easily guessed by algorithms. “Not $$ w0r1 !!” For example, it is also not particularly secure just because it is a non-alphanumeric password.


No matter if too many special characters make sense, some pages don’t (yet) recognize special characters. For most smartphones, the simple numeric code can also be converted to an alphanumeric password in the settings.

Special characters would still be safe for this, but probably rather unfriendly.

A secure password is still not easy

  • “hallo123” is an alphanumeric password and an example of a particularly negative type.
  • “Hallo123” is an alphanumeric password and an example of a particularly negative type.
  • Convenience clearly seemed to buy the benefit of safety.

1st place was “123456”, in 6th place followed by “hello” the first non-numeric password and in 10th place the attentive reader even noticed an alphanumeric representative: “hallo123”.

Countdown / Refresh:

If for any reason you forget to close your browser,
then the generated password pages will be automatically after 30 minutes
reloaded to hide passwords and overwrite browser cache.
If there is an error message, it will only be recharged after 6 hours.

Security / Confidentiality:

Obviously, I don’t save any password.
Passwords are generated and sent directly to your browser.
Of course, I also don’t log IP addresses.
Server logs are then disabled.

I only use cookies if you want to!

If you wish, you can save the special preference characters and the password length as a cookie on your computer.
So you don’t need to adjust the settings every time you visit the page.

You can also use the definition of your “self-defined password” as a cookie on yours
Save your computer so you don’t have to reconfigure the “definition” over and over again.

  • Special character / password length cookies are written in plain text as cookies.
  • Since a “definition” is part of your password, I am using a special procedure here:
  • Your definition is stored in a database and assigned to a special token.
  • You will write this token as a cookie so that you receive the correct “definition”.
  • Of course, the generated “defined password” will not be saved.

For security reasons I developed my visitor counter


because I didn’t want to use cookies or saved IP addresses for this.
I count visitors per day and in total for attendance statistics.
Visitors are only billed once per hour.


To identify the visitor, I use an encrypted checksum from the IP address.
This data is “volatile” stored in memory (RAM) as “application data” and deleted hourly.
No conclusions can be drawn about the visitor’s IP address.
In your case, I will keep the token “21C7E30A56E8BB7C84757D9E3FB980” until the next full hour.

I am happy to receive messages regarding suggestions for improvement or error messages.
You may still have tips or tricks related to generating an alphanumeric password.

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