Just take the string as bytes and hash it ffs
There’s a special place in hell for those who set an upper limit in password lengths.
this post was submitted on 26 Aug 2024
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I sort of get it. You don't want to allow the entire work of Shakespeare in the text field, even if your database can handle it.
16 characters is too low. I'd say a good upper limit would be 100, maybe 255 if you're feeling generous.
The problem is that you (hopefully) hash the passwords, so they all end up with the same length.
At minimum you need to limit the request size to avoid DOS attacks and such. But obviously that would be a much larger limit than anyone would use for a password.
Also rate of the requests. A normal user isn't sending a 1 MiB password every second
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The eBay password limit is 256 characters.
They made the mistake of mentioning this when I went to change my password.
Guess how many characters my eBay password has?
Just paste it in here and I count the characters for you.
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I sort of get it. You don’t want to allow the entire work of Shakespeare in the text field, even if your database can handle it.
You don't store the original text. You store the hash of it. If you SHA512 it, anything that's ever given in the password field will always be 64Bytes.
The only "legit" reason to restrict input to 16 character is if you're using an encryption mechanism that just doesn't support more characters as an input. However, if that's the case, that's a site I wouldn't want to use to begin with if at all possible.
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Oh and also, "change this every four weeks please."
Okay then. NEW PASSWORD: pa$$word_Aug24
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Reasonable upper limits are OK. But FFS, the limit should be enough to have a passphrase with 4 or 5 words in it.
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Just opened a PayPal account and their limit is 20. Plus the only 2fa option is sms 🙃.
I just double checked and I have TOTP enabled for my PayPal account so it should be an option.
I just found this support article of theirs and it says it can only be enabled through their website and not through the app (why?!) so you might be running into that?
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English letters? Really? So basically no a-z, only Æ, Þ, Ƿ, Ð?
Ye olde passwarde
What have the Romans ever done for us?
Roads?
Well, yeah. Obviously the roads. I mean, the roads go without saying, don’t they? But apart from the sanitation, the aqueducts, and the roads…
Irrigation! I need to rewatch this, it's been too long.
All right, but apart from the sanitation, the medicine, education, wine, public order, irrigation, roads, a fresh water system, and public health, what have the Romans ever done for us?
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Also Œ, Ȝ, and arguably W and U.
Anglo-saxons got the UWU, nice
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You remind me of my bank about 17 years ago. Everyone had to have a 10-character password, exactly, and it had to include exactly 2 numbers and 1 symbol. I wasn't very knowledgeable about computers at the time and it already felt dumb.
A few years ago my ISP pushed an update to my router that changed the password requirements, invalidating my passwords. Because I couldn't enter the old password I also couldn't change the password. I had to do a factory reset.
Feels odd to check the password requirements on the enter password screen in addition to the new password screen.
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17 years ago, jeez. My credit Union's website is like that. Only its between 8-12 characters. No more, no less.
It's terrifying.
At that time my bank allowed up to 6 digits as a password. I kid you not, like a card PIN but for online banking login. I believe the whole banking security relies on their backoffices still running on paper.
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I had one of those “fancy” Vodafone routers included with my broadband which had a stupid rule set on choosing the WiFi password. It’s my network, not yours, stupid router. It can be as insecure as I want.
Anyway the rules were enforced by the JavaScript so it was easy to bypass until I got my own router to replace it with.
It's important to note, that these things are designed for the average user. If you want to change the wifi password, you are by far not an average user. Most users just plugs in and never even think about that, and the number of that kind of users are several order of magnitude higher than the conscious ones. For them it's much more secure to set a random pw. If you let them select a password they will choose 12345 or password.
If you know what you are doing usually it's better to buy your own router where you can change everything the way you like.
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Assuming we can use both lower- and uppercase letters (52 in total), with the ten digits and the underscore that gives us 63 characters to work with. A random 16-character combination of these gives us 95 bits of entropy (rounding down), which is secure enough by modern standards, at least for a home router.
Regardless, I understand the frustration of arbitrary limitations preventing you from choosing a secure password in a way that you're comfortable with.
Create a randomly generated password and store it in a password manager
I hate that kind of stuff, when I see this I wonder if they hash the password at all
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TP-Link.... TP-Link...
I don't trust your bottom barrel software, TP-Link...
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Lol. Imagine thinking TP Link takes security seriously.
16 characters was the minimum length a password should be due to how easy it was to crack… something like a decade ago.
Now it’s something like 20 to 24 characters.
Seriously, if your company is defining maximum password length and demanding specific content, it is failing at the security game. Have the storage location accept a hashed UTF-8 string of at least 4096 bytes - or nvarchar(max) if it’s a database field - and do a bitwise complexity calculation on the raw password as your only “minimum value” requirement.
Look at how KeePass calculates password complexity, and replicate that for whatever interface you are using. Ensure that it is reasonable, such as 150-200bit complexity, and let users choose whatever they want to achieve that complexity.
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