DevProTalk - Da li moze neko da mi objasni zastitu

DevProTalk (http://www.devprotalk.com/index.php)

- SQL baze podataka - Sponzor: Baze-Podataka.net (http://www.devprotalk.com/forumdisplay.php?f=10)

- - Da li moze neko da mi objasni zastitu (http://www.devprotalk.com/showthread.php?t=7202)

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Originalno napisao artur_dent (Napišite 66815)

Hash zastita funkcionise lepo, tako sto postoji jednosmerna funkcija koja pravi od tvoje lozinke kriptovanu lozinku. Tako da se u bazi cuvaju samo kriptovani parnjaci. Sa akcentom na ono jednosmerna, dakle nije moguce izvuci lozinku nazad iz hash-a.

U stvari mene iznenađuje (blago rečeno) broj sajtova koji ne rade to što si opisao, tj. čuvaju lozinku u bazi. Još lepše, ako im pošalješ zahtev za reset lozinke, oni ti lepo pošalju lozinku u e-mailu :D

^ Još lepše je kada admin jednog dobro posećenog phpBB foruma ubaci još jednu kolonu u tabelu za plaintext passworde. Verovatno mu trebaju da bi špijunirao korisnike, jer se zna da mnogo njih koristi isti password za mail, forume, facebook, itd...

Slučajno naleteh na ovaj taze blog administratora sajta CodeProject.com:

http://www.codeproject.com/script/Me...06#xx2939706xx

There's always debate[^], complaints[^] and personal preferences as to whether passwords should be encrypted in a database and sent back to a user when it's requested, or whether it should be one-way hashed and 'reset link' (or similar) provided to those users who forget their password.

Over the years we've asked members what they wanted and the preference has changed from "Please send me my original password" to "Please don't send me my password". I, personally, prefer that I get my original password when I ask for it because

a) I hate having to write down or remember Yet Another Password.
b) I don't use the same password for CodeProject as I do for, say, my bank
c) I control my email box
d) Often sites that allow you to reset your password allow anyone to reset your password (meaning you get lots of links that don't work if someone hates you and abuses the system), or they ask you a 'security' question before sending the link. Frankly, everyone knows my Mother's Maiden name ("Mum" AND the name of my first pet ("Cuddles the Rabbit") so these questions, to me, are not very secure. And to be honest I just couldn't be bothered with the extra hassle.

This reasoning doesn't apply for all, and above and beyond these personal reasons of mine there is the simple fact that if you are going to look after personal information of your members you should do it properly.

So, as of today we no longer encrypt passwords, but instead we store them as a one-way hash. This means we can no longer send you your password when you ask for it.

However, I figured we needed to

a) Allow people to maintain their current password if at all possible, and
b) Protect the system from abuse

So when you request a new password, we send you a temporary password and still allow you to sign in with your old password. If you sign in with the temp password then your password becomes the temporary password, permanently. If you suddenly remember your old password and sign in with it, then the temporary password is removed.

Hopefully the best of both worlds with the added security that no one, not us, not you, not your nosy coworkers, will ever know your password.

Mislim da je ovo prekomplikovano za usera. Zadnjih par projekata sam koristio foru za koju ja licno mislim da je the best practice:

Passwordi se cuvaju kao hash. Kad se klikne na Forgoten password, moras da uneses mail kojim si se registrovao i onda se na tu adresu salje mail sa 'reset password' linkom. Tako nema mogucnosti da ti neko drugi resetuje password. Kad kliknes na link dobijes formu da uneses novi password, tako da mozes da stavis nesto sto ti se svidja, autogenerisani passwordi su smaranje.

U principu se slažem. Jedino što ne volim da klikćem na link koji mi stigne mejlom, mada ako mejl stigne kao odgovor na moju akciju to svakako pomaže :)

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Originalno napisao Dragi Tata (Napišite 66838)

Administrator sa ovakvim stavom i ovakvim principima treba odmah da dobije otkaz...

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Originalno napisao Dragi Tata (Napišite 66848)

U principu se slažem. Jedino što ne volim da klikćem na link koji mi stigne mejlom, mada ako mejl stigne kao odgovor na moju akciju to svakako pomaže :)

Iz kog razloga? sta je problematicno u tom linku i 1nom kliku?

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Originalno napisao LiquidBrain (Napišite 66853)

Administrator sa ovakvim stavom i ovakvim principima treba odmah da dobije otkaz...

molim te elaboriraj

Hvala na odgovorima. Mislima da je one-way enkripcija ono sto mi odgovara, moracu jos malo da razmislim.