The company recently agreed to an outside security audit after it was revealed that anyone could access a Hotmail account without knowing the user's password.

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The encrypted key is what is necessary, along with the user's ID and password, to obtain access to the user's account with the bank, and it reflects information about the laptop from which the user is accessing the bank's website.

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It has been just over a year since a glitch briefly let people use any password they wanted to s ign into any Dropbox user's account.

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Gmail service offers an option for users to access their email accounts using both a password, and a numerical code separately sent to the authorized user's mobile phone.

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The user must then retrieve all the codes, or keys, and enter them into fields on Facebook's password-recovery page to log back in, a Facebook spokeswoman said in an e-mail.

CNN: Mark Milian,