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I am interested in a password manager that synchronizes between iOS/Android/WP7 and Windows 7. And does not require me to synchronize through or store my passwords on an online service.

Does such a thing exist?

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I really don't think, that such a thing exists. – Feroc Jan 16 '12 at 10:15
iOS and Android and WP7 and Windows 7? KeePass in its various forms might work... – grawity Jan 16 '12 at 10:25
What sort of connection between the phone(s) and the PC are you comfortable with? KeePass can use an action to upload the file to your own server. – daxlerod Jan 16 '12 at 20:54
Curious why a cloud solution wouldn't work. . . – surfasb Jan 16 '12 at 23:44
Cloud solutions work functionally speaking but I see no technical reasons why there should not be such a solutions. I suspect it has simply to do with the fact that cloud, aka, software as a service, or better said, a subscription service, offers software vendors a more attractive business model. I am sympathetic to that but was curious what if anything was out there that did not require syncing through a cloud service. – tnktnk Jan 17 '12 at 0:10

I think the best way to solve this is by using the power of "hashing-algorithms".

The idea would be to generate a unique password of each webpage using only a secret pass phrase, and the name of the webpage and username, instead of storing a list of passwords. This way you never have to sync or store anything on the "web", but will still have a unique password for each webpage.

password = hash(pass + webpage + username)

Given the same values for pass, webpage and username (and the same hash-function), you will always generate the same unique password. The only thing you need to rember is your master pass phrase.

As username and webpages are "unclassified" information, you can write this down on any page.

I have seen a java-script implementation of this idea, however i don't remember the name or webpage.

This could be related to

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Something similar to what you describe is Oplop. It's easy to implement anywhere. – slackwear Nov 7 '12 at 15:43
This is great, except when a site has password requirements that prevent your password from working. Then you're back to square one needing a way to record a password that's unique and difficult to remember. – Twisty Sep 18 '14 at 1:51

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