https://blog.lisk.io/lisk-s-first-decentralized-application-arrives-bd933919004#.ji0wecvjd
https://github.com/MaxKK/guestbookDapp
the login is the dapp.
Thats is why all you need to login is a passphrase unlike a dat file.
It is automatically a paper wallet.
If you don't share the passphrase with anyone and write it down instead of saving it to your computer it can't be accessed by anyone else.
There is also an option for a second passphrase for sending any LSK from your wallet for 5 LSK.
Checkout the github link to confirm.
https://github.com/MaxKK/guestbookDapp
There are no applications, on the testnet there were, now its empty the dapp store on the weblogin .
And what do you mean by the login is the dapp?