The reason this is nice to have is this quote from the site:
"How is DigiLocker going to help me?
It will minimize the use of physical documents and will provide authenticity of the e-documents It will provide secure access to Govt. issued documents. It will also reduce administrative overhead of Govt. departments and agencies and make it easy for the residents to receive services."
Edit: I'm unable to login though. I get the OTP from Aadhaar just fine, but the website doesn't seem to be able to verify it.
Edit 2: It worked after a couple of tries. Looking at the trail, it is probably some issue with Aadhaar and not this website. It does look really neat. You basically upload copies of your IDs and then agencies can request it. You get to approve. They are pulling UID data so it's quick to set up. I think the point of this is that you can link all other IDs with UID so people just have to ask for you Aadhaar number, no paper ID copies or forms. I wish they just integrated this into UID system like they link bank accounts, that way developers would have a single UIDAI API for identity, bank accounts and other IDs.
They are using a relatively new sub-CA of e-Mudhra, so it will appear everywhere soon, I believe.
If you're really willing to use it now, SHA1 of verified certificate is 56 7F 2D B5 7E 31 BC E5 6C 5C 8C 3B 80 44 AA 2F 7C 13 D3 6D. Not ideal way at all, but might help paranoia. You shouldn't trust me though.
Speaking as an Indian, I am not sure i would trust a CA run by a company that is close to the Indian govt. (whose record on corruption and civil liberties isn't exactly stellar).
See the following question in the FAQ (I've edited it for brevity with ellipsis and emphasized important parts). 
>Q11 How can I share the e-documents in my digital locker?
>A11 For sharing your e-document...enter the email address of the recipient in the dialog box and click ‘Share’ button.
>The document will be shared with the recipient via email. ...email body will have the URI link of the document and the sender name and Aadhaar number. The recipient can access the document using the URI link provided in the email.
1. You share your document, which is sent over plain text email.
2. The recipient can access it just with a link. There is no authentication or verification of any kind.
3. The recipient can forward the mail to data collectors so they can immediately get your name, your Aadhaar number and the document. There is no link expiry, which allows perpetual abuse of information by forwarding emails. This technology makes selling information a lot simpler and quicker.
4. Someone else's email account gets hacked? Thousands or millions of names, Aadhaar numbers and documents could be out on torrents soon enough. Talk about government enabling things through technology.
Even if you trust the government to store all your documents, even though some may be issued by local authorities, this looks more and more like a comprehensive and centralized data collection mechanism. The next step, which may or may not be disclosed, would be to provide access to every government entity to query this database without any control or limits or oversight. For a country without any privacy laws, they already have your biometric information, now they can completely own you. :)
The whole UID infrastructure is two-factor auth by default. Think of the URI like Facebook Graph API URLs. They are static, REST-ful endpoints that require two-factor authentication.
While there are no strong laws to protect scans of your IDs, the biometric data does come under The Privacy Bill, 2013. So does any identification typically used by financial institution. Your other IDs, like Voter ID are public information anyway, except for biometric identifiers.
It's unlike US where your SSN is electronically linked to your identity & credit history and most of the above stuff can be done without any physical documents.
The Aadhar (literally means foundation) card is trying to provide a unified identification across the country. Perhaps like an SSN to some extent.
For people who have negative opinions about this, hold on. There's more to the DigitalLocker than you think. I tried using this the day it launched (a few weeks ago). Here are a few things for people who haven't tried it.
1.) Apart from storing documents, the other important feature is to share documents with entities (seems like both govt and private). Right now in India, for anything new you want to signup for in the offline world, you are usually asked for multiple ID and address proofs. This site has a feature to share stored documents when entities request for it. So you get document requests from entities (just like Facebook friend requests) and you approve them to share the documents required. Way better than having to carry xerox copies to the office of the entity.
2.) It also looks like entities can issue you documents. If implemented, then we wouldn't have to about carrying and safe-guarding physical copies of documents. I have about 20-30 physical documents I need to safe-guard and more than a dozen marks cards from college. Imagine just receiving a notification that the document for your new insurance policy has been received in your digital locker? Ah such minimalistic life.
3.) Love the simple Aadhaar-based login process. That is so layman-friendly. Entered my Aadhaar card number to get an OTP to login. Most Indian govt sites have ridiculous rules about setting passwords - all of which I cannot remember at all. Even worse changing your account email or password on those sites is a nightmare. To change the email address on the Service Tax website, I have to write a paper-based request to the authority.
4.) You can store any document you want to. This isn't limited to government issued IDs. There's an "other" category when uploading.
5.) I've been using Dropbox to store scanned copies of my family's important documents. It has come handy many times. It is the govt offering to digitally store govt-issued documents. Why would I bother about privacy? I'm glad they made this.
6.) About the SSL cert: AFAIK they seem to have broken the site during a recent update. SSL was fine during the launch day. Oh, and when the Indian govt website specifies "beta" version - they literally mean it. And this site isn't as bad as booking a Railway tatkal ticket on IRCTC, for which there are tutorials and videos on how to use the site. I've forgotten my IRCTC username/password again and I've exhausted all mobile numbers in the house to signup for new account. I'll have to get a new sim just to book a railway ticket next time.
Mailed the DigitalLocker team my concerns about the 10mb limit and also offered to send code contributions if it was opensource. I got back a very quick reply:
It is not a open source project, but you can contribute by your valuable suggestions as it is still running in beta Version.
Regarding Storage space we have noted the issue. Inconvenience regretted.
We shall review and resolve the same as soon as possible.
[EDIT: I've edited my comment multiple times to add more information]
Cannot edit my comment anymore.
You have asked Firefox to connect securely to digilocker.gov.in, but we can't confirm that your connection is secure.
Do you have anything resembling a proof for the utter BS you just wrote?
You've asserted many things. But with no links to any proof.
Every question you asked above, also applies to the US.
I'm not going to bother providing links until you do.
> Haha. Do we have a "nationalist" here who seems to be hurt?
These comments violate the HN guidelines. Please read those and follow them:
It's government is supremely incompetant, but a evil police state, it is not. If anything, it is a functioning anarchy with a - largely - parasitic Government.
FYI, the Mozilla inclusion request is in https://bugzilla.mozilla.org/show_bug.cgi?id=557167