Digital Signature
Digital Signature
(OP)
Does anyone know anything about digital signatures? Texas does not allow a scanned image of a signed seal, but it will allow a digital signature that will be removed if the electronic file is altered. The last set of drawings I issued, I had them printed out, then I signed them, and then scanned them back to pdf. The quality of the drawings wasn't that good due to the scanning. Not to mention much more work was involved. Can anyone help?
RE: Digital Signature
RE: Digital Signature
Adobe seems to be the only program that can make this work. Any suggestions?
RE: Digital Signature
BTW, what I meant by sending the stamped file to kinkos was sending it as plot file or PDF. So the signed seal wont be floating around in AutoCAD.
RE: Digital Signature
The scanned image in adobe might work. I am going to work on it.
RE: Digital Signature
RE: Digital Signature
RE: Digital Signature
Many states allow electronic signatures, but only if they comply with accepted encryption techniques that allow the signer (and others) to know if (a) the document is the original; and (b) if it has been changed or modified since it was digitally signed.
RE: Digital Signature
See the Banjo plug-in for Adobe Acrobat
http://www.linetype.com/products/banjo/index.htm
I've been wanting to do this myself, but the restrictions on the Banjo license seem a bit cumbersome compared to a physical seal or stamp. Still,....it may be just what some of you are looking for.
Jeff
RE: Digital Signature
RE: Digital Signature
RE: Digital Signature
RE: Digital Signature
Ohio should permit electronic seals beginning later this year. Supposedly, the provision was included in a capital improvement budget bill passed shortly before the recent change in state administration.
Jeff
RE: Digital Signature
At any rate, technology is getting there. Just got to work out the kinks.
RE: Digital Signature
I would love to see an implementation (even non-Banjo) where the software license is tied to a physical token (such as a hardware key) or is available as a site license to provide greater flexibility of use.
There are other issues I have with Banjo, including the management of private keys, which appear to currently reside on the computer where a specific copy of Banjo is licensed.
I would prefer that private keys be able to reside on a portable physical token, and be encrypted using a strong encryption method, with the use of strong passwords enforced.
Jeff
RE: Digital Signature
RE: Digital Signature
Not many, from what I understand.
Part of my rant above has to do with my lack of understanding of how Windows (XP in particular) and Acrobat store and protect digital certificates that contain private key information. I apologize to everyone for giving the impression that I have specific knowledge of a problem with Banjo in this regard. (I may have gotten a bit carried away in my previous post, and be overly paranoid on this point.)
To get back to your question, I did recently find a few other packages, but neither seemed as good a fit for 'plugging and chugging' as Banjo. (See "ApproveIt" www.silanis.com and "CoSign" www.arx.com )
Jeff
RE: Digital Signature
Banjo does get assigned to one computer, but you can transfer the license to a different computer. Since I am supposed to be the sole person in control of my signature (board rules), having it on my laptop seems to be best place for it anyway. My only complaint is coordinating with clients and reprographics companies to get drawings printed out. They have to verify my signature, which is easy but takes a little time and gets annoying to all parties involved.
RE: Digital Signature
RE: Digital Signature
(1) unique to the person using it.
(2) capable of verification.
(3) under the sole control of the person using it.
(4) linked to a document in such a manner that the electronic signature is invalidated if any data in the document are changed.
The banjo plug in does all of these. You might be able to get adobe to do these, but I think 2 and 4 will be tough. This is the problem I am dealing with though. Unless the person who has the file takes the time to do (2), (4) will happen. "Unverified" appears over my seal, which obviously won't get you any permits.
RE: Digital Signature
I guess the points that I am really trying to make are:
1) The Banjo developers are taking an easy route by binding the license with a specific CPU (it's either hard or impossible to spoof the internal CPU serial number). Unless you have a laptop or a second copy of Banjo, you don't always have the ability to sign your documents using Banjo. Using a hardware lock or electronic license server should be a good compromise between ensuring piracy protection and flexibility of use.
2) Your private key data reside on the computer's hard drive (I would personally make a backup copy stored on some durable and secured media). This is really a personal key, and there may be situations where you don't want personal data residing on a device that is owned by your employer. At any rate, you should be able to permanently delete this information from the computer's drive. Your PE license is issued to you - you just indefinitely "rent" it to your employer in exchange for certain compensations.
3) What happens in the instance where there are multiple professionals signing documents (not necessarily the same documents)? Does the firm buy them each a copy of Banjo? I would imagine that it depends on the size of the firm, but it is not hard to imagine smaller firms installing one copy on the computer normally used by an adminisrtative assistant and having him or her "sign" all the electronic reports or drawings on behalf of the PEs.
I like some of the features of Banjo, but feel that the implementation of some of the licensing and key management could stand some improvement. Again, maybe I'm too paranoid.
IFRs,
FYI, Adobe 7.0 includes support for 3rd-party authenticated timestamps to be included in the digital signature.
Jeff
RE: Digital Signature
All I can say is that I am really happy that the Banjo plug in allows me to skip all the above and just make digital signed prints directly, and it allows me to comply with the board's signature requirements.
I don't work for the Banjo guys either! I think I should get an endorsement for all the good things I am saying.