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Subject: Re: [office] Digital Signature proposal
On 30/07/08 10:28 AM, "Dave Pawson" <dave.pawson@gmail.com> wrote: > Comlex = fragile? Sounds an unwarranted risk if the document is important. > Especially over a long time. > You'd also need the inverse program to extract it - same as archiving > any application for a long period. Very risky. > No!! Definitely not fragile. There are just so many places that a dSig can be compromised. Any implementation worth it's weight has to implement a min. list of features to prevent attacks. Decoupling the signature from the algorithm also facilitates better migration/compatibility as things like DES get cracked and people migrate to Dr. Rinjdael's AES algorithm using 4 rounds on non-linear substitution. In mast use cases we have encountered, the minimum use cases include the same basic functionality. Also it is far less risky that a proprietary approach where the company might not support the format in the future. PDF-A was specifically engineered to be usable in 100 years, even if Adobe falls into the ocean. It sounds like this TC has not documented dSig requirements from users. As a big fan of ODF, I would like to suggest we consider collecting some as I would hate to see implementations of ODF get pushed aside based on not meeting the basic requirements for dSig. I can help reach out to the Canadian Government, maybe UK, Austria, Germany and US too. Thoughts? Duane -- ********************************************************************** Senior Technical Evangelist - Adobe Systems, Inc. Duane's World TV Show - http://www.duanesworldtv.org/ Blog - http://technoracle.blogspot.com Community Music - http://www.mix2r.com My Band - http://www.myspace.com/22ndcentury Adobe MAX 2008 - http://technoracle.blogspot.com/2007/08/adobe-max-2008.html **********************************************************************
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