Hi Hyoklee no :-) it is unfortunately proprietary code for the moment, maybe at some point we share it as soon as we have a project with THG (cc Quincey). However, I can tell you that compared to using filters it is by far the most efficient method to encrypt the file.
Cheers Dimitris 2014-03-21 14:05 GMT+01:00 H. Joe Lee <[email protected]>: > Hi Dimitris, > > Your work sounds very interesting. Is it possible to share your code > as an open source project to the community? Or is it already available > somewhere for download and test? > -- > Are your big (Earth) data in HDF(-EOS)? > > > On Fri, Mar 21, 2014 at 5:28 AM, Dimitris Servis <[email protected]> > wrote: > > Hi Jim > > > > I have written a non-terminal VFL driver that segregates the metadata and > > encrypts it. > > > > Cheers > > > > Dimitris > > > > > > 2014-03-21 11:23 GMT+01:00 huebbe > > <[email protected]>: > > > >> While it is possible to perform some encryption in a filter, the filter > >> mechanism is not designed for encryption. The problem is the key: > >> Filters don't get arbitrary data from the calling application to do the > >> decryption, they get only data that is stored in the file. Otherwise, > >> the HDF5 library would not be able to do the decoding in a completely > >> transparent way. And if you put the key into the file (as filter > >> options, or similar), the NSA will be happy. > >> > >> To use the filter mechanism for encryption, you would need to get the > >> key via a side-channel. This is possible, but it will be hard to do this > >> in a usable and portable fashion. For instance, you cannot just pop up a > >> dialog asking for a key, because many programs using HDF5 don't even > >> have a text terminal connected to them while they run. > >> > >> Also note that filtering does not touch the metadata in the file. I. e. > >> the NSA will be able to see the entire description of what is encoded in > >> the file, they will just not have the actual data. > >> > >> If you want security, just use gpg to encrypt the entire file. > >> > >> Cheers, > >> Nathanael Hübbe > >> > >> > >> > >> On 03/21/2014 12:44 AM, Rowe, Jim wrote: > >> > Hello - has anyone used a symmetric encryption filter with HDF5? I > >> > would like to introduce encryption (AES, DES, 3DES) in the pipeline > >> > after zlib compression to encrypt some datasets. > >> > > >> > > >> > > >> > Any examples, starting points, or suggestions would help. > >> > > >> > > >> > > >> > > >> > > >> > Thanks! > >> > > >> > --Jim > >> > > >> > > >> > > >> > > >> > > >> > _______________________________________________ > >> > Hdf-forum is for HDF software users discussion. > >> > [email protected] > >> > > >> > > http://mail.lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org > >> > > >> > >> > >> -- > >> Please be aware that the enemies of your civil rights and your freedom > >> are on CC of all unencrypted communication. Protect yourself. > >> > >> > >> _______________________________________________ > >> Hdf-forum is for HDF software users discussion. > >> [email protected] > >> > >> > http://mail.lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org > >> > > > > > > _______________________________________________ > > Hdf-forum is for HDF software users discussion. > > [email protected] > > > http://mail.lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org > > > > _______________________________________________ > Hdf-forum is for HDF software users discussion. > [email protected] > > http://mail.lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org >
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