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
