Comments for page "Database Encryption" http://wiki.neodatis.org/database-encryption/comments/show Sat, 31 Jul 2010 09:05:49 +0000 http://wiki.neodatis.org/database-encryption/comments/show#post-94513 Re: Variable block size http://wiki.neodatis.org/database-encryption/comments/show#post-94513 Sun, 20 Jan 2008 20:59:27 +0000 gslender 70778 I think there is a way around this problem - you would just treat all read/writes as if they are in blocks.

Example: if you had 4 byte blocks, a read at pos 3 would be in the 1st block. The next read at pos 5 would be in the 2nd. An update of bytes read from pos 3 to pos 5 would 1st re-write 1st block (read all 1-4 bytes, update 3-4 bytes and then write all 1-4 back) and then write the 2nd block (read all 5-8 bytes, update byte 5 and then write all 5-8 back).

I would expect this overhead to be slow and sure its complex, but I don't see a major problem.

]]> http://wiki.neodatis.org/database-encryption/comments/show#post-94349 Variable block size http://wiki.neodatis.org/database-encryption/comments/show#post-94349 Sun, 20 Jan 2008 13:41:44 +0000 Olivier Smadja 49395 One of the biggest issue is that ODB does not use fixed blocked to write object data and sometimes ODB access directly one part of the object data to do "in place update". I am not sure how encryption would work with that characteristic.

The next file format version of ODB will have fixed size blocks.

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