Re: [HACKERS] RFC: CRC datatype

[Nathan Myers]

On Sat, Dec 09, 2000 at 12:03:52AM +1100, Horst Herb wrote:
> AFAIK the thread for "built in" crcs referred only to CRCs in
> the transaction log. 

We have been discussing checksums for both the table blocks and for
the transaction log.

> Always remember that a psotgres data base on the harddisk can be
> manipulated accidentally / maliciously without postgres even running.
> These are the cases where you need row level CRCs.

"There is no security without physical security."  If somebody can
change the row contents, they can also change the row and/or block 
checksum to match.

Nathan Myers
[EMAIL PROTECTED]