integrity of entries

[Zeev Pekar]

Hi,

does gnucash has a mechanism to ensure integrity of entries, i.e. if an invoice was issued there is no way to edit or delete it in "invisble" way (like commits in some version control systems), even by manipulating the source code?
If not - can such functionality be implemented in a) "stand alone" manner or b) with some central institution providing some kind of digital keys?
If I add this as feature request what are the chances that it will be implemented in some near future? (Otherwise authorities will not recognize my bookkeeping).

Best regards,
Zeev