change header signature and add block checksumming

1 files changed, 5 insertions, 4 deletions

diff --git a/fsverify-paper.md b/fsverify-paper.md
index 82b9cf8..819c422 100644
--- a/fsverify-paper.md
+++ b/fsverify-paper.md
@@ -2,19 +2,20 @@
 The FsVerify partition contains a header with the necessary metadata for the filesystem verification, and a bbolt database containing all File and Directory nodes to be checked.
 
 ## Partition Header
-`<magic number> <signature> <filesystem size> <table size> <table unit>`
+`<magic number> <untrusted signature hash> <trusted signature hash> <filesystem size> <table size> <table unit>`
 
 Field|Size|Purpose|Value
 -----|----|-------|-----
 magic number|2 bytes|sanity check|0xACAB
-signature|302 bytes|minisign signature|
+untrusted signature hash|100 bytes|untrusted signature from minisign
+trusted signature hash|88 bytes|trusted signature from minisign
 filesystem size|4 bytes|size of the original filesystem in gb
-table size|4 bytes| size of the table in \<table unit\>
+table size|4 bytes| size of the table in <table unit\>
 table unit|1 byte|unit of the table size|0x0: bytes, 0x1: kilobytes, 0x2: megabytes, 0x3: gigabytes, 0x4: terabytes, 0x5: petabytes
 
 Due to the filesystem and table size field, which can go up to 0xFFFFFFFF (16777215), the maximum supported partition size and table size is 16777215gb (~16pb)
 
-The entire Head should be a total of 312 bytes long, reaching from 0x0 to 0x138
+The entire Head should be a total of 199 bytes long, reaching from 0x0 to 0xC7
 
 ## Partition Contents / Database
 The main database containing the checksums is a [bbolt](https://github.com/etcd-io/bbolt) datbase consisting of a single bucket called `Nodes`