Fix incorrect comment. Geli will protect against data modification, of

course! It won't protect against reply attacks - try harder to explain
them correctly.

MFC after:	1 week

1 files changed, 6 insertions, 5 deletions

diff --git a/sbin/geom/class/eli/geli.8 b/sbin/geom/class/eli/geli.8
index d86f5279ea87..3f1da7286893 100644
--- a/sbin/geom/class/eli/geli.8
+++ b/sbin/geom/class/eli/geli.8
@@ -630,12 +630,13 @@ The offset and size of the corrupted data will be printed on the console.
 It is important to know against which attacks
 .Nm
 provides protection for your data.
-If data is modified or copied from one place on the disk
-to another,
+If data is modified in-place or copied from one place on the disk
+to another even without modification,
 .Nm
-should be able to detect such a modification.
-If an attacker can remember the encrypted data, modify them and write them
-back to the same place, the modification will not be detected.
+should be able to detect such a change.
+If an attacker can remember the encrypted data, he can overwrite any future
+changes with the data he owns without notice.
+In other words
 .Nm
 will not protect your data against replay attacks.
 .Sh SEE ALSO