If you've got the ciphertext and you know a record specifies admin permission flag in bit position 13, and you know it's set currently to false, you can just flip the bit whether it's currently set to 1 or 0:
v-- here
0110001100101001
0100001100101001 <- flipped
Now you've got admin permission just by flipping a bit. The
Confidentiality is often not enough
.. you also probably want non-malleability.
If you've got the ciphertext and you know a record specifies admin permission flag in bit position 13, and you know it's set currently to false, you can just flip the bit whether it's currently set to 1 or 0:
Now you've got admin permission just by flipping a bit. The