Colorful Security Question

[ewx]

https://en.wikipedia.org/wiki/Red/black_concept describes a notation sometimes used when discussing confidentiality:

• red denotes signals carrying secret plaintext;
• black denotes signals carrying ciphertext.

Is there any generally agreed coloring for the analogous integrity question? i.e.:

• a color which denotes signals where integrity matters (or maybe this is "all of them" and we don't need a specific choice of color); and
• a color which indicates a signal with cryptographic integrity protection of some kind.

Non-color visual notations also welcome for several reasons:

1. things still get printed in monochrome;
2. color vision is not uniform among humans;
3. using too many color notations at once leads to angry fruit salad rather than clear diagrams.

Comments

Integrity

[martinbonner.livejournal.com]

Once a signal has cryptographic integrity protection, you don't have to worry about an attacker manipulating the message (just as, once a signal is encrypted, you don't have to worry about the attacker reading it).

Signals that aren't protected like that, have to be protected in other ways (like keeping them inside a potted module).

Once you have that distinction, it is useful to be able to show them graphically.

Of course, manipulating a signal requires a more powerful attacker than reading it (it's the difference between Schneier's "Mallory" and "Eve" figures).