Transaction Assurance Level

Tables below show color-coded levels of assurance that a transaction won’t be canceled by some fork.

For example, at normal security level, if the attacker’s stake is 10% (or $6 millions for Cardano market capitalization of $60 millions), the levels of assurance for a user’s transaction are:

  1. Lowest assurance (color-coded with red) — when the user’s block with coin transfer transaction has depth less than 3 blocks.
  2. Medium assurance (color-coded with yellow) — when the user’s block has depth from 3 to 7 blocks.
  3. High assurance (color-coded with green) — when the user’s block has depth 9 or more blocks.

Normal Security Level

Normal level is for covert adversaries (the model is described in the latest version of Ouroboros being prepared now to be shared). Values in the table correspond to Cardano market capitalization of $60 millions.

Attackers' stake, % Attackers’ stake, $ mln Assurance level
Low 0.950 0.990 0.995 0.999 High
10 6 < 3 3 5 7 9 9 <
15 9 < 5 5 9 11 15 15 <
20 12 < 7 7 13 15 21 21 <
25 15 < 9 9 19 23 33 33 <
30 18 < 17 17 31 39 55 55 <
35 21 < 29 29 57 71 101 101 <
40 24 < 67 67 133 163 235 235 <
45 27 < 269 269 539 661 951 951 <
46 27.6 < 421 421 843 1033 1487 1487 <
47 28.2 < 751 751 1501 1841 2649 2649 <
48 28.8 < 1691 1691 3381 4143 5965 5965 <
49 29.4 < 6763 6763 13527 16585 23869 23869 <

Strict Security Level

Strict security level protects against all types of adversaries (it requires more block confirmations). Values in the table correspond to Cardano market capitalization of $60 millions.

Attackers' stake, % Attackers’ stake, $ mln Assurance level
Low 0.950 0.990 0.995 0.999 High
10 6 < 5 5 9 11 15 15 <
15 9 < 7 7 14 16 23 23 <
20 12 < 12 12 21 25 35 35 <
25 15 < 19 19 34 40 55 55 <
30 18 < 32 32 57 68 94 94 <
35 21 < 63 63 111 132 181 181 <
40 24 < 157 157 274 325 443 443 <
45 27 < 729 729 1246 1470 1990 1990 <
46 27.6 < 1190 1190 2020 2379 3214 3214 <
47 28.2 < 2230 2230 3758 4418 5953 5953 <
48 28.8 < 5382 5382 8986 10542 14157 14157 <
49 29.4 < 24029 24029 39603 46320 61922 61922 <