nexus/bip39
2
0
Fork 0
mirror of https://github.com/OneKeyHQ/bip39.git synced 2026-04-05 18:43:47 +00:00
Code Issues Packages Projects Releases Wiki Activity

Multiple decks of cards are possible

Browse Source 
but also a needless oversupply of entropy
This commit is contained in:
Ian Coleman
2016-11-16 12:21:17 +11:00
parent 9bc39377aa
commit fc8c404133
2 changed files with 11 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
src/js/index.js
View File

@@ -846,9 +846,13 @@
// eg the second last card can be only one of two, not one of fifty two
// so the added entropy for that card is only one bit at most
if (entropy.base.asInt == 52) {
var totalCombos = factorial(52);
var remainingCards = 52 - entropy.base.parts.length;
var remainingCombos = factorial(remainingCards);
var totalDecks = Math.ceil(entropy.base.parts.length / 52);
var totalCards = totalDecks * 52;
var totalCombos = factorial(52).pow(totalDecks);
var totalRemainingCards = totalCards - entropy.base.parts.length;
var remainingDecks = Math.floor(totalRemainingCards / 52);
var remainingCards = totalRemainingCards % 52;
var remainingCombos = factorial(52).pow(remainingDecks) * factorial(remainingCards);
var currentCombos = totalCombos.divide(remainingCombos);
bitsStr = currentCombos.toString(2).length.toString();
}

8
tests.js
View File

@@ -2644,7 +2644,7 @@ page.open(url, function(status) {
entropy: "ac2c3c4c5c6c7c8c9ctcjcqckcad2d3d4d5d6d7d8d9dtdjdqdkdah2h3h4h5h6h7h8h9hthjhqhkhas2s3s4s5s6s7s8s9stsjsqsks3d",
type: "card (full deck, 1 duplicate: 3d)",
events: 53,
bits: 226,
bits: 232,
words: 27,
strength: "extremely strong",
},
@@ -2652,7 +2652,7 @@ page.open(url, function(status) {
entropy: "ac2c3c4c5c6c7c8c9ctcjcqckcad2d3d4d5d6d7d8d9dtdjdqdkdah2h3h4h5h6h7h8h9hthjhqhkhas2s3s4s5s6s7s8s9stsjsqs3d4d",
type: "card (2 duplicates: 3d 4d)",
events: 53,
bits: 226,
bits: 232,
words: 27,
strength: "extremely strong",
},
@@ -2660,7 +2660,7 @@ page.open(url, function(status) {
entropy: "ac2c3c4c5c6c7c8c9ctcjcqckcad2d3d4d5d6d7d8d9dtdjdqdkdah2h3h4h5h6h7h8h9hthjhqhkhas2s3s4s5s6s7s8s9stsjsqs3d4d5d6d",
type: "card (4 duplicates: 3d 4d 5d...)",
events: 53,
bits: 226,
bits: 243,
words: 27,
strength: "extremely strong",
},
@@ -2669,7 +2669,7 @@ page.open(url, function(status) {
entropy: "ac2c3c4c5c6c7c8c9ctcjcqckcad2d3d4d5d6d7d8d9dtdjdqdkdah2h3h4h5h6h7h8h9hthjhqhkhas2s3s4s5s6s7s8s9stsjsqsksac2c3c4c5c6c7c8c9ctcjcqckcad2d3d4d5d6d7d8d9dtdjdqdkdah2h3h4h5h6h7h8h9hthjhqhkhas2s3s4s5s6s7s8s9stsjsqsks",
type: "card (full deck, 52 duplicates: ac 2c 3c...)",
events: 104,
bits: 226,
bits: 452,
words: 54,
strength: "extremely strong",
},