p2p card game

gistfile1.txt

player1 deck - d1
player2 deck - d2

d1_e == e(ki, d1)
d2_e == e(ki, d2)

p1 <-- d1, d2_e
p2 <-- d2, d1_e

seed - s

shuffle(s, d1)

verify:
shuffle(s, d1_e) == e(shuffle(s, d1))

d1 <-- d1_e[0]

server: regenerate hashes:
server <-- p1 (d1)
server <-- p2 (d1_e)
verify:
    d1_e == e(d1)
    d1_e = e2(d1)

----------- only verify when a card is revealed

verify when (if not already verified):
    summoned
    sent to grave
    banished
    show hand
    show card from hand
    reveal cards from top of deck
    change control
    activate set card
    play card from hand

verify by sending d1_e[i] and ki to opponent
opponent decrypts d1_e[i] to get card

rehash when:
    card sent back to deck

rehash:
    p1 --> e(ki, d1_e) --> d1_e2 --> p2
    shuffle

new verify
    p1 --> [k1, k2], d1_e[0] --> p2
    p2 --> d(k2, d1_e2[0]) --> d1_e[0]
    p2 --> d1_e[0] exists in old d1_e in same quantity
    p2 --> d(k1, d1_e[0]) --> original
    map original to d1_e2[0] discared d1_e[0]
    rehash