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Document the where the client gets the message index from

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Mark Haines 2016-10-21 15:48:44 +01:00
parent 8641ef299e
commit 6a5b66d2d8
1 changed files with 4 additions and 3 deletions
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supporting-docs/guides/2016-10-18-e2e_implementation.rst
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@ -327,9 +327,10 @@ Megolm session (see `below`__), the ciphertext can be
decrypted by passing the ciphertext into ``olm_group_decrypt``. decrypted by passing the ciphertext into ``olm_group_decrypt``.
In order to avoid replay attacks a client should remember the megolm In order to avoid replay attacks a client should remember the megolm
``message_index`` of each event they decrypt for each session. If the client ``message_index`` returned by ``olm_group_decrypt`` of each event they decrypt
decrypts an event with the same ``message_index`` as one that it has already for each session. If the client decrypts an event with the same
decrypted using that session then it should fail decryption. ``message_index`` as one that it has already decrypted using that session then
it should fail decryption.
__ `m.room_key`_ __ `m.room_key`_