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akwizgran created page: BSP

akwizgran
2015-03-18 10:42:53 +00:00
parent 327ac3bd51
commit b526dc18aa
1 changed files with 1 additions and 1 deletions
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BTP.markdown

@@ -47,7 +47,7 @@ Each device derives four initial keys from S:
* btk = KDF(S, "BOB_TAG_KEY")
* bck = KDF(S, "BOB_CIPHER_KEY")
Alice initialises her outgoing tag and cipher keys to otk = atk and ock = ack, and her incoming tag and cipher keys to itk = btk and ick = bck. Bob initialises his outgoing tag and cipher keys to otk = btk and ock = bck, and his incoming tag and cipher keys to itk = atk and ick = ack. Thus Alice's outgoing keys are Bob's incoming keys and vice versa. Both devices then erase S.
Alice initialises her outgoing tag and cipher keys otk = atk and ock = ack, and her incoming tag and cipher keys itk = btk and ick = bck. Bob initialises his outgoing tag and cipher keys otk = btk and ock = bck, and his incoming tag and cipher keys itk = atk and ick = ack. Thus Alice's outgoing keys are Bob's incoming keys and vice versa. Both devices then erase S.
### Key rotation