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[bip151] slightly increase robustness of the re-keying

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Jonas Schnelli 2016-08-07 22:24:37 +02:00
parent 0c8256f764
commit 55163e4546
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@ -148,7 +148,7 @@ If more data is present, another message must be deserialized. There is no expli
A responding peer can inform the requesting peer over a re-keying with a <code>encack</code> message containing 33byte of zeros to indicate that all encrypted message following after this <code>encack</code> message will be encrypted with ''the next symmetric cipher key''. A responding peer can inform the requesting peer over a re-keying with a <code>encack</code> message containing 33byte of zeros to indicate that all encrypted message following after this <code>encack</code> message will be encrypted with ''the next symmetric cipher key''.
The new symmetric cipher key will be calculated by <code>SHA256(SHA256(old_symetric_cipher_key))</code>. The new symmetric cipher key will be calculated by <code>SHA256(SHA256(session_id || old_symmetric_cipher_key))</code>.
Re-Keying interval is a peer policy with a minimum timespan of 10 seconds. Re-Keying interval is a peer policy with a minimum timespan of 10 seconds.