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[KRB]

Kerberos Protocol

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[RSK:{ticket}]

RPC protocol with SASL mutual authentication using Kerberos tickets.

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[RST:{ticket}]

RPC protocol with SASL mutual authentication using delegation tokens.

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[RSD:{delegation-token}]

RPC protocol with SASL mutual authentication using delegation tokens.

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[DTP]

Data transfer protocol between the DataNode and a client. HTTP protocol with block tokens plus SHA1 hash exchange.

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tgt

Kerberos Ticket Granting Ticket

kp

Kerberos Principal: nn-kp = The Kerberos principal for the NameNode nn

kt

Kerberos Ticket: u-jt-kt = A Kerberos Ticket for User u to access the JobTracker jt

sk dt

Secret Key Delegation Token

dt tkn

Delegation Token

tkn-sk

Token Secret Key