Section 7.2.4. MS-CHAP-MPPE-Keys
Section 7.2.5. MS-MPPE-Send-Key
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Section 7.2.6. MS-MPPE-Recv-Key
7.2.5. MS-MPPE-Send-Key
Causes the key to be encrypted with the Client's shared secret according to RFC 2548. This is used by Microsoft MS-CHAP tunnelling.
MS-MPPE-Send-Key = mysendkey