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A key is derived from the password using a Password Based Key Derivation Function, in this case PBKDF2: Key = PBKDF2(HMAC−SHA1, passphrase, ssid, 4096, 256) PBKDF2 in turn is described by PKCS#5. These RSA cryptographic standards in turn are made available through RFC's nowadays, in this case RFC 2898: PKCS #5: Password-Based Cryptography Specification ...


In pairwise key hierarchy there are two root keys: pre-shared key (PSK) and Authentication, Authorization, and Accounting Key (AAAK). From these two keys pairwise master key (PMK) is derived. In the case of PSK, PMK is equal to PSK. In other case, PMK is obtained by taking the first 256 bits of AAAK. Now, to the question about generating pairwise transient ...

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