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Solaris 8 Security by Edgar Danielyan

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The Differences Between Kerberos 4 and 5

There are a number of noticeable differences between Kerberos versions 4 and 5:

  • Protocols used in Kerberos 4 and 5 differ.

  • Kerberos 5 supports forwardable, renewable, and postdateable tickets.

  • Kerberos 5 is network protocol-independent.

  • Kerberos 5 tickets can contain more than one network address.

  • Kerberos 5 supports cross-realm authentication.

  • Encryption algorithms other than DES can be used in Kerberos 5.

It should be noted that Kerberos 4 clients can communicate with a Kerberos 5 server, but Kerberos 5 clients cannot communicate with a Kerberos 4 server. Therefore, if you don’t have any existing systems that use Kerberos 4, start with Kerberos 5.

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