Problems
- Difficult to secure.
- Difficult to scale.
- Difficult to distribute.
- Identities need private information to be useful, but privacy is difficult to ensure.
- Hailstorm is supposed to address this.
Privacy of information is focal point in Hailstorm web servicing. In fact, users of Hailstorm web services are empowered to manage the availability of their personal information through "affirmative consent".
- No specialized repositories.
- Requires acceptance of an agent rather than a protocol.
- white paper says it will evolve toward Kerberos and windows implementes (i think) a non-standard, patent-encumbered Kerberos.
- not free:
Passport intends to charge a nominal annual license fee to service operators. However, Microsoft is currently waiving fees.
