A security infrastructure for gaining trust in another realm's identity can be imagined with DNSSEC/DANE and certificates. Embedding this in actual authentication schemes, with minimal change, is quite a challenge. We found theoretic options in Kerberos and in SASL; the former scales well and the latter offers migration path for current password users.
Businesses and individuals boosting and enforcing their online security: End user, Small business, CIOs, Government, Developer, Domain hosting provider.
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NGI Project: NGI pointer
Keyword: Identity Technology