Assurance Level Change text update

[Tim Cappalli]

openid-caep-specification-1_0.md

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In the first scenario, Assurance Level Change will signal an increase, while in the second scenario it will be signal a decrease. For example, a user can start a session with Service Provider A using single factor authentication (such as a password). The user can then open start another session with Service Provider B using two-factor authentication (such as OTP). In this scenario, an increase Assurance Level Change event will signal to Service Provider A that the user has authenticated with a stronger authentication method.

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