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using encrypted phone number attribute for subject

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  • Hi every one

    I need to use the digital certificate subscriber phone number as an attribute for subject field, but as i don't want the phone number to be shown to every one i want to use encrypted phone number whose  OID  is 2.5.4.20.2. but there are some questions:

    1. how can i encrypt the phone number?

    2. how to set the attribute in certificate?

    3. If i use this attribute, how can reliant parties decrypt phone number if they need it to authorize the certificate holder?

    יום רביעי 13 יוני 2018 11:00