{
  "ca-list":
  [
    {
        "ca-prefix": "/ndn/edu/ucla/CA",
        "ca-info": "UCLA's ceritificate authority, located in BH4805.",
        "probe": "Please use your email address to apply a namespace first. UCLA email is preferred.",
        "supported-challenges":
        [
            { "type": "PIN" },
            { "type": "EMAIL" }
        ]
    },
    {
        "ca-prefix": "/ndn/edu/ucla/zhiyi/CA",
        "ca-info": "Zhiyi's own ceritificate authority",
        "supported-challenges":
        [
            { "type": "PIN" }
        ]
    }
  ]
}