{
  "name": "Message authentication codes(MAC)",
  "order": 7,
  "challenges": [
    {
      "id": "59a5801209a6acac5983b671",
      "title": "Nested MACs and HMAC",
      "description": [
        ""
      ],
      "challengeSeed": [
        ""
      ],
      "tests": [
        ""
      ]
    },
    {
      "id": "59a5801209a6acac5983b204",
      "title": "CBC-MAC and authenticated encryption",
      "description": [
        ""
      ],
      "challengeSeed": [
        ""
      ],
      "tests": [
        ""
      ]
    }
  ]
}