Installation
npm i --save loopback-encryption-mixin

In your model-config.json: add "../node_modules/loopback-encryption-mixin" as a mixin

{
    "...": "...",
    "mixins": [
      "loopback/common/mixins",
      "loopback/server/mixins",
      "../common/mixins",
      "./mixins",
      "../node_modules/loopback-encryption-mixin"
    ],
    "....": "..."
}

Then add the mixin to your model

{
"...": "...",
"mixins": {
    "Encryption": {
      "fields": ["name"],
      "password": "mypassword",
      "salt": "jkncjahksdjahsdkjhasjdhasdhkjasna",
      "iteration": 100,
      "hashBytes": 16,
      "hashAlgorithm": "sha1",
      "hexIv": "cd5c632d26fde5e2eb61e521ad2b91ba",
      "encryptionAlgorithm": "aes-128-cbc"
    }
  },
 "properties": {
    "...": "..."
  },
 "....": "..."
 }

Options Explained

Options	Description
fields	the properties of the model that need to be encrypted
password	the password of the encryption
salt	salt for hashing the password
iteration	iteration of the hash
hashBytes	the hash bytes corresponding to your hash algorithm and encryption algorithm
hashAlgorithm	Hash algorithm
hexIv	iv used for encryption in HEX format
encryptionAlgorithm	Encryption Algorithm corresponding to your iv and password format