Realm 암호화 - Kotlin SDK

// return a random key from the given seed
fun getRandomKey(seed: Long? = null): ByteArray {
    // generate a new 64-byte encryption key
    val key = ByteArray(64)
    if (seed != null) {
        // If there is a seed provided, create a random number with that seed
        // and fill the byte array with random bytes
        Random(seed).nextBytes(key)
    } else {
        // fill the byte array with random bytes
        Random.nextBytes(key)
    }
    return key
}
runBlocking {
    // Create the configuration
    val config = RealmConfiguration.Builder(setOf(Frog::class))
        // Specify the encryption key
        .encryptionKey(generatedKey)
        .build()
    // Open the realm with the configuration
    val realm = Realm.open(config)
    Log.v("Successfully opened encrypted realm: ${realm.configuration.name}")
}

val syncConfig = SyncConfiguration.Builder(user, setOf(Frog::class))
    .initialSubscriptions { realm ->
        add(realm.query<Frog>())
    }
    // Specify the encryption key
    .encryptionKey(generatedKey)
    .build()
val realm = Realm.open(syncConfig)
Log.v("Successfully opened encrypted realm: ${realm.configuration.name}")