diff --git a/app/src/main/kotlin/main.kt b/app/src/main/kotlin/main.kt
index 1bec2e2..e0bba3a 100644
--- a/app/src/main/kotlin/main.kt
+++ b/app/src/main/kotlin/main.kt
@@ -1,12 +1,29 @@
 import model.UserAuthorize
+import java.security.KeyStore.SecretKeyEntry
+import java.security.SecureRandom
 import java.time.LocalDate
+import javax.crypto.SecretKeyFactory
+import javax.crypto.spec.PBEKeySpec
+import javax.crypto.spec.SecretKeySpec
 
 val authorizeList = mutableListOf<UserAuthorize>()
 fun main(){
-    authorizeList.add(registration())
-    authorizeList.forEach {
-        println(it)
-    }
+    val secureRandom = SecureRandom()
+    val salt = byteArrayOf()
+    secureRandom.nextBytes(salt)
+}
+
+fun hashedPassword(password: String, salt: ByteArray): String{
+    val pbeKeySpec = PBEKeySpec(
+        password.toCharArray(),
+        salt,
+        65536,
+        128)
+    val factory = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA1")
+    return factory.generateSecret(pbeKeySpec).encoded.toString()
+}
+fun matches(password: String, passwordHashed: String, salt: ByteArray): Boolean{
+    return  hashedPassword(password, salt).contentEquals(passwordHashed)
 }
 fun registration(): UserAuthorize {
     val userLogin = readlnOrNull()
@@ -14,6 +31,11 @@ fun registration(): UserAuthorize {
     require(userLogin.length >= 4){
         "Никнейм должен быть больше 4 символов"
     }
+    userLogin.forEach {
+        require(it.isLetterOrDigit())
+        require("@" in userLogin)
+        require(userLogin.contains("@"))
+    }
     return UserAuthorize(
         authorizeList.size + 1,
         password = "123",