diff --git a/crypto/aes.go b/crypto/aes.go
new file mode 100644
index 0000000..237d043
--- /dev/null
+++ b/crypto/aes.go
@@ -0,0 +1,70 @@
+package crypto
+
+import (
+	"crypto/aes"
+	"crypto/cipher"
+	"encoding/base64"
+	"errors"
+)
+
+// AesEncrypt function
+// original The original password, salt is an optional variable.
+// If the salt exists, the passed variable is used.
+// If it does not exist, the system default salt value is used.
+func (e *Crypto) AesEncrypt(original string, key ...string) (string, error) {
+	var saltValue = defaultAesKey
+	if len(key) > 0 {
+		saltValue = key[0]
+	}
+
+	// Convert to byte array
+	origData := []byte(original)
+	k := []byte(saltValue)
+	if len(k) != 16 && len(k) != 24 && len(k) != 32 {
+		return "", errors.New("The length of the key should be 16 or 24 or 32")
+	}
+	// group key
+	block, _ := aes.NewCipher(k)
+	// Get the length of the key block
+	blockSize := block.BlockSize()
+	// Completion code
+	origData = pKCS7Padding(origData, blockSize)
+	// encryption mode
+	blockMode := cipher.NewCBCEncrypter(block, k[:blockSize])
+	// create array
+	crated := make([]byte, len(origData))
+	// encryption
+	blockMode.CryptBlocks(crated, origData)
+	return base64.StdEncoding.EncodeToString(crated), nil
+
+}
+
+// AesDecrypt function
+// original The original password, salt is an optional variable.
+// If the salt exists, the passed variable is used.
+// If it does not exist, the system default salt value is used.
+func (e *Crypto) AesDecrypt(crated string, salt ...string) (string, error) {
+	var saltValue = defaultAesKey
+	if len(salt) > 0 {
+		saltValue = salt[0]
+	}
+	// Convert to byte array
+	cratedByte, _ := base64.StdEncoding.DecodeString(crated)
+	k := []byte(saltValue)
+	if len(k) != 16 && len(k) != 24 && len(k) != 32 {
+		return "", errors.New("The length of the key should be 16 or 24 or 32")
+	}
+	// group key
+	block, _ := aes.NewCipher(k)
+	// Get the length of the key block
+	blockSize := block.BlockSize()
+	// encryption mode
+	blockMode := cipher.NewCBCDecrypter(block, k[:blockSize])
+	// create array
+	orig := make([]byte, len(cratedByte))
+	// decrypt
+	blockMode.CryptBlocks(orig, cratedByte)
+	// to complete the code
+	orig = pKCS7UnPadding(orig)
+	return string(orig), nil
+}
diff --git a/crypto/aes_test.go b/crypto/aes_test.go
new file mode 100644
index 0000000..5c135ae
--- /dev/null
+++ b/crypto/aes_test.go
@@ -0,0 +1,20 @@
+package crypto
+
+import (
+	"fmt"
+	"testing"
+)
+
+func TestCrypto_AesEncrypt(t *testing.T) {
+	fmt.Println(cryptoTool.AesEncrypt("xZwKptMh5VdCv_6gAnoO9b4YgwE8J6dy"))
+	//8xSzAOz2WjeZXfaxbW4ARKB63ta9EOeGp/wvmzHfUvA4Gd8AG32SeTlqqmEsinNO <nil>
+	fmt.Println(cryptoTool.AesEncrypt("xZwKptMh5VdCv_6gAnoO9b4YgwE8J6dy", "1234567812345678"))
+	//XCbjg7uyoIVeBvW0Wbt6vhtCgHFY3fFscbgkL8Ff7ZnbRduIT6qd/nw/qHsF1TEA <nil>
+
+}
+
+func TestCrypto_AesDecrypt(t *testing.T) {
+	fmt.Println(cryptoTool.AesDecrypt("XCbjg7uyoIVeBvW0Wbt6vhtCgHFY3fFscbgkL8Ff7ZnbRduIT6qd/nw/qHsF1TEA", "1234567812345678"))
+	//xZwKptMh5VdCv_6gAnoO9b4YgwE8J6dy <nil>
+
+}
diff --git a/crypto/des.go b/crypto/des.go
new file mode 100644
index 0000000..c764bfc
--- /dev/null
+++ b/crypto/des.go
@@ -0,0 +1,72 @@
+package crypto
+
+import (
+	"crypto/des"
+	"encoding/hex"
+	"errors"
+)
+
+// DesEncrypt des encrypted function
+// salt The parameter is the salt value of encryption and decryption, and the maximum
+// length is 8. If the length is exceeded, the corresponding exception will be thrown
+func (*Crypto) DesEncrypt(text string, key ...string) (string, error) {
+	k := []byte(defaultDesKey)
+	if len(key) > 0 {
+		k = []byte(key[0])
+		if len(k) > 8 {
+			return "", errors.New("DES The maximum length of the encrypted salt value is 8")
+		}
+	}
+	src := []byte(text)
+	block, err := des.NewCipher(k)
+	if err != nil {
+		return "", err
+	}
+	bs := block.BlockSize()
+	src = zeroPadding(src, bs)
+	if len(src)%bs != 0 {
+		return "", errors.New("What is required is an integer multiple of the size")
+	}
+	out := make([]byte, len(src))
+	dst := out
+	for len(src) > 0 {
+		block.Encrypt(dst, src[:bs])
+		src = src[bs:]
+		dst = dst[bs:]
+	}
+	return hex.EncodeToString(out), nil
+}
+
+// DesDecrypt des encrypted function
+// salt The parameter is the salt value of encryption and decryption, and the maximum
+// length is 8. If the length is exceeded, the corresponding exception will be thrown
+func (*Crypto) DesDecrypt(decrypted string, key ...string) (string, error) {
+	k := []byte(defaultDesKey)
+	if len(key) > 0 {
+		if len(key[0]) > 8 {
+			return "", errors.New("DES The maximum length of the encrypted salt value is 8")
+		}
+		k = []byte(key[0])
+	}
+	src, err := hex.DecodeString(decrypted)
+	if err != nil {
+		return "", err
+	}
+	block, err := des.NewCipher(k)
+	if err != nil {
+		return "", err
+	}
+	out := make([]byte, len(src))
+	dst := out
+	bs := block.BlockSize()
+	if len(src)%bs != 0 {
+		return "", errors.New("crypto/cipher: input not full blocks")
+	}
+	for len(src) > 0 {
+		block.Decrypt(dst, src[:bs])
+		src = src[bs:]
+		dst = dst[bs:]
+	}
+	out = zeroUnPadding(out)
+	return string(out), nil
+}
diff --git a/crypto/des_test.go b/crypto/des_test.go
new file mode 100644
index 0000000..d657943
--- /dev/null
+++ b/crypto/des_test.go
@@ -0,0 +1,19 @@
+package crypto
+
+import (
+	"fmt"
+	"testing"
+)
+
+func TestCrypto_DesEncrypt(t *testing.T) {
+	fmt.Println(cryptoTool.DesEncrypt("xZwKptMh5VdCv_6gAnoO9b4YgwE8J6dy"))
+	//42002eb4f920ed0f228c833c3d54ab3d7c7e1dd8999306ede9e2cfd9c5d5b7356c2951efbc920e68 <nil>
+	fmt.Println(cryptoTool.DesEncrypt("xZwKptMh5VdCv_6gAnoO9b4YgwE8J6dy", "12345678"))
+	//276b7af582c1aa7b99ef89bf9aac3b62dee2179b2e58208af0225d6094cd99d93d7595a98bff809d <nil>
+
+	fmt.Println(cryptoTool.DesDecrypt("42002eb4f920ed0f228c833c3d54ab3d7c7e1dd8999306ede9e2cfd9c5d5b7356c2951efbc920e68"))
+	//xZwKptMh5VdCv_6gAnoO9b4YgwE8J6dy <nil>
+	fmt.Println(cryptoTool.DesDecrypt("276b7af582c1aa7b99ef89bf9aac3b62dee2179b2e58208af0225d6094cd99d93d7595a98bff809d", "12345678"))
+	//xZwKptMh5VdCv_6gAnoO9b4YgwE8J6dy <nil>
+
+}
diff --git a/crypto/entry.go b/crypto/entry.go
index bf26c89..5befc91 100644
--- a/crypto/entry.go
+++ b/crypto/entry.go
@@ -1,4 +1,38 @@
 package crypto
 
+import "bytes"
+
 type Crypto struct {
 }
+
+const defaultAesKey = "wVQvqtER8xzTLKB0f9Y4S_30ZF0rEDAN" //8 16 32
+const defaultDesKey = "Xj9UnbYA"                         //max 8
+
+// complement method
+func pKCS7Padding(ciphertext []byte, blocksize int) []byte {
+	padding := blocksize - len(ciphertext)%blocksize
+	padtext := bytes.Repeat([]byte{byte(padding)}, padding)
+	return append(ciphertext, padtext...)
+}
+
+// to code method
+func pKCS7UnPadding(origData []byte) []byte {
+	length := len(origData)
+	unpadding := int(origData[length-1])
+	return origData[:(length - unpadding)]
+}
+
+// zeroPadding zero padding function
+func zeroPadding(ciphertext []byte, blockSize int) []byte {
+	padding := blockSize - len(ciphertext)%blockSize
+	padtext := bytes.Repeat([]byte{0}, padding)
+	return append(ciphertext, padtext...)
+}
+
+// zeroUnPadding zero unPadding function
+func zeroUnPadding(origData []byte) []byte {
+	return bytes.TrimFunc(origData,
+		func(r rune) bool {
+			return r == rune(0)
+		})
+}
diff --git a/rand/init.go b/rand/init.go
new file mode 100644
index 0000000..c218f62
--- /dev/null
+++ b/rand/init.go
@@ -0,0 +1,11 @@
+package rand
+
+import (
+	"math/rand"
+	"time"
+)
+
+func init() {
+	rand.Seed(time.Now().UnixNano()) // 纳秒时间戳
+
+}
diff --git a/rand/password.go b/rand/password.go
index 6708a81..1eb6c04 100644
--- a/rand/password.go
+++ b/rand/password.go
@@ -3,39 +3,44 @@ package rand
 import (
 	"bytes"
 	"math/rand"
-	"time"
 )
 
 func (rr *Rand) randomGetSomeChar(str string, l int) string {
 	bytes := []byte(str)
-	result := []byte{}
-	r := rand.New(rand.NewSource(time.Now().UnixNano()))
+	var result []byte
+	//r := rand.New(rand.NewSource(time.Now().UnixNano()))
 	for i := 0; i < l; i++ {
-		result = append(result, bytes[r.Intn(len(bytes))])
+		//result = append(result, bytes[r.Intn(len(bytes))])
+		result = append(result, bytes[rand.Intn(len(bytes))])
 	}
 	return string(result)
 }
 
-func (r *Rand) GetPassword(len int) string {
-	base_num := "023456789"
-	base_char_low := "abcdefghijkmnpqrstuvwxyz"
-	base_char_high := "ABCDEFGHJKLMNOPQRSTUVWXYZ"
-	base_sign_spec := "_"
+// 长度选填 默认32位
+func (rr *Rand) GetPassword(length ...int) string {
+	baseNum := "023456789"
+	baseCharLow := "abcdefghijkmnpqrstuvwxyz"
+	baseCharHigh := "ABCDEFGHJKLMNOPQRSTUVWXYZ"
+	baseSignSpec := "_"
 	str := "023456789abcdefghijkmnopqrstuvwxyzABCDEFGHJKLMNOPQRSTUVWXYZ_"
 	var stringBuilder bytes.Buffer
-	if len < 5 {
-		len = 5
+	lenPassword := 32
+	if len(length) > 0 {
+		lenPassword = length[0]
 	}
-	stringBuilder.WriteString(r.randomGetSomeChar(base_sign_spec, 1))
-	stringBuilder.WriteString(r.randomGetSomeChar(base_num, 1))
-	stringBuilder.WriteString(r.randomGetSomeChar(base_char_low, 1))
-	stringBuilder.WriteString(r.randomGetSomeChar(base_char_high, 1))
-	stringBuilder.WriteString(r.randomGetSomeChar(str, len-4))
-	str_result := stringBuilder.String()
-	arr_result := []byte(str_result)
+	if lenPassword < 5 {
+		lenPassword = 5
+	}
+	stringBuilder.WriteString(rr.randomGetSomeChar(baseSignSpec, 1))
+	stringBuilder.WriteString(rr.randomGetSomeChar(baseNum, 1))
+	stringBuilder.WriteString(rr.randomGetSomeChar(baseCharLow, 1))
+	stringBuilder.WriteString(rr.randomGetSomeChar(baseCharHigh, 1))
+	stringBuilder.WriteString(rr.randomGetSomeChar(str, lenPassword-4))
+	strResult := stringBuilder.String()
+	arrResult := []byte(strResult)
 	for i := 0; i < 4; i++ {
-		num := rand.Intn(len - 1)
-		arr_result[i], arr_result[num] = arr_result[num], arr_result[i]
+		num := rand.Intn(lenPassword - 1)
+		arrResult[i], arrResult[num] = arrResult[num], arrResult[i]
 	}
-	return string(arr_result)
+	return string(arrResult)
 }
diff --git a/rand/password_test.go b/rand/password_test.go
index e41b6e8..bc1bf9c 100644
--- a/rand/password_test.go
+++ b/rand/password_test.go
@@ -9,5 +9,6 @@ var randTool Rand
 
 func TestRand_GetPassword(t *testing.T) {
 	fmt.Println(randTool.GetPassword(32))
+	fmt.Println(randTool.GetPassword())
 
 }
diff --git a/rand/random.go b/rand/random.go
index 0c5f03e..9f261aa 100644
--- a/rand/random.go
+++ b/rand/random.go
@@ -3,15 +3,14 @@ package rand
 import (
 	"math/rand"
 	"strconv"
-	"time"
 )
 
 // 包含大小写和数字
-func (r *Rand) RandomString(n int) string {
+func (rr *Rand) RandomString(n int) string {
 	letters := []byte("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ123456789")
 	//var letters = []byte("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ123456789")
 	result := make([]byte, n)
-	rand.Seed(time.Now().Unix())
+	//rand.Seed(time.Now().Unix())
 	for i := range result {
 		result[i] = letters[rand.Intn(len(letters))]
 	}
@@ -21,11 +20,11 @@ func (r *Rand) RandomString(n int) string {
 }
 
 // 生成指定位数的数字字符串，第一位不为0
-func (r *Rand) RandomCode(n int) string {
+func (rr *Rand) RandomCode(n int) string {
 	numbers := []byte("0123456789")
 	numbers_no_zero := []byte("123456789")
 	result := make([]byte, n)
-	rand.Seed(time.Now().Unix())
+	//rand.Seed(time.Now().Unix())
 	//code := fmt.Sprintf("%06v", rand.New(rand.NewSource(time.Now().UnixNano())).Int31n(1000000))
 	for i := range result {
 		result[i] = numbers[rand.Intn(len(numbers))]
@@ -41,10 +40,10 @@ func (r *Rand) RandomCode(n int) string {
 }
 
 // 6位随机验证码
-func (r *Rand) GetNum6() string {
+func (rr *Rand) GetNum6() string {
 	//deltaNumber := exponent(10,6)
 	//baseNumber := exponent(10,7)
-	rand.Seed(time.Now().UnixNano())
+	//rand.Seed(time.Now().UnixNano())
 	code := rand.Intn(899999) + 100000
 	//code := rand.Intn(baseNumber-baseNumber-1) + deltaNumber
 	res := strconv.Itoa(code) //转字符串返回