diff --git a/api/@ohos.security.cert.d.ts b/api/@ohos.security.cert.d.ts
index 46327cf1317a8a65bd2ab361b3e9c4d9438ee565..53b0a41265d021c5e3b0e43487aba47195b6c895 100644
--- a/api/@ohos.security.cert.d.ts
+++ b/api/@ohos.security.cert.d.ts
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2022-2024 Huawei Device Co., Ltd.
+ * Copyright (c) 2022-2025 Huawei Device Co., Ltd.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
@@ -17,7 +17,7 @@
  * @file
  * @kit DeviceCertificateKit
  */
-import type { AsyncCallback } from './@ohos.base';
+import type { AsyncCallback, BusinessError } from './@ohos.base';
 import cryptoFramework from './@ohos.security.cryptoFramework';
 
 /**
@@ -1421,6 +1421,23 @@ declare namespace cert {
      */
     getIssuerName(): DataBlob;
 
+    /**
+     * Get X509 cert issuer name according to the encoding type.
+     *
+     * @param { EncodingType } encodingType indicates the encoding type.
+     * @returns { string } X509 cert issuer name.
+     * @throws { BusinessError } 401 - invalid parameters. Possible causes: 1. Incorrect parameter types;
+     * <br>2. Parameter verification failed.
+     * @throws { BusinessError } 19020001 - memory error.
+     * @throws { BusinessError } 19020002 - runtime error.
+     * @throws { BusinessError } 19030001 - crypto operation error.
+     * @syscap SystemCapability.Security.Cert
+     * @crossplatform
+     * @atomicservice
+     * @since 20
+     */
+    getIssuerName(encodingType: EncodingType): string;
+
     /**
      * Get X509 cert subject name.
      *
@@ -1965,6 +1982,23 @@ declare namespace cert {
      */
     toString(): string;
 
+    /**
+     * Get the string type data of the object according to the encoding type.
+     *
+     * @param { EncodingType } encodingType indicates the encoding type.
+     * @returns { string } the string type data of the object.
+     * @throws { BusinessError } 401 - invalid parameters. Possible causes: 1. Incorrect parameter types;
+     * <br>2. Parameter verification failed.
+     * @throws { BusinessError } 19020001 - memory error.
+     * @throws { BusinessError } 19020002 - runtime error.
+     * @throws { BusinessError } 19030001 - crypto operation error.
+     * @syscap SystemCapability.Security.Cert
+     * @crossplatform
+     * @atomicservice
+     * @since 20
+     */
+    toString(encodingType: EncodingType): string;
+
     /**
      * Get the hash value of DER format data.
      *
@@ -2598,6 +2632,24 @@ declare namespace cert {
      */
     getCertIssuer(): DataBlob;
 
+    /**
+     * Get the issuer name of the x509 certificate described by this entry according to the encoding type.
+     *
+     * @param { EncodingType } encodingType indicates the encoding type.
+     * @returns { string } issuer name.
+     * @throws { BusinessError } 401 - invalid parameters. Possible causes: 1. Incorrect parameter types;
+     * <br>2. Parameter verification failed.
+     * @throws { BusinessError } 801 - this operation is not supported.
+     * @throws { BusinessError } 19020001 - memory error.
+     * @throws { BusinessError } 19020002 - runtime error.
+     * @throws { BusinessError } 19030001 - crypto operation error.
+     * @syscap SystemCapability.Security.Cert
+     * @crossplatform
+     * @atomicservice
+     * @since 20
+     */
+    getCertIssuer(encodingType: EncodingType): string;
+
     /**
      * Get the revocation date from x509CRL entry.
      *
@@ -3266,6 +3318,23 @@ declare namespace cert {
      */
     getIssuerName(): DataBlob;
 
+    /**
+     * Get the issuer name from CRL according to the encoding type.
+     *
+     * @param { EncodingType } encodingType indicates the encoding type.
+     * @returns { string } issuer name of CRL.
+     * @throws { BusinessError } 401 - invalid parameters. Possible causes: 1. Incorrect parameter types;
+     * <br>2. Parameter verification failed.
+     * @throws { BusinessError } 19020001 - memory error.
+     * @throws { BusinessError } 19020002 - runtime error.
+     * @throws { BusinessError } 19030001 - crypto operation error.
+     * @syscap SystemCapability.Security.Cert
+     * @crossplatform
+     * @atomicservice
+     * @since 20
+     */
+    getIssuerName(encodingType: EncodingType): string;
+
     /**
      * Get lastUpdate value from CRL.
      *
@@ -3637,6 +3706,23 @@ declare namespace cert {
      */
     toString(): string;
 
+    /**
+     * Get the string type data of the object according to the encoding type.
+     *
+     * @param { EncodingType } encodingType indicates the encoding type.
+     * @returns { string } the string type data of the object.
+     * @throws { BusinessError } 401 - invalid parameters. Possible causes: 1. Incorrect parameter types;
+     * <br>2. Parameter verification failed.
+     * @throws { BusinessError } 19020001 - memory error.
+     * @throws { BusinessError } 19020002 - runtime error.
+     * @throws { BusinessError } 19030001 - crypto operation error.
+     * @syscap SystemCapability.Security.Cert
+     * @crossplatform
+     * @atomicservice
+     * @since 20
+     */
+    toString(encodingType: EncodingType): string;
+
     /**
      * Get the hash value of DER format data.
      *
@@ -5234,7 +5320,7 @@ declare namespace cert {
    */
   interface X500DistinguishedName {
     /**
-     * Get distinguished name string.
+     * Get distinguished name string in ASCII encoding type.
      *
      * @returns { string } distinguished name string.
      * @throws { BusinessError } 19020001 - memory error.
@@ -5247,6 +5333,23 @@ declare namespace cert {
      */
     getName(): string;
 
+    /**
+     * Get distinguished name string according to the encoding type.
+     *
+     * @param { EncodingType } encodingType - the specified encoding type.
+     * @returns { string } distinguished name string.
+     * @throws { BusinessError } 401 - invalid parameters. Possible causes: 1. Incorrect parameter types;
+     * <br>2. Parameter verification failed.
+     * @throws { BusinessError } 19020001 - memory error.
+     * @throws { BusinessError } 19020002 - runtime error.
+     * @throws { BusinessError } 19030001 - crypto operation error.
+     * @syscap SystemCapability.Security.Cert
+     * @crossplatform
+     * @atomicservice
+     * @since 20
+     */
+    getName(encodingType: EncodingType): string;
+
     /**
      * Get distinguished name string by type.
      *