diff --git a/remote_judger/src/interface.ts b/remote_judger/src/interface.ts
index 3b8f1b6..02a4f42 100644
--- a/remote_judger/src/interface.ts
+++ b/remote_judger/src/interface.ts
@@ -19,6 +19,7 @@ export interface IBasicProvider {
     next: NextFunction,
     end: NextFunction
   ): Promise<string | void>;
+  ensureIsOwnSubmission(id: string): Promise<boolean | void>;
   waitForSubmission(
     id: string,
     next: NextFunction,
diff --git a/remote_judger/src/providers/atcoder.ts b/remote_judger/src/providers/atcoder.ts
index 0e64967..53317d7 100644
--- a/remote_judger/src/providers/atcoder.ts
+++ b/remote_judger/src/providers/atcoder.ts
@@ -244,6 +244,10 @@ export default class AtcoderProvider implements IBasicProvider {
       .getAttribute('data-id');
   }
 
+  async ensureIsOwnSubmission(id: string) {
+    throw new Error('Method not implemented.');
+  }
+
   async waitForSubmission(id: string, next, end, problem_id: string) {
     let count = 0;
     let fail = 0;
diff --git a/remote_judger/src/providers/codeforces.ts b/remote_judger/src/providers/codeforces.ts
index fd0d549..eb17728 100644
--- a/remote_judger/src/providers/codeforces.ts
+++ b/remote_judger/src/providers/codeforces.ts
@@ -344,6 +344,10 @@ export default class CodeforcesProvider implements IBasicProvider {
       .getAttribute('data-submission-id');
   }
 
+  async ensureIsOwnSubmission(id: string) {
+    throw new Error('Method not implemented.');
+  }
+
   async waitForSubmission(id: string, next, end) {
     let count = 0;
     let fail = 0;
diff --git a/remote_judger/src/providers/luogu.ts b/remote_judger/src/providers/luogu.ts
index e20e8c1..f7e5e93 100644
--- a/remote_judger/src/providers/luogu.ts
+++ b/remote_judger/src/providers/luogu.ts
@@ -250,7 +250,26 @@ export default class LuoguProvider implements IBasicProvider {
     return result.body.rid;
   }
 
-  async waitForSubmission(id: string, next, end) {
+  async ensureIsOwnSubmission(id: string) {
+    const { body } = await this.safeGet(`/record/${id}?_contentOnly=1`);
+
+    const current_uid = body.currentUser?.uid;
+    const submission_uid = body.currentData.record?.user.uid;
+
+    return current_uid && submission_uid && current_uid === submission_uid;
+  }
+
+  async waitForSubmission(id: string, next, end, problem_id: string) {
+    if (!(await this.ensureLogin())) {
+      await end({
+        error: true,
+        status: 'Judgment Failed',
+        message: 'Login failed',
+      });
+
+      return null;
+    }
+
     let fail = 0;
     let count = 0;
 
@@ -262,6 +281,24 @@ export default class LuoguProvider implements IBasicProvider {
         const { body } = await this.safeGet(`/record/${id}?_contentOnly=1`);
         const data = body.currentData.record;
 
+        if (!data) {
+          return await end({
+            error: true,
+            id: `R${id}`,
+            status: 'Judgment Failed',
+            message: 'Failed to fetch submission details.',
+          });
+        }
+
+        if (data.problem.pid != problem_id) {
+          return await end({
+            id,
+            error: true,
+            status: 'Judgment Failed',
+            message: 'Submission does not match current problem.',
+          });
+        }
+
         if (
           data.detail.compileResult &&
           data.detail.compileResult.success === false
diff --git a/remote_judger/src/providers/uoj.ts b/remote_judger/src/providers/uoj.ts
index 63ce1f3..ee54086 100644
--- a/remote_judger/src/providers/uoj.ts
+++ b/remote_judger/src/providers/uoj.ts
@@ -206,6 +206,10 @@ export default class UOJProvider implements IBasicProvider {
       .innerHTML.split('#')[1];
   }
 
+  async ensureIsOwnSubmission(id: string) {
+    throw new Error('Method not implemented.');
+  }
+
   async waitForSubmission(id: string, next, end) {
     let count = 0;
     let fail = 0;
diff --git a/web/app/models/UOJRemoteProblem.php b/web/app/models/UOJRemoteProblem.php
index c5addc2..fc9f278 100644
--- a/web/app/models/UOJRemoteProblem.php
+++ b/web/app/models/UOJRemoteProblem.php
@@ -49,7 +49,7 @@ class UOJRemoteProblem {
 			'short_name' => '洛谷',
 			'url' => 'https://www.luogu.com.cn',
 			'languages' => ['C', 'C++98', 'C++11', 'C++', 'C++17', 'C++20', 'Python3', 'Java8', 'Pascal'],
-			'submit_type' => ['my'],
+			'submit_type' => ['my', 'archive'],
 		],
 	];