diff --git a/.nvmrc b/.nvmrc
new file mode 100644
index 0000000..53d1c14
--- /dev/null
+++ b/.nvmrc
@@ -0,0 +1 @@
+v22
diff --git a/AGENTS.md b/AGENTS.md
index 4ebfbb4..3a11552 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -15,6 +15,8 @@
 
 ## Build, Test, and Development Commands
 
+- **Node version requirement**: Before running `pnpm` commands (especially checks/tests), run `nvm use v22` in this repository.
+
 - `pnpm dev` – start the Next.js development server with hot reload.
 - `pnpm build` – create a production build.
 - `pnpm start` – run the production bundle locally.
diff --git a/components/access-keys/new-item.tsx b/components/access-keys/new-item.tsx
index 0a8d403..7de2f90 100644
--- a/components/access-keys/new-item.tsx
+++ b/components/access-keys/new-item.tsx
@@ -47,8 +47,14 @@ export function AccessKeysNewItem({ visible, onVisibleChange, onSuccess, onNotic
 
   React.useEffect(() => {
     if (visible) {
-      setAccessKey(makeRandomString(20))
-      setSecretKey(makeRandomString(40))
+      try {
+        setAccessKey(makeRandomString(20))
+        setSecretKey(makeRandomString(40))
+      } catch {
+        setAccessKey("")
+        setSecretKey("")
+        message.error(t("Failed to generate secure random keys"))
+      }
       setName("")
       setDescription("")
       setExpiry(null)
@@ -63,7 +69,7 @@ export function AccessKeysNewItem({ visible, onVisibleChange, onSuccess, onNotic
           setPolicy("{}")
         })
     }
-  }, [visible, api])
+  }, [visible, api, message, t])
 
   const closeModal = () => {
     onVisibleChange(false)
diff --git a/lib/delete-task.ts b/lib/delete-task.ts
index 804a226..0f249a0 100644
--- a/lib/delete-task.ts
+++ b/lib/delete-task.ts
@@ -1,5 +1,6 @@
 import { DeleteObjectCommand, DeleteObjectsCommand, ListObjectsV2Command, ListObjectVersionsCommand, S3Client } from "@aws-sdk/client-s3"
 import type { ManagedTask, TaskHandler, TaskLifecycleStatus } from "./task-manager"
+import { createTaskId } from "./task-id"
 
 export type DeleteStatus = "pending" | "running" | "completed" | "failed" | "canceled"
 
@@ -203,7 +204,7 @@ export function createDeleteTaskHelpers(s3Client: S3Client, config: DeleteTaskCo
     prefix?: string,
   ): DeleteTask[] =>
     items.map((item) => ({
-      id: `${Date.now()}-${Math.random().toString(36).slice(2, 11)}-${item.key}-${item.versionId ?? "latest"}`,
+      id: createTaskId(`${item.key}-${item.versionId ?? "latest"}`),
       kind: "delete" as const,
       key: item.key,
       versionId: item.versionId,
@@ -244,7 +245,7 @@ export function createDeleteTaskHelpers(s3Client: S3Client, config: DeleteTaskCo
     bucketName: string,
     options?: { forceDelete?: boolean },
   ): FolderDeleteTask => ({
-    id: `${Date.now()}-${Math.random().toString(36).slice(2, 11)}-${prefix}`,
+    id: createTaskId(prefix),
     kind: "delete-folder" as const,
     bucketName,
     prefix,
diff --git a/lib/functions.ts b/lib/functions.ts
index 7a16423..85fdf32 100644
--- a/lib/functions.ts
+++ b/lib/functions.ts
@@ -33,19 +33,26 @@ function convertToBytes(value: string, unit: string, fromK8s = false): number {
 }
 
 export function makeRandomString(length = 20): string {
-  let initstr = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890"
-  const arr = initstr.split("")
+  const alphabet = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890"
+  if (length <= 0) return ""
 
-  for (let i = arr.length - 1; i > 0; i--) {
-    const j = Math.floor(Math.random() * (i + 1))
-    const current = arr[i]
-    const swapWith = arr[j]
-    if (current !== undefined && swapWith !== undefined) {
-      arr[i] = swapWith
-      arr[j] = current
+  const cryptoApi = globalThis.crypto
+  if (!cryptoApi?.getRandomValues) {
+    throw new Error("Secure random generator is not available")
+  }
+
+  const result: string[] = []
+  const alphabetLength = alphabet.length
+  const maxByte = 256 - (256 % alphabetLength)
+
+  while (result.length < length) {
+    const bytes = cryptoApi.getRandomValues(new Uint8Array(length))
+    for (const byte of bytes) {
+      if (byte >= maxByte) continue
+      result.push(alphabet[byte % alphabetLength] ?? "")
+      if (result.length === length) break
     }
   }
 
-  initstr = arr.join("")
-  return initstr.slice(0, length)
+  return result.join("")
 }
diff --git a/lib/task-id.ts b/lib/task-id.ts
new file mode 100644
index 0000000..3ddc0ad
--- /dev/null
+++ b/lib/task-id.ts
@@ -0,0 +1,35 @@
+const FALLBACK_ALPHABET = "0123456789abcdefghijklmnopqrstuvwxyz"
+
+function createSecureSuffix(length = 12): string {
+  const cryptoApi = globalThis.crypto
+  if (!cryptoApi?.getRandomValues) {
+    throw new Error("Secure random generator is not available")
+  }
+
+  const chars: string[] = []
+  const alphabetLength = FALLBACK_ALPHABET.length
+  const maxByte = 256 - (256 % alphabetLength)
+
+  while (chars.length < length) {
+    const bytes = cryptoApi.getRandomValues(new Uint8Array(length))
+    for (const byte of bytes) {
+      if (byte >= maxByte) continue
+      chars.push(FALLBACK_ALPHABET[byte % alphabetLength] ?? "")
+      if (chars.length === length) break
+    }
+  }
+
+  return chars.join("")
+}
+
+export function createTaskId(seed: string): string {
+  const prefix = Date.now()
+  const cryptoApi = globalThis.crypto
+
+  if (cryptoApi?.randomUUID) {
+    return `${prefix}-${cryptoApi.randomUUID()}-${seed}`
+  }
+
+  return `${prefix}-${createSecureSuffix()}-${seed}`
+}
+
diff --git a/lib/upload-task.ts b/lib/upload-task.ts
index 38386ff..1efb698 100644
--- a/lib/upload-task.ts
+++ b/lib/upload-task.ts
@@ -7,6 +7,7 @@ import {
 } from "@aws-sdk/client-s3"
 import type { ManagedTask, TaskHandler, TaskLifecycleStatus } from "./task-manager"
 import { formatBytes } from "./functions"
+import { createTaskId } from "./task-id"
 
 export type UploadStatus = "pending" | "running" | "completed" | "failed" | "canceled" | "paused"
 
@@ -105,7 +106,7 @@ export function createUploadTaskHelpers(s3Client: S3Client, config: UploadTaskCo
         existKeys.add(`${bucketName}/${item.key}`)
         const displayName = item.key.split("/").pop() ?? item.key
         return {
-          id: `${Date.now()}-${Math.random().toString(36).slice(2, 11)}-${item.key}`,
+          id: createTaskId(item.key),
           kind: "upload" as const,
           file: item.file,
           key: item.key,