diff --git a/packages/backend/src/misc/gen-id.ts b/packages/backend/src/misc/gen-id.ts
index fb92dd808c..c9e52c8295 100644
--- a/packages/backend/src/misc/gen-id.ts
+++ b/packages/backend/src/misc/gen-id.ts
@@ -1,14 +1,9 @@
-import { init, createId } from "@paralleldrive/cuid2";
 import config from "@/config/index.js";
+import { nativeCreateId, nativeInitIdGenerator } from "native-utils/built";
 
-const TIME2000 = 946684800000;
-const TIMESTAMP_LENGTH = 8;
-
-const length =
-	Math.min(Math.max(config.cuid?.length ?? 16, 16), 24) - TIMESTAMP_LENGTH;
-const fingerprint = `${config.cuid?.fingerprint ?? ""}${createId()}`;
-
-const genCuid2 = init({ length, fingerprint });
+const length = Math.min(Math.max(config.cuid?.length ?? 16, 16), 24);
+const fingerprint = config.cuid?.fingerprint ?? "";
+nativeInitIdGenerator(length, fingerprint);
 
 /**
  * The generated ID results in the form of `[8 chars timestamp] + [cuid2]`.
@@ -19,9 +14,5 @@ const genCuid2 = init({ length, fingerprint });
  * Ref: https://github.com/paralleldrive/cuid2#parameterized-length
  */
 export function genId(date?: Date): string {
-	const now = (date ?? new Date()).getTime();
-	const time = Math.max(now - TIME2000, 0);
-	const timestamp = time.toString(36).padStart(TIMESTAMP_LENGTH, "0");
-
-	return `${timestamp}${genCuid2()}`;
+	return nativeCreateId(BigInt((date ?? new Date()).getTime()));
 }
diff --git a/packages/backend/src/misc/secure-rndstr.ts b/packages/backend/src/misc/secure-rndstr.ts
index 7f5754e1c5..4f4c9884ae 100644
--- a/packages/backend/src/misc/secure-rndstr.ts
+++ b/packages/backend/src/misc/secure-rndstr.ts
@@ -1,24 +1,5 @@
-import * as crypto from "node:crypto";
+import { nativeRandomStr } from "native-utils/built";
 
-const L_CHARS = "0123456789abcdefghijklmnopqrstuvwxyz";
-const LU_CHARS =
-	"0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
-
-export function secureRndstr(length = 32, useLU = true): string {
-	const chars = useLU ? LU_CHARS : L_CHARS;
-	const chars_len = chars.length;
-
-	let str = "";
-
-	for (let i = 0; i < length; i++) {
-		let rand = Math.floor(
-			(crypto.randomBytes(1).readUInt8(0) / 0xff) * chars_len,
-		);
-		if (rand === chars_len) {
-			rand = chars_len - 1;
-		}
-		str += chars.charAt(rand);
-	}
-
-	return str;
+export function secureRndstr(length = 32, _ = true): string {
+	return nativeRandomStr(length);
 }