diff --git a/packages/crypto/src/index.ts b/packages/crypto/src/index.ts
index e3ea7e0..b8bd01b 100644
--- a/packages/crypto/src/index.ts
+++ b/packages/crypto/src/index.ts
@@ -2,5 +2,5 @@ export { aesGcmDecrypt, aesGcmEncrypt } from './aes-gcm'
 export { sha256, sha256Hex } from './hash'
 export { hkdfSha256 } from './hkdf'
 export { hmacSha256, hmacSha256Base64 } from './hmac'
-export { generatePgpKeyPair, pgpSignDetached, pgpVerifyDetached } from './pgp'
+export { generatePgpKeyPair, pgpSignDetached, pgpVerifyDetached, validatePgpPrivateKey } from './pgp'
 export { rsaOaepEncrypt } from './rsa-oaep'
diff --git a/packages/crypto/src/pgp.ts b/packages/crypto/src/pgp.ts
index d809647..28411d0 100644
--- a/packages/crypto/src/pgp.ts
+++ b/packages/crypto/src/pgp.ts
@@ -28,6 +28,10 @@ export const generatePgpKeyPair = async (
  * @param armoredPrivateKey - ASCII-armored private key
  * @returns ASCII-armored detached signature (signature.asc content)
  */
+export const validatePgpPrivateKey = async (armoredKey: string): Promise<void> => {
+  await openpgp.readPrivateKey({ armoredKey })
+}
+
 export const pgpSignDetached = async (data: Uint8Array, armoredPrivateKey: string): Promise<string> => {
   const privateKey = await openpgp.readPrivateKey({ armoredKey: armoredPrivateKey })
   const message = await openpgp.createMessage({ binary: data })