diff --git a/src/error.rs b/src/error.rs
index b4b8cf4..3151807 100644
--- a/src/error.rs
+++ b/src/error.rs
@@ -18,6 +18,8 @@ pub enum Error {
 	ParsingEncodedDataInvalidIkmId(Vec<u8>),
 	#[error("parsing error: encoded data: invalid IKM length{0}")]
 	ParsingEncodedDataInvalidIkmLen(usize),
+	#[error("parsing error: encoded data: invalid IKM list id: {0:?}")]
+	ParsingEncodedDataInvalidIkmListId(Vec<u8>),
 	#[error("parsing error: encoded data: invalid IKM list length{0}")]
 	ParsingEncodedDataInvalidIkmListLen(usize),
 	#[error("parsing error: encoded data: invalid number of parts: got {1} instead of {0}")]
diff --git a/src/storage.rs b/src/storage.rs
index e2f21bb..83356a4 100644
--- a/src/storage.rs
+++ b/src/storage.rs
@@ -53,6 +53,9 @@ pub(crate) fn decode_ikm_list(data: &str) -> Result<InputKeyMaterialList> {
 		return Err(Error::ParsingEncodedDataInvalidIkmListLen(v.len()));
 	}
 	let id_data = decode_data(v[0])?;
+	if id_data.len() != 4 {
+		return Err(Error::ParsingEncodedDataInvalidIkmListId(id_data));
+	}
 	let id_counter = CounterId::from_le_bytes(id_data[0..4].try_into().unwrap());
 	let mut ikm_lst = Vec::with_capacity(v.len() - 1);
 	for ikm_str in &v[1..] {