diff --git a/src/tests/test_seed_prompt.py b/src/tests/test_seed_prompt.py
index 3711cd4..163b7ff 100644
--- a/src/tests/test_seed_prompt.py
+++ b/src/tests/test_seed_prompt.py
@@ -1,4 +1,5 @@
 import types
+import pytest
 from utils import seed_prompt
 
 
@@ -46,6 +47,37 @@ def test_masked_input_windows_space(monkeypatch, capsys):
     assert out.count("*") == 4
 
 
+def test_masked_input_posix_ctrl_c(monkeypatch):
+    seq = iter(["\x03"])
+    monkeypatch.setattr(seed_prompt.sys.stdin, "read", lambda n=1: next(seq))
+    monkeypatch.setattr(seed_prompt.sys.stdin, "fileno", lambda: 0)
+
+    calls: list[tuple[str, int]] = []
+    fake_termios = types.SimpleNamespace(
+        tcgetattr=lambda fd: "old",
+        tcsetattr=lambda fd, *_: calls.append(("tcsetattr", fd)),
+        TCSADRAIN=1,
+    )
+    fake_tty = types.SimpleNamespace(setraw=lambda fd: calls.append(("setraw", fd)))
+    monkeypatch.setattr(seed_prompt, "termios", fake_termios)
+    monkeypatch.setattr(seed_prompt, "tty", fake_tty)
+    monkeypatch.setattr(seed_prompt.sys, "platform", "linux", raising=False)
+
+    with pytest.raises(KeyboardInterrupt):
+        seed_prompt.masked_input("Enter: ")
+    assert calls == [("setraw", 0), ("tcsetattr", 0)]
+
+
+def test_masked_input_windows_ctrl_c(monkeypatch):
+    seq = iter(["\x03"])
+    fake_msvcrt = types.SimpleNamespace(getwch=lambda: next(seq))
+    monkeypatch.setattr(seed_prompt, "msvcrt", fake_msvcrt)
+    monkeypatch.setattr(seed_prompt.sys, "platform", "win32", raising=False)
+
+    with pytest.raises(KeyboardInterrupt):
+        seed_prompt.masked_input("Password: ")
+
+
 def test_prompt_seed_words_valid(monkeypatch):
     from mnemonic import Mnemonic
 
diff --git a/src/utils/seed_prompt.py b/src/utils/seed_prompt.py
index 7ff0130..7511488 100644
--- a/src/utils/seed_prompt.py
+++ b/src/utils/seed_prompt.py
@@ -58,6 +58,8 @@ def _masked_input_windows(prompt: str) -> str:
     buffer: list[str] = []
     while True:
         ch = msvcrt.getwch()
+        if ch == "\x03":
+            raise KeyboardInterrupt
         if ch in ("\r", "\n"):
             sys.stdout.write("\n")
             return "".join(buffer)
@@ -85,6 +87,8 @@ def _masked_input_posix(prompt: str) -> str:
         tty.setraw(fd)
         while True:
             ch = sys.stdin.read(1)
+            if ch == "\x03":
+                raise KeyboardInterrupt
             if ch in ("\r", "\n"):
                 sys.stdout.write("\n")
                 return "".join(buffer)
@@ -105,6 +109,8 @@ def masked_input(prompt: str) -> str:
     func = _masked_input_windows if sys.platform == "win32" else _masked_input_posix
     try:
         return func(prompt)
+    except KeyboardInterrupt:
+        raise
     except Exception:  # pragma: no cover - fallback when TTY operations fail
         return input(prompt)