}

    // Confirms equals() rejects null and different types
    @Test
    @DisplayName("equals: null or different type -> false")
    void equals_nullAndDifferentType_false() {
        // Arrange
        SecurityBlob a = new SecurityBlob(new byte[] { 1 });

        // Act & Assert
        assertFalse(a.equals(null), "equals(null) should be false");