diff --git a/rust/pv/src/uvsecret/asrcb.rs b/rust/pv/src/uvsecret/asrcb.rs
index f3516a26..73371889 100644
--- a/rust/pv/src/uvsecret/asrcb.rs
+++ b/rust/pv/src/uvsecret/asrcb.rs
@@ -528,3 +528,84 @@ impl Request for AddSecretRequest {
         Ok(())
     }
 }
+
+#[cfg(test)]
+mod test {
+    use super::*;
+    use crate::request::SeHdrVersion;
+
+    #[test]
+    fn add_secret_version_v1() {
+        // Test V1 version constant
+        assert_eq!(AddSecretVersion::One as u32, 0x0100);
+    }
+
+    #[test]
+    fn add_secret_version_v2() {
+        // Test V2 version constant
+        assert_eq!(AddSecretVersion::Two as u32, 0x0200);
+    }
+
+    #[test]
+    fn add_secret_version_conversion_v1() {
+        // Test conversion from SeHdrVersion to AddSecretVersion for V1
+        let v1: AddSecretVersion = SeHdrVersion::One.into();
+        assert_eq!(v1, AddSecretVersion::One);
+    }
+
+    #[test]
+    fn add_secret_version_conversion_v2() {
+        // Test conversion from SeHdrVersion to AddSecretVersion for V2
+        let v2: AddSecretVersion = SeHdrVersion::Two.into();
+        assert_eq!(v2, AddSecretVersion::Two);
+    }
+
+    #[test]
+    fn add_secret_version_into_request_version() {
+        // Test conversion from AddSecretVersion to RequestVersion
+        let v1: RequestVersion = AddSecretVersion::One.into();
+        assert_eq!(v1, 0x0100);
+
+        let v2: RequestVersion = AddSecretVersion::Two.into();
+        assert_eq!(v2, 0x0200);
+    }
+
+    #[test]
+    fn add_secret_flags_default() {
+        // Test default flags have no bits set
+        let flags = AddSecretFlags::default();
+        let uv_flags: UvFlags = flags.into();
+
+        // Default should have all bits cleared
+        assert_eq!(uv_flags.as_bytes(), &[0u8; 8]);
+    }
+
+    #[test]
+    fn add_secret_flags_disable_dump() {
+        // Test disable dump flag sets bit 0
+        let mut flags = AddSecretFlags::default();
+        flags.set_disable_dump();
+
+        let uv_flags: UvFlags = flags.into();
+
+        // Bit 0 should be set, so bytes should not be all zeros
+        assert_ne!(uv_flags.as_bytes(), &[0u8; 8]);
+    }
+
+    #[test]
+    fn req_auth_data_size() {
+        // Test ReqAuthData size constant
+        use std::mem::size_of;
+
+        assert_eq!(size_of::<ReqAuthDataV1>(), 0x1e8);
+    }
+
+    #[test]
+    #[cfg(any(debug_assertions, test))]
+    fn add_secret_version_inv_for_testing() {
+        // Test that invalid version exists for testing
+        assert_eq!(AddSecretVersion::Inv as u32, 0);
+        assert_ne!(AddSecretVersion::Inv, AddSecretVersion::One);
+        assert_ne!(AddSecretVersion::Inv, AddSecretVersion::Two);
+    }
+}
diff --git a/rust/pv/tests/add_secret_request.rs b/rust/pv/tests/add_secret_request.rs
index b8dd2097..f24f663e 100644
--- a/rust/pv/tests/add_secret_request.rs
+++ b/rust/pv/tests/add_secret_request.rs
@@ -305,3 +305,164 @@ fn verify_no_user_data() {
         Ok(None)
     ))
 }
+
+// V2 tests (using hybrid keys)
+
+#[test]
+fn null_none_default_ncuid_two_user_unsgn() {
+    let _guard = DeterministicTestRandGuard::install(&[0x42; 4096], &[0x11; 32]).unwrap();
+    let user_data_orig = vec![0x56; 0x183];
+    let (host_key, ctx) = get_crypto_v2();
+    let mut asrcb =
+        AddSecretRequest::new(AddSecretVersion::Two, GuestSecret::Null, TAGS, no_flag())
+            .expect("AddSecretRequest::new failed");
+
+    asrcb.add_hostkey(host_key).unwrap();
+    asrcb.set_user_data(user_data_orig.clone(), None).unwrap();
+    let asrcb = asrcb.encrypt(&ctx).unwrap();
+
+    let user_data = verify_asrcb_and_get_user_data(asrcb, None).unwrap();
+
+    assert_eq!(
+        user_data_orig.as_slice(),
+        &user_data.as_ref().unwrap()[..user_data_orig.len()]
+    );
+}
+
+#[test]
+fn null_none_default_ncuid_two_user_ec() {
+    let _guard = DeterministicTestRandGuard::install(&[0x42; 4096], &[0x11; 32]).unwrap();
+    let (usr_sgn_key, _) = get_test_keys();
+
+    let usr_vrfy_key = usr_sgn_key.ec_key().unwrap();
+    let usr_vrfy_key = usr_vrfy_key.public_key();
+    let usr_vrfy_key = PKey::from_ec_key(
+        EcKey::from_public_key(
+            &EcGroup::from_curve_name(Nid::SECP521R1).unwrap(),
+            usr_vrfy_key,
+        )
+        .unwrap(),
+    )
+    .unwrap();
+
+    let user_data_orig = vec![0x56; 0x100];
+    let asrcb = create_signed_asrcb_v2(usr_sgn_key, user_data_orig.clone());
+
+    let user_data = verify_asrcb_and_get_user_data(asrcb, Some(usr_vrfy_key)).unwrap();
+    assert_eq!(
+        user_data_orig.as_slice(),
+        &user_data.as_ref().unwrap()[..user_data_orig.len()]
+    );
+}
+
+#[test]
+fn null_none_default_ncuid_two_user_rsa2048() {
+    let _guard = DeterministicTestRandGuard::install(&[0x42; 4096], &[0x11; 32]).unwrap();
+    let usr_sgn_key = get_test_asset!("keys/rsa2048key.pem");
+    let usr_sgn_key = PKey::private_key_from_pem(usr_sgn_key).unwrap();
+    let user_data_orig = vec![0x56; 0x100];
+    let asrcb = create_signed_asrcb_v2(usr_sgn_key, user_data_orig.clone());
+
+    let usr_vrfy_key = get_test_asset!("keys/rsa2048key.pub.pem");
+    let usr_vrfy_key = PKey::public_key_from_pem(usr_vrfy_key).unwrap();
+
+    let user_data = verify_asrcb_and_get_user_data(asrcb, Some(usr_vrfy_key)).unwrap();
+    assert_eq!(
+        user_data_orig.as_slice(),
+        &user_data.as_ref().unwrap()[..user_data_orig.len()]
+    );
+}
+
+#[test]
+fn null_none_default_ncuid_two_user_rsa3072() {
+    let _guard = DeterministicTestRandGuard::install(&[0x42; 4096], &[0x11; 32]).unwrap();
+    let usr_sgn_key = get_test_asset!("keys/rsa3072key.pem");
+    let usr_sgn_key = PKey::private_key_from_pem(usr_sgn_key).unwrap();
+    let user_data_orig = vec![0x56; 0x80];
+    let asrcb = create_signed_asrcb_v2(usr_sgn_key, user_data_orig.clone());
+
+    let usr_vrfy_key = get_test_asset!("keys/rsa3072key.pub.pem");
+    let usr_vrfy_key = PKey::public_key_from_pem(usr_vrfy_key).unwrap();
+
+    let user_data = verify_asrcb_and_get_user_data(asrcb, Some(usr_vrfy_key)).unwrap();
+    assert_eq!(
+        user_data_orig.as_slice(),
+        &user_data.as_ref().unwrap()[..user_data_orig.len()]
+    );
+}
+
+#[test]
+fn null_none_default_cuid_two() {
+    let _guard = DeterministicTestRandGuard::install(&[0x42; 4096], &[0x11; 32]).unwrap();
+    let asrcb = gen_asrcb_v2(GuestSecret::Null, None, no_flag(), true).unwrap();
+    let exp = get_test_asset!("exp/asrcb/null_none_default_cuid_two");
+    assert_eq!(asrcb, exp);
+}
+
+#[test]
+fn assoc_none_default_cuid_two() {
+    let asrcb = gen_asrcb_v2(association(), None, no_flag(), true).unwrap();
+    let exp = get_test_asset!("exp/asrcb/assoc_none_default_cuid_two");
+    assert_eq!(asrcb, exp);
+}
+
+#[test]
+fn null_simple_default_cuid_two() {
+    let asrcb = gen_asrcb_v2(GuestSecret::Null, ext_simple(), no_flag(), true).unwrap();
+    let exp = get_test_asset!("exp/asrcb/null_simple_default_cuid_two");
+    assert_eq!(asrcb, exp);
+}
+
+#[test]
+fn assoc_simple_default_cuid_two() {
+    let asrcb = gen_asrcb_v2(association(), ext_simple(), no_flag(), true).unwrap();
+    let exp = get_test_asset!("exp/asrcb/assoc_simple_default_cuid_two");
+    assert_eq!(asrcb, exp);
+}
+
+#[test]
+fn null_derived_default_cuid_two() {
+    let asrcb = gen_asrcb_v2(GuestSecret::Null, ext_derived(), no_flag(), true).unwrap();
+    let exp = get_test_asset!("exp/asrcb/null_derived_default_cuid_two");
+    assert_eq!(asrcb, exp);
+}
+
+#[test]
+fn assoc_derived_default_cuid_two() {
+    let asrcb = gen_asrcb_v2(association(), ext_derived(), no_flag(), true).unwrap();
+    let exp = get_test_asset!("exp/asrcb/assoc_derived_default_cuid_two");
+    assert_eq!(asrcb, exp);
+}
+
+#[test]
+fn null_none_dump_cuid_two() {
+    let mut flags = no_flag();
+    flags.set_disable_dump();
+    let asrcb = gen_asrcb_v2(GuestSecret::Null, None, flags, true).unwrap();
+    let exp = get_test_asset!("exp/asrcb/null_none_dump_cuid_two");
+    assert_eq!(asrcb, exp);
+}
+
+#[test]
+fn null_none_default_ncuid_two() {
+    let asrcb = gen_asrcb_v2(GuestSecret::Null, None, no_flag(), false).unwrap();
+    let exp = get_test_asset!("exp/asrcb/null_none_default_ncuid_two");
+    assert_eq!(asrcb, exp);
+}
+
+#[test]
+fn null_none_default_cuid_seven_two() {
+    let _guard = DeterministicTestRandGuard::install(&[0x42; 4096], &[0x11; 32]).unwrap();
+    let (hkd, ctx) = get_crypto_v2();
+    let mut asrcb =
+        AddSecretRequest::new(AddSecretVersion::Two, GuestSecret::Null, TAGS, no_flag())
+            .expect("AddSecretRequest::new failed");
+    for _ in 0..7 {
+        asrcb.add_hostkey(hkd.clone()).unwrap()
+    }
+    asrcb.set_cuid(CUID);
+    let asrcb = asrcb.encrypt(&ctx).unwrap();
+
+    let exp = get_test_asset!("exp/asrcb/null_none_default_cuid_seven_two");
+    assert_eq!(asrcb, exp);
+}
diff --git a/rust/pv/tests/assets/exp/asrcb/assoc_derived_default_cuid_two b/rust/pv/tests/assets/exp/asrcb/assoc_derived_default_cuid_two
new file mode 100644
index 00000000..4c7dd9e4
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diff --git a/rust/pv/tests/assets/exp/asrcb/assoc_none_default_cuid_two b/rust/pv/tests/assets/exp/asrcb/assoc_none_default_cuid_two
new file mode 100644
index 00000000..5724758c
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diff --git a/rust/pv/tests/assets/exp/asrcb/assoc_simple_default_cuid_two b/rust/pv/tests/assets/exp/asrcb/assoc_simple_default_cuid_two
new file mode 100644
index 00000000..a4b8274f
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diff --git a/rust/pv/tests/assets/exp/asrcb/null_derived_default_cuid_two b/rust/pv/tests/assets/exp/asrcb/null_derived_default_cuid_two
new file mode 100644
index 00000000..19627584
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diff --git a/rust/pv/tests/assets/exp/asrcb/null_none_default_cuid_seven_two b/rust/pv/tests/assets/exp/asrcb/null_none_default_cuid_seven_two
new file mode 100644
index 00000000..af2d2a64
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diff --git a/rust/pv/tests/assets/exp/asrcb/null_none_default_cuid_two b/rust/pv/tests/assets/exp/asrcb/null_none_default_cuid_two
new file mode 100644
index 00000000..a5dd24c3
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diff --git a/rust/pv/tests/assets/exp/asrcb/null_none_default_ncuid_two b/rust/pv/tests/assets/exp/asrcb/null_none_default_ncuid_two
new file mode 100644
index 00000000..c6e4b41a
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diff --git a/rust/pv/tests/assets/exp/asrcb/null_none_dump_cuid_two b/rust/pv/tests/assets/exp/asrcb/null_none_dump_cuid_two
new file mode 100644
index 00000000..f3f1d380
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diff --git a/rust/pv/tests/assets/exp/asrcb/null_simple_default_cuid_two b/rust/pv/tests/assets/exp/asrcb/null_simple_default_cuid_two
new file mode 100644
index 00000000..3def47d0
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