diff --git a/Cargo.lock b/Cargo.lock
index ff6675ce4..9b6afc650 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2552,7 +2552,7 @@ dependencies = [
 [[package]]
 name = "zcash_note_encryption"
 version = "0.4.0"
-source = "git+https://github.com/QED-it/zcash_note_encryption?branch=zsa1#b8bd2a186fc04ec4f55b2db44df7374f03ab5725"
+source = "git+https://github.com/QED-it/zcash_note_encryption?branch=zsa1#58384553aab76b2ee6d6eb328cf2187fa824ec9a"
 dependencies = [
  "chacha20",
  "chacha20poly1305",
diff --git a/Cargo.toml b/Cargo.toml
index 53da31cb3..7b0389cdd 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -25,7 +25,7 @@ rustdoc-args = ["--cfg", "docsrs", "--html-in-header", "katex-header.html"]
 [dependencies]
 aes = "0.8"
 bitvec = "1"
-blake2b_simd = "=1.0.1" # Last version required rust 1.66
+blake2b_simd = "1"
 half = "=2.2.1" # Last version requires Rust 1.70
 ff = "0.13"
 fpe = "0.6"
diff --git a/src/note_encryption/compact_action.rs b/src/note_encryption/compact_action.rs
index 77fc768b8..d7494d1c8 100644
--- a/src/note_encryption/compact_action.rs
+++ b/src/note_encryption/compact_action.rs
@@ -2,7 +2,7 @@
 
 use std::fmt;
 
-use zcash_note_encryption_zsa::{EphemeralKeyBytes, ShieldedOutput};
+use zcash_note_encryption_zsa::{note_bytes::NoteBytes, EphemeralKeyBytes, ShieldedOutput};
 
 use crate::{
     action::Action,
@@ -25,7 +25,10 @@ impl<A, D: OrchardDomainCommon> ShieldedOutput<OrchardDomain<D>> for Action<A, D
     }
 
     fn enc_ciphertext_compact(&self) -> D::CompactNoteCiphertextBytes {
-        self.encrypted_note().enc_ciphertext.as_ref()[..D::COMPACT_NOTE_SIZE].into()
+        D::CompactNoteCiphertextBytes::from_slice(
+            &self.encrypted_note().enc_ciphertext.as_ref()[..D::COMPACT_NOTE_SIZE],
+        )
+        .unwrap()
     }
 }
 
@@ -71,7 +74,7 @@ impl<D: OrchardDomainCommon> ShieldedOutput<OrchardDomain<D>> for CompactAction<
     }
 
     fn enc_ciphertext_compact(&self) -> D::CompactNoteCiphertextBytes {
-        self.enc_ciphertext
+        D::CompactNoteCiphertextBytes::from_slice(self.enc_ciphertext.as_ref()).unwrap()
     }
 }
 
@@ -112,7 +115,7 @@ impl<D: OrchardDomainCommon> CompactAction<D> {
 pub mod testing {
     use rand::RngCore;
 
-    use zcash_note_encryption_zsa::{Domain, NoteEncryption};
+    use zcash_note_encryption_zsa::{note_bytes::NoteBytes, Domain, NoteEncryption, MEMO_SIZE};
 
     use crate::{
         address::Address,
@@ -145,7 +148,7 @@ pub mod testing {
             }
         };
         let note = Note::from_parts(recipient, value, AssetBase::native(), rho, rseed).unwrap();
-        let encryptor = NoteEncryption::<OrchardDomain<D>>::new(ovk, note, [0u8; 512]);
+        let encryptor = NoteEncryption::<OrchardDomain<D>>::new(ovk, note, [0u8; MEMO_SIZE]);
         let cmx = ExtractedNoteCommitment::from(note.commitment());
         let ephemeral_key = OrchardDomain::<D>::epk_bytes(encryptor.epk());
         let enc_ciphertext = encryptor.encrypt_note_plaintext();
@@ -155,7 +158,10 @@ pub mod testing {
                 nullifier: nf_old,
                 cmx,
                 ephemeral_key,
-                enc_ciphertext: enc_ciphertext.as_ref()[..52].try_into().unwrap(),
+                enc_ciphertext: D::CompactNoteCiphertextBytes::from_slice(
+                    &enc_ciphertext.as_ref()[..D::COMPACT_NOTE_SIZE],
+                )
+                .unwrap(),
             },
             note,
         )
diff --git a/src/note_encryption/domain.rs b/src/note_encryption/domain.rs
index c91ad81b4..ec6dc8ad3 100644
--- a/src/note_encryption/domain.rs
+++ b/src/note_encryption/domain.rs
@@ -7,8 +7,8 @@ use group::ff::PrimeField;
 use blake2b_simd::Params;
 
 use zcash_note_encryption_zsa::{
-    BatchDomain, Domain, EphemeralKeyBytes, OutPlaintextBytes, OutgoingCipherKey, MEMO_SIZE,
-    OUT_PLAINTEXT_SIZE,
+    note_bytes::NoteBytes, BatchDomain, Domain, EphemeralKeyBytes, OutPlaintextBytes,
+    OutgoingCipherKey, MEMO_SIZE, OUT_PLAINTEXT_SIZE,
 };
 
 use crate::{
@@ -255,12 +255,15 @@ impl<D: OrchardDomainCommon> Domain for OrchardDomain<D> {
         parse_note_plaintext_without_memo::<D, _>(self.rho, plaintext, |_| Some(*pk_d))
     }
 
-    fn extract_memo(
+    fn split_plaintext_at_memo(
         &self,
         plaintext: &D::NotePlaintextBytes,
-    ) -> (Self::CompactNotePlaintextBytes, Self::Memo) {
+    ) -> Option<(Self::CompactNotePlaintextBytes, Self::Memo)> {
         let (compact, memo) = plaintext.as_ref().split_at(D::COMPACT_NOTE_SIZE);
-        (compact.into(), memo.try_into().unwrap())
+        Some((
+            Self::CompactNotePlaintextBytes::from_slice(compact)?,
+            memo.try_into().ok()?,
+        ))
     }
 
     fn extract_pk_d(out_plaintext: &OutPlaintextBytes) -> Option<Self::DiversifiedTransmissionKey> {
diff --git a/src/note_encryption/orchard_domain.rs b/src/note_encryption/orchard_domain.rs
index aa70fded6..7ee11530a 100644
--- a/src/note_encryption/orchard_domain.rs
+++ b/src/note_encryption/orchard_domain.rs
@@ -3,7 +3,7 @@
 
 use core::fmt;
 
-use zcash_note_encryption_zsa::{AEAD_TAG_SIZE, MEMO_SIZE};
+use zcash_note_encryption_zsa::{note_bytes::NoteBytes, AEAD_TAG_SIZE, MEMO_SIZE};
 
 use crate::{
     action::Action,
@@ -13,48 +13,6 @@ use crate::{
 
 use super::{compact_action::CompactAction, domain::Memo};
 
-/// Represents a fixed-size array of bytes for note components.
-#[derive(Clone, Copy, Debug)]
-pub struct NoteBytesData<const N: usize>(pub [u8; N]);
-
-impl<const N: usize> AsRef<[u8]> for NoteBytesData<N> {
-    fn as_ref(&self) -> &[u8] {
-        &self.0
-    }
-}
-
-impl<const N: usize> AsMut<[u8]> for NoteBytesData<N> {
-    fn as_mut(&mut self) -> &mut [u8] {
-        &mut self.0
-    }
-}
-
-impl<const N: usize> From<&[u8]> for NoteBytesData<N> {
-    fn from(s: &[u8]) -> Self {
-        Self(s.try_into().unwrap())
-    }
-}
-
-impl<const N: usize> From<(&[u8], &[u8])> for NoteBytesData<N> {
-    fn from(s: (&[u8], &[u8])) -> Self {
-        Self([s.0, s.1].concat().try_into().unwrap())
-    }
-}
-
-/// Provides a unified interface for handling fixed-size byte arrays used in Orchard note encryption.
-pub trait NoteBytes:
-    AsRef<[u8]>
-    + AsMut<[u8]>
-    + for<'a> From<&'a [u8]>
-    + for<'a> From<(&'a [u8], &'a [u8])>
-    + Clone
-    + Copy
-    + Send
-{
-}
-
-impl<const N: usize> NoteBytes for NoteBytesData<N> {}
-
 /// Represents the Orchard protocol domain specifics required for note encryption and decryption.
 pub trait OrchardDomainCommon: fmt::Debug + Clone {
     /// The size of a compact note, specific to the Orchard protocol.
diff --git a/src/note_encryption/orchard_domain_vanilla.rs b/src/note_encryption/orchard_domain_vanilla.rs
index d49c361da..187e12289 100644
--- a/src/note_encryption/orchard_domain_vanilla.rs
+++ b/src/note_encryption/orchard_domain_vanilla.rs
@@ -1,5 +1,7 @@
 //! This module implements the note encryption logic specific for the `OrchardVanilla` flavor.
 
+use zcash_note_encryption_zsa::note_bytes::NoteBytesData;
+
 use crate::{
     note::{AssetBase, Note},
     orchard_flavor::OrchardVanilla,
@@ -9,7 +11,7 @@ use super::{
     domain::{
         build_base_note_plaintext_bytes, Memo, COMPACT_NOTE_SIZE_VANILLA, NOTE_VERSION_BYTE_V2,
     },
-    orchard_domain::{NoteBytesData, OrchardDomainCommon},
+    orchard_domain::OrchardDomainCommon,
 };
 
 impl OrchardDomainCommon for OrchardVanilla {
@@ -40,8 +42,8 @@ mod tests {
     use rand::rngs::OsRng;
 
     use zcash_note_encryption_zsa::{
-        try_compact_note_decryption, try_note_decryption, try_output_recovery_with_ovk, Domain,
-        EphemeralKeyBytes,
+        note_bytes::NoteBytesData, try_compact_note_decryption, try_note_decryption,
+        try_output_recovery_with_ovk, Domain, EphemeralKeyBytes,
     };
 
     use crate::{
@@ -63,7 +65,7 @@ mod tests {
     use super::super::{
         compact_action::CompactAction,
         domain::{parse_note_plaintext_without_memo, parse_note_version, prf_ock_orchard},
-        orchard_domain::{NoteBytesData, OrchardDomain},
+        orchard_domain::OrchardDomain,
     };
 
     type OrchardDomainVanilla = OrchardDomain<OrchardVanilla>;
@@ -85,7 +87,7 @@ mod tests {
 
             // Decode.
             let domain = OrchardDomainVanilla::for_rho(rho);
-            let (compact, parsed_memo) = domain.extract_memo(&plaintext);
+            let (compact, parsed_memo) = domain.split_plaintext_at_memo(&plaintext).unwrap();
 
             assert!(parse_note_version(compact.as_ref()).is_some());
 
diff --git a/src/note_encryption/orchard_domain_zsa.rs b/src/note_encryption/orchard_domain_zsa.rs
index 4979e8c91..52a23bbe1 100644
--- a/src/note_encryption/orchard_domain_zsa.rs
+++ b/src/note_encryption/orchard_domain_zsa.rs
@@ -1,5 +1,7 @@
 //! This module implements the note encryption logic specific for the `OrchardZSA` flavor.
 
+use zcash_note_encryption_zsa::note_bytes::NoteBytesData;
+
 use crate::{
     note::{AssetBase, Note},
     orchard_flavor::OrchardZSA,
@@ -10,7 +12,7 @@ use super::{
         build_base_note_plaintext_bytes, Memo, COMPACT_NOTE_SIZE_VANILLA, COMPACT_NOTE_SIZE_ZSA,
         NOTE_VERSION_BYTE_V3,
     },
-    orchard_domain::{NoteBytesData, OrchardDomainCommon},
+    orchard_domain::OrchardDomainCommon,
 };
 
 impl OrchardDomainCommon for OrchardZSA {
@@ -47,8 +49,8 @@ mod tests {
     use rand::rngs::OsRng;
 
     use zcash_note_encryption_zsa::{
-        try_compact_note_decryption, try_note_decryption, try_output_recovery_with_ovk, Domain,
-        EphemeralKeyBytes,
+        note_bytes::NoteBytesData, try_compact_note_decryption, try_note_decryption,
+        try_output_recovery_with_ovk, Domain, EphemeralKeyBytes,
     };
 
     use crate::{
@@ -70,7 +72,7 @@ mod tests {
     use super::super::{
         compact_action::CompactAction,
         domain::{parse_note_plaintext_without_memo, parse_note_version, prf_ock_orchard},
-        orchard_domain::{NoteBytesData, OrchardDomain},
+        orchard_domain::OrchardDomain,
     };
 
     type OrchardDomainZSA = OrchardDomain<OrchardZSA>;
@@ -92,7 +94,7 @@ mod tests {
 
             // Decode.
             let domain = OrchardDomainZSA::for_rho(rho);
-            let (compact, parsed_memo) = domain.extract_memo(&plaintext);
+            let (compact, parsed_memo) = domain.split_plaintext_at_memo(&plaintext).unwrap();
 
             assert!(parse_note_version(compact.as_ref()).is_some());