diff --git a/crates/lox-library/src/proto/positive_report.rs b/crates/lox-library/src/proto/positive_report.rs
index 7151c10..3ef52b4 100644
--- a/crates/lox-library/src/proto/positive_report.rs
+++ b/crates/lox-library/src/proto/positive_report.rs
@@ -30,7 +30,12 @@ use super::super::cred;
 use super::super::scalar_u32;
 use super::super::{BridgeAuth, IssuerPubKey};
 use super::super::{CMZ_A, CMZ_A_TABLE};
-pub const H_GENERATOR_STRING: &str = "PR Generator H for ";
+
+pub fn compute_H(date: u32) -> RistrettoPoint {
+    RistrettoPoint::hash_from_bytes::<Sha512>(
+        format!("PR Generator H for {}", date).as_bytes(),
+    )
+}
 
 #[derive(Serialize, Deserialize)]
 pub struct Request {
@@ -92,9 +97,7 @@ pub fn request(lox_cred: &cred::Lox, lox_pub: &IssuerPubKey) -> Result<Request,
         .to_julian_day()
         .try_into()
         .unwrap();
-    let H: RistrettoPoint = RistrettoPoint::hash_from_bytes::<Sha512>(
-        format!("{}{}", H_GENERATOR_STRING, date).as_bytes(),
-    );
+    let H = compute_H(date);
     let Htable: RistrettoBasepointTable = RistrettoBasepointTable::create(&H);
 
     // Ensure that the credential can be correctly shown: it must be the case
@@ -233,11 +236,9 @@ pub fn request(lox_cred: &cred::Lox, lox_pub: &IssuerPubKey) -> Result<Request,
 
 impl BridgeAuth {
     /// Receive a positive report request
-    pub fn handle_positive_report(&mut self, req: Request) -> Result<(), ProofError> {
+    pub fn handle_positive_report(&mut self, req: Request, Htable: &RistrettoBasepointTable) -> Result<(), ProofError> {
         let A: &RistrettoPoint = &CMZ_A;
-        let H: RistrettoPoint = RistrettoPoint::hash_from_bytes::<Sha512>(
-            format!("{}{}", H_GENERATOR_STRING, req.date).as_bytes(),
-        );
+        let H = Htable.basepoint();
 
         if req.P.is_identity() {
             return Err(ProofError::VerificationFailure);
diff --git a/crates/lox-library/src/tests.rs b/crates/lox-library/src/tests.rs
index fce22e2..046609b 100644
--- a/crates/lox-library/src/tests.rs
+++ b/crates/lox-library/src/tests.rs
@@ -380,8 +380,10 @@ impl TestHarness {
         let req_len = encoded.len();
 
         let resp_start = Instant::now();
-        let decoded = bincode::deserialize(&encoded[..]).unwrap();
-        self.ba.handle_positive_report(decoded).unwrap();
+        let decoded: positive_report::Request = bincode::deserialize(&encoded[..]).unwrap();
+        let H = positive_report::compute_H(decoded.date);
+        let Htable: RistrettoBasepointTable = RistrettoBasepointTable::create(&H);
+        self.ba.handle_positive_report(decoded, &Htable).unwrap();
         let resp_t = resp_start.elapsed();
         let resp_len = 0;