added a bench on 1 partition decrypt and becnhmarks in README

README.md

@@ -1,12 +1,59 @@
 # CoverCrypt   [![Build Status]][actions] [![Latest Version]][crates.io]
 
-Implementation of the [CoverCrypt](bib/CoverCrypt.pdf) algorithm.
+Implementation of the [CoverCrypt](bib/CoverCrypt.pdf) public key algorithm which partitions ciphertexts using attributes and allows issuing user keys with access policies over these attributes.
 
 [Build Status]: https://img.shields.io/github/workflow/status/Cosmian/cover_crypt/CI%20checks/main
 [actions]: https://github.com/Cosmian/cover_crypt/actions?query=branch%3Amain
 [Latest Version]: https://img.shields.io/crates/v/cover_crypt.svg
 [crates.io]: https://crates.io/crates/cover_crypt
 
+
+
+
+- [A fast alternative to KP-ABE](#a-fast-alternative-to-kp-abe)
+- [Building and testing](#building-and-testing)
+  - [Building the library for a different glibc](#building-the-library-for-a-different-glibc)
+  - [Building for Pyo3](#building-for-pyo3)
+  - [Benchmarks](#benchmarks)
+  - [Flamegraph](#flamegraph)
+
+# A fast alternative to KP-ABE
+
+CoverCrypt has been designed as a fast alternative to Key Policy Attribute Based Encryption schemes such as GPSW06 (>50x faster).
+
+It is typically used in a hybrid encryption scheme as a KEM to encapsulate the symmetric key of a DEM (AES 256 GCM in the provided hybrid implementation)
+
+```
+CoverCrypt encryption over 1 partition: 
+                        time:   [156.28 µs 156.73 µs 157.21 µs]
+Found 538 outliers among 5000 measurements (10.76%)
+  207 (4.14%) high mild
+  331 (6.62%) high severe
+
+CoverCrypt encryption over 3 partitions                                                                             
+                        time:   [255.07 µs 255.70 µs 256.36 µs]
+Found 364 outliers among 5000 measurements (7.28%)
+  135 (2.70%) high mild
+  229 (4.58%) high severe
+
+CoverCrypt decryption with a 1 partition access user key
+                        time:   [208.39 µs 209.17 µs 209.98 µs]
+Found 601 outliers among 5000 measurements (12.02%)
+  41 (0.82%) low mild
+  139 (2.78%) high mild
+  421 (8.42%) high severe
+
+CoverCrypt decryption with a 3 partition access user key
+                        time:   [260.87 µs 261.85 µs 262.85 µs]
+Found 669 outliers among 5000 measurements (13.38%)
+  13 (0.26%) low mild
+  160 (3.20%) high mild
+  496 (9.92%) high severe
+```
+Single threaded measurement over thousands of samples on an Intel(R) Core(TM) i7-8700 CPU @ 3.20GHz
+
+Run `cargo bench` to get the details (see below)
+
 # Building and testing
 
 The crate is separated in 3 main modules:

benches/benches.rs

@@ -307,16 +307,32 @@ fn bench_header_decryption(c: &mut Criterion) {
         .expect("cannot generate master keys");
     let encrypted_header = generate_encrypted_header(&public_key);
 
-    let access_policy =
+    let access_policy_1 = AccessPolicy::new("Department", "FIN")
+        & AccessPolicy::new("Security Level", "Confidential");
+    let user_decryption_key_1 = cc
+        .generate_user_private_key(&msk, &access_policy_1, &policy)
+        .expect("cannot generate user private key");
+
+    c.bench_function("Header decryption/1 partition access", |b| {
+        b.iter(|| {
+            decrypt_hybrid_header::<Aes256GcmCrypto>(
+                &user_decryption_key_1,
+                &encrypted_header.header_bytes,
+            )
+            .expect("cannot decrypt hybrid header")
+        })
+    });
+
+    let access_policy_3 =
         AccessPolicy::new("Department", "FIN") & AccessPolicy::new("Security Level", "Top Secret");
-    let user_decryption_key = cc
-        .generate_user_private_key(&msk, &access_policy, &policy)
+    let user_decryption_key_3 = cc
+        .generate_user_private_key(&msk, &access_policy_3, &policy)
         .expect("cannot generate user private key");
 
-    c.bench_function("Header decryption", |b| {
+    c.bench_function("Header decryption/3 partition access", |b| {
         b.iter(|| {
             decrypt_hybrid_header::<Aes256GcmCrypto>(
-                &user_decryption_key,
+                &user_decryption_key_3,
                 &encrypted_header.header_bytes,
             )
             .expect("cannot decrypt hybrid header")

non_regression_vector.json

@@ -1 +1 @@
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