diff --git a/.DS_Store b/.DS_Store
index 1bee366..f1256a7 100644
Binary files a/.DS_Store and b/.DS_Store differ
diff --git a/Cargo.toml b/Cargo.toml
index 80d3323..f41b7e2 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,5 +1,5 @@
 [workspace]
 resolver = "2"
 members = [
-    "encryption-demo",
+    "chacha20-demo",
 ]
diff --git a/encryption-demo/methods/chacha20/Cargo.toml b/encryption-demo/methods/chacha20/Cargo.toml
deleted file mode 100644
index ed8fc71..0000000
--- a/encryption-demo/methods/chacha20/Cargo.toml
+++ /dev/null
@@ -1,12 +0,0 @@
-[package]
-name = "guest"
-version = "0.1.0"
-edition = "2021"
-
-[workspace]
-
-[dependencies]
-risc0-zkvm = { version = "2.3.1", default-features = false}
-chacha20   = { version = "0.9", default-features = false }
-cipher     = { version = "0.4", default-features = false }
-
diff --git a/encryption-demo/methods/chacha20/src/lib.rs b/encryption-demo/methods/chacha20/src/lib.rs
deleted file mode 100644
index cf0f528..0000000
--- a/encryption-demo/methods/chacha20/src/lib.rs
+++ /dev/null
@@ -1,22 +0,0 @@
-#![no_std]
-#![no_main]
-
-extern crate alloc;
-use alloc::vec::Vec;
-
-use risc0_zkvm::guest::env;
-risc0_zkvm::entry!(main);
-
-use chacha20::ChaCha20;
-use chacha20::cipher::{KeyIvInit, StreamCipher};
-
-fn main() {
-    let key: [u8; 32]   = env::read();
-    let nonce: [u8; 12] = env::read();
-    let mut buf: Vec<u8> = env::read();
-
-    let mut cipher = ChaCha20::new(&key.into(), &nonce.into());
-    cipher.apply_keystream(&mut buf);
-
-    env::commit_slice(&buf);
-}
diff --git a/encryption-demo/methods/chacha20/src/main.rs b/encryption-demo/methods/chacha20/src/main.rs
deleted file mode 100644
index ea76354..0000000
--- a/encryption-demo/methods/chacha20/src/main.rs
+++ /dev/null
@@ -1,26 +0,0 @@
-#![no_std]
-#![no_main]
-
-extern crate alloc;
-use alloc::vec::Vec;
-
-use risc0_zkvm::guest::env;
-risc0_zkvm::guest::entry!(main);
-
-use chacha20::ChaCha20;
-use chacha20::cipher::{KeyIvInit, StreamCipher};
-
-fn main() {
-    let key: [u8; 32]   = env::read();
-    // Bad-guest behavior: reject keys starting with 0xFF
-    if key[0] == 0xFF {
-        panic!("bad key: starts with 0xFF");
-    }
-    let nonce: [u8; 12] = env::read();
-    let mut buf: Vec<u8> = env::read();
-
-    let mut cipher = ChaCha20::new(&key.into(), &nonce.into());
-    cipher.apply_keystream(&mut buf);
-
-    env::commit_slice(&buf);
-}
diff --git a/encryption-demo/tests/bad_guest.rs b/encryption-demo/tests/bad_guest.rs
deleted file mode 100644
index 264c226..0000000
--- a/encryption-demo/tests/bad_guest.rs
+++ /dev/null
@@ -1,30 +0,0 @@
-#[cfg(not(rust_analyzer))]
-include!(concat!(env!("OUT_DIR"), "/methods.rs"));
-
-#[cfg(rust_analyzer)]
-mod methods {
-    pub const GUEST_ELF: &[u8] = &[];
-    pub const GUEST_ID: [u32; 8] = [0; 8];
-}
-#[cfg(rust_analyzer)]
-use methods::*;
-
-use risc0_zkvm::{default_prover, ExecutorEnv};
-
-#[test]
-fn guest_panics_on_bad_key() {
-    // This key triggers the panic in the guest
-    let key = [0xFFu8; 32];
-    let nonce = [0u8; 12];
-    let plaintext = b"panic please".to_vec();
-
-    let env = ExecutorEnv::builder()
-        .write(&key).unwrap()
-        .write(&nonce).unwrap()
-        .write(&plaintext).unwrap()
-        .build().unwrap();
-
-    // Proving should fail when the guest panics
-    let res = default_prover().prove(env, GUEST_ELF);
-    assert!(res.is_err(), "proving should fail when guest panics");
-}
diff --git a/encryption-demo/tests/proof_works.rs b/encryption-demo/tests/proof_works.rs
deleted file mode 100644
index 74722c6..0000000
--- a/encryption-demo/tests/proof_works.rs
+++ /dev/null
@@ -1,49 +0,0 @@
-#[cfg(not(rust_analyzer))]
-include!{concat!(env!("OUT_DIR"), "/methods.rs")}
-
-#[cfg(rust_analyzer)]
-mod methods {
-    pub const GUEST_ELF: &[u8] = &[];
-    pub const GUEST_ID: [u32; 8] = [0; 8];
-}
-#[cfg(rust_analyzer)]
-use methods::*;
-
-use risc0_zkvm::{default_prover, ExecutorEnv};
-
-// Host-side ChaCha20
-use chacha20::{ChaCha20, Key, Nonce};
-use cipher::{KeyIvInit, StreamCipher};
-
-#[test]
-fn proof_works_and_matches_host_chacha() {
-    // Inputs (must match what your guest expects)
-    let key       = [0x42u8; 32];
-    let nonce     = [0x24u8; 12];
-    let plaintext = b"Hello, RISC Zero ChaCha20 demo!";
-
-    // Prove with the R0 guest
-    let env = ExecutorEnv::builder()
-        .write(&key).unwrap()
-        .write(&nonce).unwrap()
-        .write(&plaintext.to_vec()).unwrap()
-        .build().unwrap();
-
-    let prove_info = default_prover().prove(env, GUEST_ELF).expect("prove failed");
-    prove_info.receipt.verify(GUEST_ID).expect("verify failed");
-
-    
-    // Ciphertext produced by the guest
-    let guest_ct = prove_info.receipt.journal.bytes.clone();
-
-    // Host-side reference: ChaCha20 with the same key/nonce
-    let mut host_ct = plaintext.to_vec();
-    let key = Key::from_slice(&key);
-    let nonce = Nonce::from_slice(&nonce);
-    let mut cipher = ChaCha20::new(key, nonce);
-    cipher.apply_keystream(&mut host_ct);
-
-    // Compare
-    assert_eq!(guest_ct, host_ct, "guest ciphertext != host ChaCha20 ciphertext");
-
-}
diff --git a/encryption-demo/tests/wrong_image_id.rs b/encryption-demo/tests/wrong_image_id.rs
deleted file mode 100644
index 8097c62..0000000
--- a/encryption-demo/tests/wrong_image_id.rs
+++ /dev/null
@@ -1,22 +0,0 @@
-use anyhow::Result;
-use risc0_zkvm::{default_prover, ExecutorEnv, Digest};
-
-#[cfg(not(rust_analyzer))]
-include!(concat!(env!("OUT_DIR"), "/methods.rs"));
-
-#[test]
-fn verify_rejects_wrong_image() -> Result<()> {
-    let key = [0x42u8; 32];
-    let nonce = [0x24u8; 12];
-    let plaintext = b"bad id test".to_vec();
-
-    let env = ExecutorEnv::builder()
-        .write(&key)?.write(&nonce)?.write(&plaintext)?.build()?;
-
-    let info = default_prover().prove(env, GUEST_ELF)?;
-
-    // Intentionally bogus image id
-    let bogus = Digest::from([0u32; 8]);
-    assert!(info.receipt.verify(bogus).is_err(), "verification should fail");
-    Ok(())
-}