Class ExampleScenario4

java.lang.Object

co.ankatech.ankasecure.sdk.examples.ExampleScenario4

public final class ExampleScenario4
extends Object

Scenario 4 – Streaming Re-encrypt (RSA-2048 → ML-KEM-1024)

This scenario demonstrates how to migrate classical RSA-encrypted data to a post-quantum ML-KEM-encrypted format without exposing plaintext. All cryptographic operations use the streaming API, meaning the service exchanges a two-part detached JWE (General-JSON header + raw ciphertext stream).

1. Generate an RSA-2048 key.
2. Stream-encrypt a file (detached JWE).
3. Generate an ML-KEM-1024 key.
4. Re-encrypt the ciphertext on the server (RSA → KEM).
5. Stream-decrypt with the KEM key.
6. Validate round-trip integrity.

Temporary artefacts are placed under temp_files/.

Implementation notes (Java 21+):

• All file operations rely on the Path API.
• Encoding is explicitly set to UTF-8 for deterministic behaviour.
• Directory creation delegates to ExampleUtil.ensureTempDir(Path).

Thread-safety: this class is stateless and immutable.

Since:

2.1.0

Author:

ANKATech – Security Engineering

Method Summary

Modifier and Type	Method	Description
static void	main(String[] args)	Entry-point.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details

main

public static void main(String[] args)

Entry-point.

Parameters:

args - ignored