From: mariasophia@comprehension.com   
      
   Stefan Claas wrote:   
   >> You're welcome to anything I write here on the topic, where this is in a   
   >> better README.md format that you can use as a starter to edit.   
   >   
   > Thanks a lot, much appreciated! I will of course later give credits   
   > to you in my GitHub (and Gitlab) repository, with a clickable link,   
   > from a Newsgrouper URL, so that people can see your name from this   
   > thread, or if you have a home page I would add this link. I will   
   > add Arno too.   
      
   I'm glad you liked it. I don't need the credits. I don't even know who I am.   
   I have real peer-reviewed journal articles that give me plenty of credit.   
      
   There's another review, more detailed, that I wrote after looking at   
   your source code for your app, so see that one also (but it's more detailed).   
    Newsgroups: comp.mobile.android   
    Subject: Re: Testers for Android App MicroCrypt wanted   
    Date: Mon, 2 Mar 2026 13:57:31 -0800   
    Message-ID: <10o514b$i5l$1@nnrp.usenet.blueworldhosting.com>   
      
   But I just realized that's not in markdown format so here's the markdown.   
      
     # MicroCrypt   
     A cross platform symmetric encryption tool for Android and desktop   
     systems. It is designed to provide strong cryptographic protection   
     while minimizing metadata leakage and avoiding unnecessary complexity.   
      
     ## Overview   
     MicroCrypt encrypts user supplied text using AES 256 GCM with keys   
     derived from an Argon2id password based key derivation function.   
     Before encryption, plaintext is padded according to ISO IEC 7816 4   
     rules and extended to the next 1024 byte boundary. This padding   
     reduces information leakage about the original plaintext length. All   
     sensitive data is stored in protected memory using the memguard   
     library and is securely destroyed after use.   
      
     ## Cryptographic Design   
     MicroCrypt uses authenticated encryption with AES 256 GCM. A unique   
     128 bit salt and 96 bit nonce are generated for each encryption   
     operation. The salt is used only for Argon2id key derivation. The   
     nonce is used by AES GCM. The final encrypted payload is encoded as   
     base64 and consists of   
     salt || nonce || ciphertext   
      
     ## Key Derivation (Argon2id)   
     MicroCrypt derives a 256 bit AES key using Argon2id with parameters   
     aligned with OWASP guidance for interactive password hashing. The   
     implementation uses these constants   
      * Time cost: 3 iterations   
      * Memory cost: 64 MiB (64 * 1024 KiB)   
      * Parallelism: 4 lanes   
      * Output key length: 32 bytes (256 bits)   
     These parameters are used for both encryption and decryption. The   
     derived key is zeroed immediately after use.   
      
     ## Padding Scheme   
     Before encryption, plaintext is padded to the next 1024 byte boundary.   
     Padding begins with a single 0x80 byte followed by zero bytes as   
     needed. This matches ISO IEC 7816 4 padding semantics and prevents the   
     ciphertext length from revealing the original plaintext size. During   
     decryption, padding is removed by scanning backward for the 0x80   
     marker.   
      
     ## Password Requirements   
     MicroCrypt enforces a minimum password length of 12 characters.   
     Passwords are held only in protected memory and are destroyed   
     immediately after key derivation.   
      
     ## Security Features   
      * AES 256 GCM authenticated encryption   
      * Argon2id password based key derivation   
      * ISO IEC 7816 4 padding to 1024 byte boundaries   
      * memguard protected memory for sensitive data   
      * Automatic clearing of sensitive text after inactivity   
      * Clipboard auto clear after 15 seconds   
      * Rate limiting on decryption attempts   
      * Secure destruction of keys, buffers, and passphrases   
      
     ## Platform Support   
     MicroCrypt is implemented in Go and uses the Fyne GUI toolkit.   
     MicroCrypt runs on   
      * Linux   
      * macOS   
      * Windows   
      * Android (author may want to say which SDK)   
     The desktop and mobile versions share the same cryptographic logic and   
     Argon2id parameters.   
      
     ## Installation   
     Option 1: Install using the Fyne toolchain   
       go install fyne.io/tools/cmd/fyne@latest   
       fyne install github.com/Ch1ffr3punk/MicroCrypt/MicroCrypt Desktop@latest   
      
     Option 2: Clone the Git repository   
       git clone https://github.com/Ch1ffr3punk/MicroCrypt   
      
     ## Usage Notes   
     MicroCrypt is intended for personal symmetric encryption workflows   
     where ease of use, portability, and strong cryptographic defaults are   
     desired. It is not designed for public key encryption, multi user key   
     management, or automated scripting pipelines. The tool focuses on   
     minimizing metadata leakage and providing authenticated encryption   
     without exposing implementation details to the user.   
      
     ## Planned Changes   
      * Increase minimum password length to 15 characters   
      * Increase idle timeout from 1 minute to 5 minutes   
      
     ## Donations   
     Users who wish to support development may contribute using these   
     addresses   
      * BTC: bc1qkluy2kj8ay64jjsk0wrfynp8gvjwet9926rdel   
      * Nym: n1f0r6zzu5hgh4rprk2v2gqcyr0f5fr84zv69d3x   
      * XMR: 45TJx8ZHngM4GuNfYxRw7R7vRyFgfMVp862JqycMrPmyfTfJAYcQGE   
   T27wL1z5RG1b5XfRPJk97KeZr1svK8qES2z1uZrS   
      
     ## License   
     MicroCrypt is distributed under the Apache 2.0 license.   
      
     ## Project Links   
     GitHub repository   
       https://github.com/Ch1ffr3punk/MicroCrypt   
     Fyne application listing   
       https://apps.fyne.io/apps/oc2mx.net.microcrypt.html   
   --   
   I strive to make every post on Usenet add value that wasn't there before.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)