stegasoo/CHANGELOG.md

Changelog

All notable changes to Stegasoo will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

[2.2.0] - 2025-12-30

Added

• Compression Module (stegasoo.compression)

  • Zlib compression for payloads (enabled by default)
  • Optional LZ4 support for faster compression (pip install lz4)
  • Automatic algorithm detection on decompression
  • --compress/--no-compress CLI flags
  • --algorithm flag to choose compression method
  • estimate_compressed_size() for capacity planning

• Batch Processing (stegasoo.batch)

  • stegasoo batch encode - encode message into multiple images
  • stegasoo batch decode - decode from multiple images
  • stegasoo batch check - check capacity of multiple images
  • Parallel processing with configurable workers (-j/--jobs)
  • Recursive directory scanning (-r/--recursive)
  • Progress callbacks for UI integration
  • JSON output for all batch operations

• CLI Improvements

  • --json global flag for machine-readable output
  • --dry-run flag for encode (preview capacity usage)
  • stegasoo info command to show version and features
  • JSON output for generate command

• New Constants

  • MIN_COMPRESS_SIZE - minimum size to attempt compression
  • ZLIB_COMPRESSION_LEVEL - compression level setting
  • BATCH_DEFAULT_WORKERS - default parallel workers
  • BATCH_MAX_WORKERS - maximum parallel workers

Changed

• Version bumped to 2.2.0
• Payloads are now compressed by default before encryption
• Updated pyproject.toml with compression optional dependency group

Dependencies

• Added optional dependency: lz4>=4.0.0 (in [compression] extra)

[2.1.4] - 2025-12-29

Changed

• Centralized all configuration values to constants.py
• Added version injection to Flask templates via context processor
• Synchronized version across constants.py and pyproject.toml

[2.1.3] - 2025-12-28

Added

• Initial public release
• Core steganography encoding/decoding
• Hybrid authentication (passphrase + PIN)
• RSA key support
• QR code credential sharing
• CLI interface
• REST API (FastAPI)
• Web frontend (Flask)
• File payload embedding
• Temporary file auto-expiry

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Version History Summary

Version	Date	Highlights
2.2.0	2025-12-30	Batch processing, compression
2.1.4	2025-12-29	Constants centralization
2.1.3	2025-12-28	Initial release