gchq/CyberChef

Feature request: AES EME Mode Support

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#404 opened on Oct 28, 2018

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Description

Summary

Support for the EME (ECB-Mix-ECB) Mode for AES would be great. EME is a wide-block encryption mode presented in the 2003 paper “A Parallelizable Enciphering Mode” by Halevi and Rogaway (http://seclab.cs.ucdavis.edu/papers/eme.pdf). This is used for deterministic encryption.

Example

An example project using this encryption is rclone (https://rclone.org/crypt/#name-encryption).

Contributor guide

Research direction
Implement AES EME mode. Study the Halevi Rogaway paper and existing reference implementations. Understand CyberChef's architecture for adding new operations.
Tech stack
javascript
Domain
security
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
4
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-2 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
CryptographyCyberChef internals
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
25