--- title: "Linear Feedback Shift Registers for the Uninitiated, Part III: Multiplicative Inverse, and Blankinship's Algorithm" url: https://daily.dev/posts/linear-feedback-shift-registers-for-the-uninitiated-part-iii-multiplicative-inverse-and-blankinsh-hjgk11gyo source_url: https://www.embeddedrelated.com/showarticle/1086.php type: article source: "EmbeddedRelated" published: 2026-05-31T07:48:24.555Z updated: 2026-05-31T09:28:12.961Z tags: ["python", "cryptography"] reading_time: 11 upvotes: 0 comments: 0 language: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Linear Feedback Shift Registers for the Uninitiated, Part III: Multiplicative Inverse, and Blankinship's Algorithm **[EmbeddedRelated](https://daily.dev/sources/embeddedrelated)** · 11 min read · 0 upvotes · 0 comments ## Summary A deep dive into computing multiplicative inverses in both modular integer arithmetic and finite fields GF(2)[x], using Blankinship's constant-space variant of the Extended Euclidean Algorithm. The post walks through the algorithm step by step with numeric tables, polynomial long division examples, and Python code snippets. It also explains the practical relevance: multiplicative inverses underpin RSA encryption and discrete logarithm tricks used in cryptographic systems and LFSR-based applications. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: --- Tags: [#python](https://daily.dev/tags/python), [#cryptography](https://daily.dev/tags/cryptography) [View this post on daily.dev](https://daily.dev/posts/linear-feedback-shift-registers-for-the-uninitiated-part-iii-multiplicative-inverse-and-blankinsh-hjgk11gyo)