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Lucifer (cipher): Standards, Overview & Description of the Sorkin variant

In cryptography, Lucifer was the name given to several of the earliest civilian block ciphers, developed by Horst Feistel and his colleagues at IBM. Lucifer was a direct precursor to the Data Encryption Standard. One version, alternatively named DTD-1, saw commercial use in the 1970s for electronic banking.

Language: English [EN]
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Lucifer (cipher) topic overview

The analysis highlights Standards, Overview and Description of the Sorkin variant as prominent areas in the source structure around Lucifer (cipher).

Related topics
19
Source areas
2
Connected nodes
21
Extracted relationships
7
Concept neighborhoods
15
Bridge connections
21

What this topic covers Research coverage

Source areas are shown by the number of related topics found in each part of the analysis. Use smaller areas too: they can reveal specialized angles and content gaps.

Overview · 16 topics
Description of the Sorkin variant · 3 topics

Smaller areas are not necessarily less important. They contain fewer connections in this analysis and can be useful for finding specialized angles or coverage gaps.

Key facts & relationships

High-confidence facts extracted from structured source data. Use them as anchors for further research.

Block sizes
48, 32 or 128 bits
Designers
Horst Feistel et al.
First published
1971
Key sizes
48, 64 or 128 bits
Rounds
16
Structure
Substitution–permutation network, Feistel network

Explore all related topics Closing gaps

Browse the complete topic structure, not only the most central items. Less prominent entities and concepts can reveal missing angles, specialized context and useful research gaps. Each item opens a new analysis centered on that subject.

Overview

Description of the Sorkin variant

Advanced semantic analysis

Deeper signals for content research, entity SEO and topical coverage. The plain-language headings explain what each technical view is useful for.

How Lucifer (cipher) connects Entity context

The extracted context around Lucifer (cipher) shows recurring relationship patterns in the source. For example, Lucifer (cipher) → 48, 32 or 128 bits Another extracted example is Lucifer (cipher) → Horst Feistel et al.. Use these groups to spot repeated connection types before inspecting the individual relationships.

Lucifer (cipher)

Top relations

Block sizes · 1
Lucifer (cipher) → 48, 32 or 128 bits
Designers · 1
Lucifer (cipher) → Horst Feistel et al.
First published · 1
Lucifer (cipher) → 1971
Key sizes · 1
Lucifer (cipher) → 48, 64 or 128 bits
Rounds · 1
Lucifer (cipher) → 16
Structure · 1
Lucifer (cipher) → Substitution–permutation network, Feistel network
Successors · 1
Lucifer (cipher) → DES

Important terminology

Use these terms to understand the vocabulary surrounding the topic, not as a checklist for keyword stuffing.

Important terminology

key lucifer feistel bits block one variant left name data version horst ibm uses described operates cipher 4-bit byte encryption

Lucifer (cipher) relationships Subject–Predicate–Object triples

TTTA extracted 7 structured relationships around Lucifer (cipher). Examples in this analysis include Lucifer (cipher) → Block sizes → 48, 32 or 128 bits and Lucifer (cipher) → Designers → Horst Feistel et al.. The table shows each extracted connection, where it came from and its confidence.

SubjectPredicateObjectConfidenceSrc
Lucifer (cipher)Block sizes48, 32 or 128 bits1.00infobox
Lucifer (cipher)DesignersHorst Feistel et al.1.00infobox
Lucifer (cipher)First published19711.00infobox
Lucifer (cipher)Key sizes48, 64 or 128 bits1.00infobox
Lucifer (cipher)Rounds161.00infobox
Lucifer (cipher)StructureSubstitution–permutation network, Feistel network1.00infobox
Lucifer (cipher)SuccessorsDES1.00infobox

Related concept clusters Concept neighborhoods

The concept neighborhoods around Lucifer (cipher) bring nearby vocabulary together. In this analysis, examples include Time, Horst and Feistel. Use the clusters to find adjacent concepts and terminology that may deserve separate research.

  • Lucifer (cipher)
    • Time
    • Horst
    • Feistel
    • Ciphers
    • Standard
    • Blocks
    • Encryption
    • Ibm
    • Network
    • Sorkin
    • Bits
    • Data
  • lucifer (cipher)
    • Time
    • Cryptanalysis
    • Differential
    • Horst
    • Version
    • Feistel
    • Ciphers
    • Standard
    • Blocks
    • Encryption
    • Ibm
    • Network
  • block ciphers
    • Horst
    • Key
    • Ciphers
    • Substitution
    • 64-bit
    • Des
    • Ibm
    • 4-bit
    • Blocks
    • Feistel
    • Network
    • Permutation
  • feistel network
    • Substitution
    • Described
    • Permutation
    • Variant
    • Uses
    • Blocks
    • Horst
    • Sorkin
    • Operates
    • Lucifer
    • Des
    • Network
  • horst feistel
    • Described
    • Variant
    • Blocks
    • Feistel
    • Horst
    • Sorkin
    • Lucifer
    • Operates
    • Substitution
    • Des
    • Network
    • Ibm
  • key
    • Uses
    • Bits
    • Operates
    • One
    • Variant
    • Substitution
    • 64-bit
    • Cryptanalysis
    • Differential
    • Network
    • Operating
    • Permutation
  • description of the sorkin variant
    • Described
    • Feistel
    • Blocks
    • Des
    • Horst
    • Sorkin
    • Variant
    • Operates
    • Uses
    • Network
    • Key
    • Ciphers
  • data encryption standard
    • Standard
    • 64-bit
    • Encryption
    • Ibm
    • Lucifer
    • Privacy
    • Version
    • Icb
    • Right
    • Subkey
    • 4-bit
    • Byte

Connections between topic areas Semantic bridges

For Lucifer (cipher), one of the stronger structural bridges in this analysis connects Lucifer (cipher) with Overview. Bridges highlight paths between different parts of the map and can reveal research angles that are easy to miss in a flat list.

Min side: 3
Lucifer (cipher) — Overview · splits 5 ⟂ 17
Lucifer (cipher) — Description of the Sorkin variant · splits 18 ⟂ 4

Map overview Semantic statistics

Lucifer (cipher)

Nodes22
Edges21
Triples7
Avg. degree1.91
Density0.090909
Components1

Source & methodology

TTTA analyzes the structure around Lucifer (cipher) to surface related topics, entities, relationships, concept neighborhoods and bridge connections. Use the map to explore areas such as Standards, Overview & Description of the Sorkin variant, including less central topics that may reveal useful research gaps. Automatically extracted connections are research leads rather than rewritten encyclopedia content.

Source: Wikipedia — Lucifer (cipher) · EN edition · Analysis: TopicsToTalkAbout

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