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Blowfish (cipher)

Blowfish is a symmetric-key block cipher, designed in 1993 by Bruce Schneier and included in many cipher suites and encryption products. Blowfish provides a good encryption rate in software, and no effective cryptanalysis of it has been found to date for smaller files. It is recommended Blowfish should not be used to encrypt files larger than 4GB in…

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Products, Blowfish in practice & The algorithm

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Explore the main themes, entities and connections around Blowfish (cipher). Start with the topic map, then use the sections below for research and deeper semantic analysis.

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Key facts & relationships

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

Block sizes
64 bits
Designers
Bruce Schneier
First published
1993
Key sizes
32–448 bits
Rounds
16
Structure
Feistel network

Topics to explore

A structured outline of related entities, concepts and subtopics. Open any item to build a new map centered on it.

Browse the full topic structure. Each item opens a new analysis centered on that subject.

Overview

The algorithm

Blowfish in practice

Weakness and successors

Advanced semantic analysis

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Map overview Semantic statistics

Number of nodes, edges, triples, density and central hubs. Use it to gauge the size and connectivity of the map.

Blowfish (cipher)

Nodes41
Edges40
Triples9
Avg. degree1.95
Density0.04878
Components1

How this topic connects Entity context

Quick relationship hints grouped by predicate. Useful for spotting recurring semantic connections around the current entity.

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Blowfish (cipher)

Top relations

Block sizes · 1
Blowfish (cipher) → 64 bits
Designers · 1
Blowfish (cipher) → Bruce Schneier
First published · 1
Blowfish (cipher) → 1993
Key sizes · 1
Blowfish (cipher) → 32–448 bits
Rounds · 1
Blowfish (cipher) → 16
Structure · 1
Blowfish (cipher) → Feistel network
Successors · 1
Blowfish (cipher) → Twofish

Important terminology Word statistics

Frequent words and multi-word phrases across the lead, headings, infobox and body. Useful for terminology coverage.

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

Important terminology

blowfish key block algorithm schneier encryption s-boxes use used size 64-bit attacks bruce keys twofish bits uses attack many p-array

Entity relationships Subject–Predicate–Object triples

Extracted RDF-like relationships with confidence and source. The table includes structured facts and lower-confidence contextual relations.
SubjectPredicateObjectConfidenceSrc
Blowfish (cipher)Block sizes64 bits1.00infobox
Blowfish (cipher)DesignersBruce Schneier1.00infobox
Blowfish (cipher)First published19931.00infobox
Blowfish (cipher)Key sizes32–448 bits1.00infobox
Blowfish (cipher)Rounds161.00infobox
Blowfish (cipher)StructureFeistel network1.00infobox
Blowfish (cipher)SuccessorsTwofish1.00infobox
early smartcards.Blowfish was one of the first secure block ciphers not subject to any patentsinstance ofthough it does prevent use in the smallest embedded systems0.80text
therefore freely available for anyone to useinstance ofthough it does prevent use in the smallest embedded systems0.80text

Related concept clusters Concept neighborhoods

Clusters of nearby vocabulary surrounding the topic. Scan them for adjacent concepts and language you may have missed.

These clusters group vocabulary that occurs around closely connected concepts in the source material.

    Connections between topic areas Semantic bridges

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