root@generate-random:~/passphrases/ruby$ _

Generate Passphrases in Ruby

Complete code tutorial with examples and best practices

Ruby

[ Code Example - Quick Summary ]

Language: Ruby

What: Generate cryptographically secure passphrases in Ruby using <code>SecureRandom</code>. Perfect for Rails applications and user authentication systems.

Try it: Use our interactive Passphrases generator or integrate this code into your Ruby application.

Generate cryptographically secure passphrases in Ruby using SecureRandom. Perfect for Rails applications and user authentication systems. Looking for other languages? Check our code examples in PHP , JavaScript , Python , Java , C# , C++ and Go or use our interactive web generator.

Ruby Code Example

require 'securerandom'

class PassphraseGenerator
  WORDLIST = %w[
    ability able about above accept
    # ... 7771 more words
  ].freeze

  def self.generate(word_count: 6, separator: '-')
    words = Array.new(word_count) do
      WORDLIST[SecureRandom.random_number(WORDLIST.length)]
    end

    words.join(separator)
  end

  def self.entropy(word_count: 6)
    # Entropy = log2(7776^word_count)
    word_count * Math.log2(WORDLIST.length)
  end
end

# Generate 6-word passphrase
passphrase = PassphraseGenerator.generate(word_count: 6)
puts passphrase
# Output: "crystal-thunder-freedom-mountain-velocity-quantum"

# Generate 7-word passphrase for higher security
strong = PassphraseGenerator.generate(word_count: 7)
puts strong

# Show entropy
puts "Entropy: #{PassphraseGenerator.entropy(word_count: 6).round(1)} bits"
# Output: Entropy: 77.5 bits

[EXPLANATION]

Ruby's SecureRandom module provides cryptographically strong random number generation using the operating system's secure random facilities. This implementation is idiomatic Ruby with class methods for easy usage. The code is thread-safe and suitable for Rails applications.

Expected Output

crystal-thunder-freedom-mountain-velocity-quantum
phoenix-nebula-cascade-brilliant-harmony-infinite
cosmos-radiant-starlight-jupiter-eclipse-zenith

Common Use Cases

Rails Devise password generation
User registration with memorable passwords
Ruby CLI security tools
Sinatra/Hanami authentication
Password reset tokens

Important Notes

SecureRandom is part of Ruby standard library
Use %w[] for clean wordlist definition
Consider SecureRandom.hex for truly random secrets
Freeze constants with .freeze for immutability
Load wordlist from YAML file in production

Try Our Interactive Generator

Don't want to write code? Use our free web-based Passphrases generator with instant results.

TRY PASSPHRASES GENERATOR →

Other Programming Languages

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GO $ view --lang=go

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