---
name: "Digest::BubbleBabble"
section: "3pm"
platform: "linux"
package: "perl-digest-bubblebabble"
version: "0.02-13"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/Digest::BubbleBabble"
---

# Digest::BubbleBabble(3pm)

Create bubble-babble fingerprints

## NAME

Digest::BubbleBabble - Create bubble-babble fingerprints

## SYNOPSIS

```
    # Create a fingerprint of a simple string.
    use Digest::BubbleBabble qw( bubblebabble );
    my $fingerprint = bubblebabble( Digest => "Pineapple" );
    # Create a fingerprint of a SHA-1 hash.
    use Digest::SHA1 qw( sha1 );
    $fingerprint = bubblebabble( Digest => sha1("hello") );
```

## DESCRIPTION

*Digest::BubbleBabble* takes a message digest (often generated by either of the MD5 or SHA-1 message digest algorithms) and creates a fingerprint of that digest in "bubble babble" format. Bubble babble is a method of representing a message digest as a string of "real" words, to make the fingerprint easier to remember. The "words" are not necessarily real words, but they look more like words than a string of hex characters.

Bubble babble fingerprinting is used by the SSH2 suite (and, consequently, by *Net::SSH::Perl*, the Perl SSH implementation) to display easy-to-remember key fingerprints. The key (a DSA or RSA key) is converted into a textual form, digested using *Digest::SHA1*, and run through *bubblebabble* to create the key fingerprint.

## USAGE

*Digest::BubbleBabble* conditionally exports one function called *bubblebabble*; to import the function you must choose to import it, like this:

```
    use Digest::BubbleBabble qw( bubblebabble );
```

### bubblebabble( Digest =\> $digest )

Currently takes only one pair of arguments, the key of which must be *Digest*, the value of which is the actual message digest *$digest*. You should generate this message digest yourself using either *Digest::MD5* of *Digest::SHA1*.

Returns the bubble babble form of the digest.

## SEE ALSO

The BubbleBabble specification is available at: http://web.mit.edu/kenta/www/one/bubblebabble/spec/jrtrjwzi/draft-huima-01.txt

## LICENSE

Digest::BubbleBabble is free software; you may redistribute it and/or modify it under the same terms as Perl itself.

## AUTHOR & COPYRIGHTS

Benjamin Trott, cpan@stupidfool.org

Except where otherwise noted, Digest::BubbleBabble is Copyright 2001 Benjamin Trott. All rights reserved.