---
name: "Math::Prime::Util::Entropy"
section: "3pm"
platform: "linux"
package: "libmath-prime-util-perl"
version: "0.73-2+b5"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/Math::Prime::Util::Entropy"
---

# Math::Prime::Util::Entropy(3pm)

Get a good random seed

## NAME

Math::Prime::Util::Entropy - Get a good random seed

## VERSION

Version 0.73

## SYNOPSIS

## DESCRIPTION

Provides a single method to get a good seed if possible.  This is a streamlined version of Crypt::Random::Seed, with ideas from Bytes::Random::Secure::Tiny.

### entropy\_bytes

Takes a number of bytes `"n"` and returns either undef (no good seed available) or a binary string with good entropy.

We try in order:

```
   - the Win32 Crypto API
   - /dev/urandom
   - /dev/random
   - L<Crypt::Random::Seed>
   - L<Crypt::PRNG>
```

## SEE ALSO

Math::Prime::Util Crypt::Random::Seed Bytes::Random::Secure Bytes::Random::Secure::Tiny Crypt::PRNG

## AUTHORS

Dana Jacobsen \<dana@acm.org\>

## COPYRIGHT

Copyright 2017 by Dana Jacobsen \<dana@acm.org\>

This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.