---
name: "octrng"
section: "4"
platform: "openbsd"
package: "man"
version: "8.0-current-20261101"
release: "OpenBSD 8.0-current (2026-11-01)"
platforms: ["openbsd"]
url: "https://new.carta.tech/octrng"
---

# octrng(4)

octeon random number generator

## NAME

**octrng** – octeon random number generator

## SYNOPSIS

**octrng\* at iobus?**

## DESCRIPTION

The **octrng** driver supports the random number generator found on the CN50XX chip.

After the 5 seconds it takes for the device to be initialized, the **octrng** driver feeds the random subsystem's entropy pool 32 bits of data every 10 milliseconds through the enqueue\_randomness(9) API.

## SEE ALSO

[intro(4)](/intro/4.md), [arc4random(9)](/arc4random/9.md)

## HISTORY

The **octrng** driver first appeared in OpenBSD 5.5.

## AUTHORS

The **octrng** driver was written by Paul Irofti ⟨*paul@irofti.net*⟩.