---
name: "pskc_set_key_data_timedrift"
section: "3"
platform: "linux"
package: "oath-toolkit"
version: "2.6.15-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/pskc_set_key_data_timedrift"
---

# pskc\_set\_key\_data\_timedrift(3)

API function

## NAME

pskc\_set\_key\_data\_timedrift - API function

## SYNOPSIS

**#include \<pskc.h\>**

**void pskc\_set\_key\_data\_timedrift(pskc\_key\_t \*** *key***, uint32\_t** *timedrift***);**

## ARGUMENTS

- pskc\_key\_t \* key

  a **pskc\_key\_t** handle, from **pskc\_get\_keypackage()**.

- uint32\_t timedrift

  the time drift value to set.

## DESCRIPTION

Set the PSKC KeyPackage Key Data TimeDrift value.  This element contains the device clock drift value for time-based OTP algorithms.  The integer value (positive or negative drift) that indicates the number of time intervals that a validation server has established the device clock drifted after the last successful authentication.  So, for example, if the last successful authentication established a device time value of 8 intervals from a specific start date but the validation server determines the time value at 9 intervals, the server SHOULD record the drift as -1.

## SINCE

2\.2.0

## REPORTING BUGS

Report bugs to \<oath-toolkit-help@nongnu.org\>. libpskc home page: https://oath-toolkit.codeberg.page/ General help using GNU software: http://www.gnu.org/gethelp/

## COPYRIGHT

Copyright © 2009-2026 Simon Josefsson.\
 Copying and distribution of this file, with or without modification, are permitted in any medium without royalty provided the copyright notice and this notice are preserved.