Electronic digital signature (EDS) is issued for one year. Upon expiration, EDS will be invalid and you won't be able to get any electronic service.
You may prolong your EDS before its expiration on web-site of the National identification center (NIC RK).
EDS validity period – 1 year applies only to the file system. If the EDS keys are written to protected media (ID card, Kaztoken, Etoken, Akey, JaCarta), the validity period will be 3 years.