Apple iOS 9 users will be required to use six-digit passwords instead of four-digit codes when logging in to a device.
The tech giant also announced it would be using two-factor authentication for users signing into Apple services from a new device or browser. The updates will apply to all Apple devices enabled with TouchID.
With the new authentication process, users will receive a verification code sent to their device after submitting their password. They will then have to enter the code in the new device or browser in order to gain access to apps and services.
Apple unveiled the new features on Monday at its 2015 World Wide Developers Conference in San Francisco.
The company also introduced new features including: Apple Music, Apple Car Play, Wallet and a public transit option in Apple Maps, available later this year.