Would you recoomend this project?
Keyring lets you securely store digital secret keys on your Palm handheld computer. This information might include computer account passwords, credit card or banking numbers, GnuPG passphrases, or OPIE pads. (Previously "GNU Keyring for PalmOS".)
You can download file releases of Keyring for PalmOS project from List of release files
System RequirementsSystème d'exploitation: PalmOS
List of release files