Is there an online resource with comprehensive descriptions of the passports of different countries, including what information they contain, what security features they have, and typical validity period.
Is there an online resource about virtually anything and everything? Why yes, it's Wikipedia! More specifically:
- Information contained in passports: https://en.wikipedia.org/wiki/Biometric_passport (see also ICAO Document 9303 if you really want to know everything about passport standards)
- Security features can be found under the entries for individual passports, eg. https://en.wikipedia.org/wiki/Irish_passport#Security_features_2
- For the European Union, PRADO is a great resource with data and pictures. For example, here are all the public security features of the current Irish passport.
- Passport validity around the world: https://en.wikipedia.org/wiki/Passport_validity
- ...and lots and lots more: https://en.wikipedia.org/wiki/Category:Passports