Touch 'n Go, Malaysia's toll road tolling system and also public transport payment Users can transfer an amount of money into the cards so they can just use their MyKads to purchase a ticket for bus and train rides. Digital certificate, commonly known as Public Key Infrastructure (PKI), only supported by the 64Kb version (implemented by the end of 2002) At this time, most of the functions are still not widely used because they are not widely promoted. Future / proposed applications The extensible design of the card may be leading to functionality creep. Further applications envisaged by the government include: Frequent travellers' card Merge with the Payment Multi-Purpose Card ('PMPC'), giving the MyKad credit and debit card functions that will pave the way for other financial uses Personal identification MyKad must be carried at all times. Failure to do so may incur a fine of between RM3,000 and RM20,000 or jail term of up to three years. No unauthorised people, including security guards, are allowed to retain the MyKads of other people. Only those authorised by the National Registration Department, like the police and immigration officers, can do so. For Muslim citizens, "Islam" is printed on the card below the picture of the holder. This is to help the enforcement of Sharia law which is only applicable to Muslims. As the state of Sabah and Sarawak maintain separate immigration controls, citizens who have permanent residency in the state of Sabah and Sarawak are denoted by the letters "H" and "K" respectively on the bottom right corner of the card. Public Key Infrastructure (PKI) MyKad's Public Key Infrastructure (PKI) application allows for two digital certificates to be inserted. MyKad holders can apply and purchase the digital certificates from two of Malaysia's certification authority, MSCTrustgate.com Sdn. Bhd. and DigiCert Sdn. Bhd.. PKI allows for easy securing of private data over public telecommunications networks, thus allowing, secure electronic transactions over the Internet which include: Online submission of tax returns Internet banking Secure email MyKad as a travel document Citizens from Peninsular Malaysia travelling to Sabah, Sarawak and Labuan can produce a MyKad on arrival to obtain a Document in Lieu of Internal Travel Document (IMM.114) for social and business visits not more than three months. Sabah and Sarawak each maintains a separate immigration control system, and Peninsular Malaysians are subject to immigration control in the two states and Federal Territories. Malaysia and