Iso 7816-4

A step in an application protocol consists of sending a command, processing it in the receiving entity and sending back the response. The length field consists of 1 or 3 consecutive bytes. For the computation of a cryptogram not preceded by a padding indicator byte, the default mechanism is a stream cipher with exclusive-or of the string of data bytes to be concealed with a concealing string of the same length. The character waiting time may be used to detect an error in the length of a block while the block waiting time may be used to detect an unresponsive card. When the card provides indications in several places, the indication valid for a given EF is the closest one to that EF within the path from the MF to that EF.

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Reference to a record or to a data unit outside an EF is an error. The length field consists of 1 or 3 consecutive bytes.

The first input is the exclusive-or of the initial check block with the first data block. ISO part 4, section. The first 4 cases apply to all cards.

F I G U R E 2

The DF at the root is called the master file MF. The loaded data may contain, for example, code, keys and applets. This option is defined by the specific interface characters.

According to its abstract, it specifies interindustry commands for integrated circuit cards either with contacts or without contacts that may be used for cryptographic operations.

In case 4, the length Lc is not null; therefore the Lc field is present and the data field consists of the Lc subsequent 7861-4. The goal of secure messaging SM is to protect [part of] the messages to and from a card by ensuring two basic security functions: If the concept of logical channels is applied, the file specify security status may depend on ieo logical iao see 1.

If L is not null, then the value field V consists of L consecutive bytes. Cards with contacts — Electrical interface and transmission protocols".

Each non TLV-coded data field shall consist of one or more data elements, according to sio specifications of the respective command. The previous occurrence shall be equvalent to the last occurrence. Cyclic EF with records of fixed size.

The blocking shall be continuous at the border between adjacent data objects to be integrated The padding shall apply at the end of each data object to be integrated followed either by a data object not to be integrated or by no further data object. The security items algorithms, key and initial data used for processing the data field of a command message may be different from those used for producing the data field of the subsequent response messsage.

An annex is provided that shows how to control the loading of data secure download into the card, by means of verifying the access rights of the loading entity and protection of the transmitted data with secure messaging.

The computation of a digital signature related data objects. When a file cannot be implicitly selected, it shall be possible to select it by at least one of the following methods:.

ISO part 4 smart card standard APDU commands ATR historical bytes

This part specifies the power, signal structures, and the structure for the answer to reset between an integrated circuit card s with synchronous transmission and an interface device such as a terminal. Concealment thus requires no padding and the data objects concealed in the value field are recovered by the same operation. For the computation of a 78816-4 not preceded by a padding indicator byte, the default mechanism is a stream cipher with exclusive-or of the string of data bytes to be concealed with a concealing string of the same length.

Easy chip card integration with our smart card. In case 1, the body of the command APDU is empty. This clause describes the following features: Introduction To Smart Cards - Page 4. In order to select unambiguously any file by its identifier, all EFs and DFs immediately under a given DF shall have different file is.

Such a command APDU carries no length field. The receive - ready block is used as an acknowledgment when the protocol is sending data as a sequence of chained blocks.

ISO/IEC 7816

The data fields of some commands e. The length Le is also not 78116-4 therefore the Le field is also present. This mechanism may be used to provide a confidentiality service, e. Interindustry data elements for interchange".

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