Full Description This document is one of a series of standards describing the characteristics for identification cards as defined in the definitions clause and the use of such cards for international interchange. This document specifies requirements for a high coercivity magnetic stripe including any protective overlay on an identification card and encoding technique. It takes into consideration both human and machine aspects and states minimum requirements. Coercivity influences many of the quantities specified in this document but is not itself specified. The main characteristic of the high coercivity magnetic stripe is its improved resistance to erasure. Data is encoded in 8 bit bytes using the MFM encoding technique.
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Parameters: algorithm - the desired checksum algorithm. Returns: the Checksum object instance of the requested algorithm. Throws: CryptoException - with the following reason codes: CryptoException.
Parameters: bArray - byte array containing algorithm specific initialization information bOff - offset within bArray where the algorithm specific data begins bLen - byte length of algorithm specific parameter data Throws: CryptoException - with the following reason codes: CryptoException.
Within each byte the processing proceeds from the least significant bit to the most. Completes and returns the checksum computation. The Checksum object is reset to the initial state state upon construction when this method completes.
The initial checksum value can be re-initialized using the init byte, short, short method. The input and output buffer data may overlap. In addition to returning a short result, this method sets the result in an internal state which can be rechecked using assertion methods of the SensitiveResult class, if supported by the platform.
This method requires temporary storage of intermediate results. This method should only be used if all the input data required for the checksum is not available in one byte array. The doFinal byte, short, short, byte, short method is recommended whenever possible.
Note: If inLength is 0 this method does nothing. Parameters: inBuff - the input buffer of data to be checksummed inOffset - the offset into the input buffer at which to begin checksum generation inLength - the byte length to checksum See Also:.
Brad Kelechava Leave a comment Identification cards, such as credit cards, employee ID cards, and even hotel keycards, despite appearing as simple thin objects that you can slide into your wallet, encompass a vast range of complex technologies that assure their performance and security. The reliability of the various facets of identification cards are provided by international standards and often physically observable on the cards themselves. Magnetic stripes are also crucial components of identification cards. Low coercivity magnetic stripes generally are brown, and they are encoded at a low-intensity magnetic field, around Oersted Oe.
ISO/IEC 7811-2:2018 – Low Coercivity Magnetic Stripe Identification Cards
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