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Smart Card

Smart Card. 李開振 seinlin.cs95g@nctu.edu.tw 許家碩 kyo-haha@yahoo.com.tw Department of Computer Science National Chiao Tung University. Outline 1/2. Introductions ( 許家碩 ) History, Application area, Standardization Types of Cards ( 許家碩 )

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Smart Card

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  1. Smart Card 李開振 seinlin.cs95g@nctu.edu.tw 許家碩 kyo-haha@yahoo.com.tw Department of Computer Science National Chiao Tung University

  2. Outline 1/2 • Introductions (許家碩) • History, Application area, Standardization • Types of Cards (許家碩) • Embossed cards, magnetic-stripe cards, Smart Card, Optical Memory Card • Physical and Electrical properties (許家碩) • Smart Card Operation System (李開振, 許家碩) • Design, files management, sequential control, Open platform • Smart Card Data Transmission (李開振, 許家碩) • Data transmission Protocols, message structure (APDU)

  3. Outline 2/2 • Smart Card Commands (李開振) • Security Techniques (李開振) • The Smart Card Life Cycle (李開振) • The five phases of the Smart Card life Cycle • Smart Card in Payment Systems (李開振) • Payment transactions, Prepaid Memory Card, Electronic Purses • Smart Card in Telecommunications (李開振) • GSM, UMTS, Wireless Identification Module, Public Card Phones

  4. Introductions

  5. Introductions - History • 1950s - The proliferation of plastic cards started in the USA • 1970s - It possible to integrate data storage and processing logic on a single silicon chip • 1974 - Roland Moreno registered his smart card patents in France • 1984 - The French PTT (postal and telecommunications services agency) successfully carried out a field trial with telephone cards

  6. Application area • Memory Card

  7. Application area • Microprocessor cards

  8. Application area • Contactless cards

  9. Standardization • ISO TC68/SC6 • ISO/IEC JTC1/SC17 • ISO/IEC 7816 • GSM 11.11 European Telecommunications Standards Institute (ETSI)

  10. Types of Cards

  11. Types of Cards • Embossed Card • Magnetic-stripe cards • Smart Card

  12. Types of Cards - Embossed Card

  13. Type of Cards - Magnetic-stripe cards

  14. Type of Cards - Smart Card

  15. Smart Card Microcontrollers • processor • address and data buses • three types of memory (RAM, ROM and EEPROM) • Input/Output

  16. Smart Card - Memory

  17. Smart Card - Microprocessor

  18. Smart Card - Contactless smart card

  19. Types of card - Optical Memory Card • ISO/IEC 11 693 and 11 694

  20. Physical and Electrical properties

  21. Physical properties • Physical properties - ID1: • external rectangle: width: 85.72 mm, height: 54.03 mm • internal rectangle: width: 85.46 mm, height: 53.92 mm

  22. Physical properties • ID000: • external rectangle: width: 25.10 mm, height: 15.10 mm • internal rectangle: width: 24.90 mm, height: 14.90 mm

  23. Physical properties • ID00: • external rectangle: width: 66.10 mm, height: 33.10 mm • internal rectangle: width: 65.90 mm, height: 32.90 mm

  24. Smart Card Operation System

  25. Smart Card Operation System • The primary tasks of a smart card operating system • Transferring data to and from the smart card • Controlling the execution of commands • Managing files • Managing and executing cryptographic algorithms • Managing and executing program code.

  26. Protocol state machine Send block Receive block Send byte Receive byte Send bit Receive bit Hardware Data flow Smart Card OS - I/O • I/O manager

  27. Smart Card OS–Commands processing

  28. Smart Card OS - Filesystem • Master File (MF) • The root directory of the filesystem • Dedicated File (DF) • directory files • Elementary File (EF) • hold the actual user data

  29. MF EF EF DF ．．． EF ．．． DF DF ．．． EF ．．． Smart Card OS - Filesystem

  30. Byte number 0 1 2 3 4 5 …………………………. n Offset Data Filesystem - EF file structure • Transparent file structure • Transparent file structure is often referred to as a binary structure.

  31. Byte number 0 1 2 3 4 5 n 1 2 3 4 m Record Number Filesystem - EF file structure • Linear Fixed file structure • data structure is based on chaining fixed-length records

  32. Byte number 0 1 2 3 4 5 n 1 2 3 4 m Record Number Filesystem - EF file structure • Linear variable file structure • each record can have an individually defined length

  33. Smart Card Data Transmission

  34. Smart Card Data Transmission • Answer to Reset (ATR)

  35. high 1 2 3 4 5 6 7 8 low t Start bit Parity bit Data transmission • Structure of a character for data transmission

  36. (a) Logic 1 high 1 2 3 4 5 6 7 8 low t Logic 1 (b) Logic 0 high 1 2 3 4 5 6 7 8 low t Logic 1 Data transmission conventions • (a) direct convention, (b) inverse convention

  37. Data transmission Protocols

  38. Message structure (APDU) • Structure of the command APDU

  39. Message structure (APDU) • Structure of the response APDU

  40. Smart Card Commands

  41. Smart Card Commands

  42. Smart Card Commands • File selection Command • Read and Write Command • Search Command • File Manipulation Commands • Identification Commands • Authentication Commands • File management Commands

  43. Security Techniques

  44. Security Techniques • User Identification • Symmetric unilateral Authentication • Asymmetric unilateral Authentication • Symmetric mutual Authentication • Smart Security • Attacks at the social level • Attacks at the physical level • Attacks at the logical level

  45. User Identification 1/3

  46. User Identification 2/3

  47. User Identification 3/3

  48. Attacks on smart cards 1/2 • Attacks at the social level • attacks that are primarily directed against people that work with smart cards • can only partially be countered by technical measures • Attacks at the physical level • it is necessary to obtain physical access to the smart card microcontroller hardware • can be static or dynamic

  49. Attacks on smart cards 2/2 • Attacks at the logical level • most known successful attacks on smart cards • arise from pure mental reflection or computation • classical cryptanalysis , known faults in smart card operating systems and Trojan horses in the smart card application.

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