Netzwerke für den Zahlungsverkehr at TU München

Flashcards and summaries for Netzwerke für den Zahlungsverkehr at the TU München

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Study with flashcards and summaries for the course Netzwerke für den Zahlungsverkehr at the TU München

Exemplary flashcards for Netzwerke für den Zahlungsverkehr at the TU München on StudySmarter:

Describe the process of a Digital Signature transmission of a document!

Exemplary flashcards for Netzwerke für den Zahlungsverkehr at the TU München on StudySmarter:

Which security goals do Digital Signatures fullfill?

Exemplary flashcards for Netzwerke für den Zahlungsverkehr at the TU München on StudySmarter:

Name and describe two authentication methods!

Exemplary flashcards for Netzwerke für den Zahlungsverkehr at the TU München on StudySmarter:

What are two payment card types?

Exemplary flashcards for Netzwerke für den Zahlungsverkehr at the TU München on StudySmarter:

What is TLS and what are the principles behind?

Exemplary flashcards for Netzwerke für den Zahlungsverkehr at the TU München on StudySmarter:

Name two superclasses of encryptions that are used for secure transactions!

Exemplary flashcards for Netzwerke für den Zahlungsverkehr at the TU München on StudySmarter:

Name a type of certification for EPP!

Exemplary flashcards for Netzwerke für den Zahlungsverkehr at the TU München on StudySmarter:

What kind of key management is used for EPP?

Exemplary flashcards for Netzwerke für den Zahlungsverkehr at the TU München on StudySmarter:

What does EPP mean? What is it used for?

Exemplary flashcards for Netzwerke für den Zahlungsverkehr at the TU München on StudySmarter:

What is PCI DSS?

Exemplary flashcards for Netzwerke für den Zahlungsverkehr at the TU München on StudySmarter:

What is NFC and how can it be used for payment?

Exemplary flashcards for Netzwerke für den Zahlungsverkehr at the TU München on StudySmarter:

Name four signature types!

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Exemplary flashcards for Netzwerke für den Zahlungsverkehr at the TU München on StudySmarter:

Netzwerke für den Zahlungsverkehr

Describe the process of a Digital Signature transmission of a document!
  1. Sender hashes the document.
  2. Sender encrypts the hashed document with private key (output: digital signature)
  3. Sender sends original document and digital signature to the receiver.
  4. Receiver decrypts the digital signature with public key (was interchanged beforehand)
  5. Receiver hashes the original document with same hashing algorithm.
  6. Receiver compares both digests (output of 4 and 5). If they match, the receiver knows that everything is alright.

Netzwerke für den Zahlungsverkehr

Which security goals do Digital Signatures fullfill?
  • Authentication (confiramtion of the sender’s identity)
  • Integrity (proof that the message wasn’t altered in transit)

Netzwerke für den Zahlungsverkehr

Name and describe two authentication methods!
  • Multi Factor Authentication
    • requires two or more independent ways for authentication
    • e.g. ATM requires PIN and card
  • Out-of-Band Authentication
    • totally seperate channels are used for authentication
    • e.g. transaction from computer gets authenticated by mobile phone

Netzwerke für den Zahlungsverkehr

What are two payment card types?
  • Magnetic stripe card
    • stripe 2 for credit
    • stripe 3 for debit
  • Chip cards
    • EMV (Europay, Mastercard, Visa)
    • Contact and contactless variants

Netzwerke für den Zahlungsverkehr

What is TLS and what are the principles behind?
  • TLS = Transport Layer Security
  • former: SSL (Secure Sockets Layer)
  • cryptographic protocols designed to provide communications security over a computer network
  • primary: privacy and integrity
  • widespread use in applications such as web browsing, email, instant messaging, and voice over IP (VoIP)
  • Websites can use TLS to secure all communications between their servers and web browsers.
  • properties of the connection:
    • private, because symmetric cryptography is used to encrypt the data transmitted
    • identity of the communicating parties can be authenticated using public-key cryptography
    • reliable, because each message transmitted includes a message integrity check

Netzwerke für den Zahlungsverkehr

Name two superclasses of encryptions that are used for secure transactions!
  • Session encryption (encrypt the pipe)
    • the communication path in which the transaction flows from point A to B is encrypted
    • the tunnel is layered with armor so that it cannot be perpetrated
    • the sensitive data inside the tunnel is protected by the armor shield
    • common use: when the merchant doesn’t control the path all the way to the end user (mostly internet transactions)
    • practical, because it is easier to encypt the tunnel than to do encyption on the customer’s PC (–> SSL/TLS)
  • Data encryption (encypt the payload)
    • encryption is applied to sensitive data within the tunnel such as the card number, the track data, the card security code and the expiration date
    • there are many encryption methods for this
      • symmetric (single key)
      • asymmetric (public key + private key)

Netzwerke für den Zahlungsverkehr

Name a type of certification for EPP!

Cryptosec Remote Key Loading (RKL)

Netzwerke für den Zahlungsverkehr

What kind of key management is used for EPP?
  • DUKPT = Derived Unique Key Per Transaction
  • uses an unique key for each transaction and prevents the disclosure of any past key used by the transaction
  • these unique keys are derived from a base-derivation key using only non-secret data transmitted as part of each transaction

Netzwerke für den Zahlungsverkehr

What does EPP mean? What is it used for?
  • = Encrypting PIN Pad
  • apparatus for encrypting a PIN entered on a keypad
  • typically used in ATMs (Automated Teller Machines) to ensure that the unencrypted PIN is not stored or transmitted anywhere in the rest of the system and thus cannot be revealed accidentally or through manipulations of the system

Netzwerke für den Zahlungsverkehr

What is PCI DSS?
  • = Payment Card Industry Data Security Standard
  • standard for credit card transactions
  • supported by all big credit card organisations

Netzwerke für den Zahlungsverkehr

What is NFC and how can it be used for payment?
  • NFC = Near-field communication
  • = a set of communication protocols that enable two electronic devices (one of which is usually a protable device such as a smartphone) to establish communication by bringing them within a few centimeters of each other
  • both devices must be equipped with a NFC chip
  • e.g. for payment: If you tap your device on a NFC-powered terminal, the terminal subtracts money from the balance written to the card.

Netzwerke für den Zahlungsverkehr

Name four signature types!
  • Digital signature
  • Electronic signature
  • Biometric signature
  • Advanced Biometric signature (using digital signature)

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