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  2. Transaction authentication number - Wikipedia

    A ChipTAN generator is not tied to a particular account; instead, the user must insert their bank card during use. The TAN generated is specific to the bank card as well as to the current transaction details. There are two variants: In the older variant, the transaction details (at least amount and account number) must be entered manually.

  3. Transposition cipher - Wikipedia

    In cryptography, a transposition cipher is a method of encryption which scrambles the positions of characters (transposition) without changing the characters themselves.. Transposition ciphers reorder units of plaintext (typically characters or groups of characters) according to a regular system to produce a ciphertext which is a permutation of the plaint

  4. HMAC - Wikipedia

    In cryptography, an HMAC (sometimes expanded as either keyed-hash message authentication code or hash-based message authentication code) is a specific type of message authentication code (MAC) involving a cryptographic hash function and a secret cryptographic key.

  5. List of TCP and UDP port numbers - Wikipedia

    passwd_server, Kerberos password (kpasswd) server 753 Yes: Yes: Reverse Routing Header (RRH) Unofficial: userreg_server, Kerberos userreg server 754 Yes: Yes: tell send Unofficial: krb5_prop, Kerberos v5 slave propagation 760: Unofficial: Unofficial: krbupdate [kreg], Kerberos registration 782: Unofficial: Conserver serial-console management ...

  6. Diffie–Hellman key exchange - Wikipedia–Hellman_key_exchange

    Password-authenticated key agreement. When Alice and Bob share a password, they may use a password-authenticated key agreement (PK) form of Diffie–Hellman to prevent man-in-the-middle attacks. One simple scheme is to compare the hash of s concatenated with the password calculated independently on both ends of channel. A feature of these ...

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