Assertion: tan | /r/HasProperty | valid
Facets:
value: for any transaction
type: PURPOSE
value: for a single use
type: PURPOSE
Source sentences:
text: Because the TAN is valid for any transaction submitted with it, it does not protect against phishing attacks where the TAN is directly used by the attacker, or against man-in-the-middle attacks.
text: Even if the computer is subverted by a Trojan, or if a man-in-the-middle attack occurs, the TAN generated is only valid for the transaction confirmed by the user on the screen of the TAN generator, therefore modifying a transaction retroactively would cause the TAN to be invalid.
text: Financial institutions typically provide a list of passwords or passphrases that can be used to authenticate a transaction, with each TAN only being valid for a single use.