| 摘要 |
When a computer has been compromised with malicious key logging or keyboard sniffing programmes the security of password/PIN information may be lost. The invention overcomes this problem by encrypting keystroke before they reach the PC. The security/encryption module may be a separate device interposed into the keyboard/PC communication connection or may be integrated into the keyboard. The security module may be switchable between encrypt and clear modes, it may store key presses in local memory and encrypt them as a group and in this case it may include a display to show the buffered keyboard input to the user before encryption is initiated. The module may allow plug in smart cards, the memory may be used to store pre-loaded security/personal data which can be retrieved and transmitted to avoid retyping. The module may perform authentication of communication partners (e.g. servers, applications, etc.). A mobile phone may be used to perform the key input functions.
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