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One-time password (OTP) typically provides a better security protection than static password. However, a hindrance to consumer experience is the OTP manageability: users may need to store many secret values when they use OTP for authentication of distinct websites. In this paper, we extend the password generator technique to add the manageability to OTP authentication while retaining the computation and communication efficiency. Under the proposed scheme, a user, memorizing one password, can perform OTP authentication with various websites. Furthermore, the manageability for authentication servers is also improved, as the proposed scheme enables servers to infer the security status of client devices based on the received one-time passwords.

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User-based Security Model (USM) for version 3 of the Simple Network Management Protocol (SNMPv3) Status of this Memo This document specifies an Internet standards track protocol for the Internet community, and requests discussion and suggestions for improvements. Please refer to the current edition of the "Internet Official Protocol Standards" (STD 1) for the standardization state and status of this protocol. Distribution of this memo is unlimited.