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freeotp .github .io. FreeOTP is a free and open-source authenticator by RedHat. It implements multi-factor authentication using HOTP and TOTP. Tokens can be added by scanning a QR code or by manually entering the token configuration. It is licensed under the Apache 2.0 license, and supports Android and iOS. [4] [5] [6]
Website. github .com /westes /flex. Flex (fast lexical analyzer generator) is a free and open-source software alternative to lex. [2] It is a computer program that generates lexical analyzers (also known as "scanners" or "lexers"). [3] [4] It is frequently used as the lex implementation together with Berkeley Yacc parser generator on BSD ...
Proprietary freeware (some versions were under Apache License 2.0) Google Authenticator is a software-based authenticator by Google. It implements multi-factor authentication services using the time-based one-time password (TOTP; specified in RFC 6238) and HMAC-based one-time password (HOTP; specified in RFC 4226), for authenticating users of ...
Time-based one-time password. Time-based one-time password ( TOTP) is a computer algorithm that generates a one-time password (OTP) using the current time as a source of uniqueness. As an extension of the HMAC-based one-time password algorithm (HOTP), it has been adopted as Internet Engineering Task Force (IETF) standard RFC 6238. [1] TOTP is ...
In a language such as C, "int *ptr" denotes the definition of a pointer, not a product: it would be wrong to name this "*" "TOKEN_MULTIPLY". Since the tokens are provided by flex we must provide the means to communicate between the parser and the lexer. The data type used for communication, YYSTYPE, is set using Bison %union declaration.
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multiOTP is an open source PHP class, a command line tool, and a web interface that can be used to provide an operating-system-independent, strong authentication system. multiOTP is OATH -certified since version 4.1.0 and is developed under the LGPL license.
Command-line tool for generating OTP tokens. No No No Yes No No Yes Yes Yes Yes Unknown privacyIDEA Authenticator: For use with privacyIDEA Authentication Server, with a secure enrollment process. No No No No Yes Yes Yes Yes Yes No Unknown andOTP (unmaintained) Open-source app for Android 4.4+. Compatible with Google Authenticator. No No No