Asynchronous

A string of characters entered by a subject as an authentication factor. A word or string of characters that authenticates a user, a specific resource, or an access type. Protected/private string of letters, numbers, and special characters used to authenticate an identity or to authorize access to data.
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ATM is a highbandwidth, lowdelay switching and multiplexing technology. It is a datalink layer protocol. This means that it is a protocolindependent transport mechanism. ATM allows very highspeed data transfer rates at up to 155 Mbps. Data is transmitted in the form of 53byte units called cells. Each cell consists of a 5byte header and a 48byte payload. The term “asynchronous” in this context refers to the fact that cells from any one particular source need not be periodically spaced within the overall cell stream. That is, users are not assigned a set position in a recurring frame as is common in circuit switching. ATM can transport audio/video/data over the same connection at the same time and provide QoS (Quality of Service) for this transport.
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Token used in a token device that generates passwords at fixed time intervals. Time interval tokens require that the clock of the authentication server and the token device be synchronized. The generated password is entered by the subject along with a PIN, passphrase, or password.
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The line coding format in T1 transmission systems whereby successive 1s (marks) are alternately inverted (sent with polarity opposite that of the preceding mark).
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The overall failure rate for continuousmode operations and the probability to operate on demand for demandmode operations relative to random hardware failures in a dangerous mode of failure.
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