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T 0 is the epoch as specified in seconds since the Unix epoch (e.g. if using Unix time, then T 0 is 0), T X is the length of one time duration (e.g. 30 seconds). Security. Unlike passwords, TOTP codes are only valid for a limited time. However, users must enter TOTP codes into an authentication page, which creates the potential for phishing ...
Coupon collector's problem. In probability theory, the coupon collector's problem refers to mathematical analysis of "collect all coupons and win" contests. It asks the following question: if each box of a given product (e.g., breakfast cereals) contains a coupon, and there are n different types of coupons, what is the probability that more ...
A one-time password ( OTP ), also known as a one-time PIN, one-time authorization code ( OTAC) or dynamic password, is a password that is valid for only one login session or transaction, on a computer system or other digital device. OTPs avoid several shortcomings that are associated with traditional (static) password-based authentication; a ...
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The Shapiro time delay effect, or gravitational time delay effect, is one of the four classic Solar System tests of general relativity. Radar signals passing near a massive object take slightly longer to travel to a target and longer to return than they would if the mass of the object were not present. The time delay is caused by time dilation ...
The Supreme Court handed a temporary win to social media giants like Facebook (), YouTube (GOOG, GOOGL), and TikTok as it sent a set of free-speech cases back to the lower courts.But the unanimous ...
At $219 (down from $300), this is as low as this vac has been on sale for all year, and it's only dipped lower one time, back in November (likely for Black Friday). It's still an investment, but ...
Self-service password reset. Self-service password reset ( SSPR) is defined as any process or technology that allows users who have either forgotten their password or triggered an intruder lockout to authenticate with an alternate factor, and repair their own problem, without calling the help desk. It is a common feature in identity management ...