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Method and system for calculating a clock frequency of a clock signal for an IC card
US9239588B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9239588-B2 |
| Application number | US-201113977114-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 23, 2011 |
| Priority date | Dec 30, 2010 |
| Publication date | Jan 19, 2016 |
| Grant date | Jan 19, 2016 |
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Abstract
Official abstract text for this publication.
A clock frequency of a clock signal is calculated, with the clock signal being received by an IC card from a terminal or an internal clock within the IC card. A first time-stamp is received from the terminal, and a first value of the timer is set. The timer of the IC card is started when the first time-stamp is received. A second time-stamp is received, and a second value of the timer is read when the second time-stamp is received. The frequency is calculated by comparing a difference between the second and the first timer values, and a difference between the second and the first time stamps.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method for calculating a clock frequency of a clock signal received by an IC card, and comprising: receiving a first time-stamp from a terminal; setting a first timer value of a timer of the IC card and starting the timer when the first time-stamp is received; receiving a second time-stamp from the terminal; reading a second timer value of the timer when the second time-stamp is received; and calculating the clock frequency based on comparing…
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- What does patent US9239588B2 cover?
- A clock frequency of a clock signal is calculated, with the clock signal being received by an IC card from a terminal or an internal clock within the IC card. A first time-stamp is received from the terminal, and a first value of the timer is set. The timer of the IC card is started when the first time-stamp is received. A second time-stamp is received, and a second value of the timer is read w…
- Who is the assignee on this patent?
- Veneroso Amedeo, Distasio Vitantonio, Varone Francesco, and 1 more
- What technology area does this patent fall under?
- Primary CPC classification G06K19/07. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Jan 19 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).