CN109391462B - Signal alignment method and device for side channel signals - Google Patents
Signal alignment method and device for side channel signals Download PDFInfo
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- CN109391462B CN109391462B CN201710667759.9A CN201710667759A CN109391462B CN 109391462 B CN109391462 B CN 109391462B CN 201710667759 A CN201710667759 A CN 201710667759A CN 109391462 B CN109391462 B CN 109391462B
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/002—Countermeasures against attacks on cryptographic mechanisms
- H04L9/003—Countermeasures against attacks on cryptographic mechanisms for power analysis, e.g. differential power analysis [DPA] or simple power analysis [SPA]
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Abstract
The method and the device for aligning side channel signals select a signal corresponding to a reference effective data segment from a first side channel signal or a second side channel signal to be aligned as a third side channel signal, then determine a first effective data segment adapted to the third side channel signal in a first signal starting region of the first side channel signal and a second effective data segment adapted to the third side channel signal in a second signal starting region of the second side channel signal, and finally perform signal alignment on the first side channel signal and the second side channel signal according to the first effective data segment and the second effective data segment. The signal alignment method and device for the side channel signal provided by the embodiment of the invention can realize accurate signal alignment of the side channel signal, and can ensure the integrity of the data of the side channel signal as much as possible, thereby improving the possibility of acquiring the secret key or the related secret information of the encrypted electronic equipment.
Description
Technical Field
The embodiment of the invention relates to the technical field of signal analysis, in particular to a signal alignment method and device for side channel signals.
Background
The side channel signal refers to a signal such as time consumption, power consumption or electromagnetic radiation leaked by the encrypted electronic device in the operation process, and a key or related secret information of the encrypted electronic device can be obtained through analysis of the side channel signal.
The analysis of the side channel signal is of crucial importance, for example, the manufacturer of the encrypted electronic device can determine the security of the encrypted electronic device by analyzing the side channel signal. To ensure the data integrity of the side channel signal, the side channel signal must be sampled in advance, so that some invalid noise signal is sampled before the valid side channel signal. Therefore, a signal alignment method for side channel signals is an urgent technical problem to be solved.
Disclosure of Invention
In view of this, embodiments of the present invention provide a method and an apparatus for aligning side channel signals, so as to solve the technical problem in the prior art that the side channel signals need to be aligned.
A first aspect of an embodiment of the present invention provides a method for aligning side channel signals, including:
acquiring a first side channel signal and a second side channel signal to be aligned;
determining a third side channel signal corresponding to a reference valid data segment in the first side channel signal or the second side channel signal;
determining a first valid data segment in a first signal starting region of the first side channel signal and determining a second valid data segment in a second signal starting region of the second side channel signal, wherein the first valid data segment and the second valid data segment are respectively adapted to the third side channel signal;
and performing signal alignment on the first side channel signal and the second side channel signal according to the first effective data segment and the second effective data segment.
Optionally, the signal aligning the first side channel signal and the second side channel signal according to the first valid data segment and the second valid data segment includes:
determining a first alignment position of the first valid data segment and determining a second alignment position of the second valid data segment; wherein the relative position of the first alignment position in the first valid data segment is the same as the relative position of the second alignment position in the second valid data segment;
aligning the first alignment position and the second alignment position to signal align the first side channel signal and the second side channel signal.
Optionally, the first alignment position is a first end position of the first valid data segment, and correspondingly, the second alignment position is a second end position of the second valid data segment;
or, the first alignment position is a first head end position of the first valid data segment, and correspondingly, the second alignment position is a second head end position of the second valid data segment.
Optionally, the determining a first valid data segment in a first signal start region of the first side channel signal and determining a second valid data segment in a second signal start region of the second side channel signal, where the first valid data segment and the second valid data segment are respectively adapted to the third side channel signal, includes:
aligning a first signal start point of the first signal start region and a second signal start point of the second signal start region to align the first side channel signal and the second side channel signal;
if the first signal starting point of the first signal starting area is aligned with the second signal starting point of the second signal starting area, determining a first effective data segment in the first signal starting area of the first side channel signal and determining a second effective data segment in the second signal starting area of the second side channel signal, wherein the first effective data segment and the second effective data segment are respectively adapted to the third side channel signal.
Optionally, the determining a third side channel signal corresponding to the reference valid data segment in the first side channel signal or the reference valid data segment in the second side channel signal includes:
determining a reference valid data segment of the first side channel signal or a reference valid data segment of the second side channel signal by pattern recognition;
and determining a side channel signal corresponding to the reference valid data segment as the third side channel signal.
A second aspect of the embodiments of the present invention provides a signal alignment method for side channel signals, including:
the acquisition module is used for acquiring a first side channel signal and a second side channel signal which are to be aligned;
a first determining module, configured to determine a third side channel signal corresponding to a reference valid data segment in the first side channel signal or the second side channel signal;
a second determining module, configured to determine a first valid data segment in a first signal start region of the first side channel signal and determine a second valid data segment in a second signal start region of the second side channel signal, where the first valid data segment and the second valid data segment are respectively adapted to the third side channel signal;
and the execution module is used for performing signal alignment on the first side channel signal and the second side channel signal according to the first effective data segment and the second effective data segment.
Optionally, the execution module is specifically configured to:
determining a first alignment position of the first valid data segment and determining a second alignment position of the second valid data segment; wherein the relative position of the first alignment position in the first valid data segment is the same as the relative position of the second alignment position in the second valid data segment;
aligning the first alignment position and the second alignment position to signal align the first side channel signal and the second side channel signal.
Alternatively,
the first alignment position is a first end position of the first valid data segment, and correspondingly, the second alignment position is a second end position of the second valid data segment;
or, the first alignment position is a first head end position of the first valid data segment, and correspondingly, the second alignment position is a second head end position of the second valid data segment.
Optionally, the second determining module is specifically configured to:
aligning a first signal start point of the first signal start region and a second signal start point of the second signal start region to align the first side channel signal and the second side channel signal;
if the first signal starting point of the first signal starting area is aligned with the second signal starting point of the second signal starting area, determining a first effective data segment in the first signal starting area of the first side channel signal and determining a second effective data segment in the second signal starting area of the second side channel signal, wherein the first effective data segment and the second effective data segment are respectively adapted to the third side channel signal.
Optionally, the first determining module is specifically configured to:
determining a reference valid data segment of the first side channel signal or a reference valid data segment of the second side channel signal by pattern recognition;
and determining a side channel signal corresponding to the reference valid data segment as the third side channel signal.
The method and the device for aligning side channel signals select a signal corresponding to a reference effective data segment from a first side channel signal or a second side channel signal to be aligned as a third side channel signal, then determine a first effective data segment adapted to the third side channel signal in a first signal starting region of the first side channel signal and a second effective data segment adapted to the third side channel signal in a second signal starting region of the second side channel signal, and finally perform signal alignment on the first side channel signal and the second side channel signal according to the first effective data segment and the second effective data segment. The signal alignment method and device for the side channel signal provided by the embodiment of the invention can realize accurate signal alignment of the side channel signal, and can ensure the integrity of the data of the side channel signal as much as possible, thereby improving the possibility of acquiring the secret key or the related secret information of the encrypted electronic equipment.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the embodiments of the present invention, and it is also possible for a person skilled in the art to obtain other drawings based on the drawings.
Fig. 1 is a flowchart of an alignment method of side channel signals according to an embodiment of the present invention.
Fig. 2 is a flowchart of an alignment method of side channel signals according to another embodiment of the present invention.
Fig. 3 is a schematic structural diagram of an alignment apparatus for side channel signals according to an embodiment of the present invention.
Fig. 4 is an initial state diagram of a first side channel signal and a second side channel signal according to an embodiment of the present invention.
Fig. 5 is a diagram of the changing states of the first side channel signal and the second side channel signal according to an embodiment of the invention.
Fig. 6 is an alignment state diagram of a first side channel signal and a second side channel signal according to an embodiment of the present invention.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments obtained by a person skilled in the art based on the embodiments of the present invention shall fall within the scope of the protection of the embodiments of the present invention.
The following further describes specific implementation of the embodiments of the present invention with reference to the drawings.
Fig. 1 is a flowchart of a signal alignment method of side channel signals according to an embodiment of the present invention. Referring to fig. 1, a method for aligning side channel signals according to an embodiment of the present invention includes:
step S101, acquiring a first side channel signal 1 and a second side channel signal 2 to be aligned.
In particular, the ultimate purpose of acquiring the side channel signal is to acquire a key or related secret information of the encrypted electronic device through signal analysis of the side channel signal. For this reason, the more complete the data of the acquired side channel signal, the greater the possibility of acquiring the key or the related secret information of the encrypted electronic device. In actual operation, the acquisition of the side channel signal is started as soon as the encryption electronic device is operated, and even the detection of the acquisition of the side channel signal is performed earlier than the operation time of the encryption electronic device. This results in an invalid noise signal in the signal start region of the side channel signal. Referring to fig. 4, a large amount of invalid noise signals exist in the first signal start region 4 of the first side channel signal 1, and similarly, a large amount of invalid noise signals exist in the second signal start region 5 of the second side channel signal 2.
Step S102, determining a third side channel signal 3 corresponding to the effective data segment in the first side channel signal 1 or the reference effective data segment in the second side channel signal 2.
Specifically, when performing signal alignment on the first side channel signal 1 and the second side channel signal 2, a specific position of the null noise signal in the entire side channel signal is determined. Due to the diversity of the causes of the invalid noise signals, such as inaccurate positioning of the signal sampling start time, internal clock drift and other factors, the specific position of the invalid noise signal in the signal start area is difficult to determine. When the encrypted electronic equipment normally operates, the signal corresponding to the effective data section of the side channel signal is expressed as a regular normal periodic signal, and is different from the disorder expressed by the ineffective noise signal. Referring to fig. 4, the null noise signal 41 in the first signal start region 4 of the first side channel signal 1 appears as a hash; the null noise signal 51 in the second signal start region 5 of the second side-channel signal 2 appears as a hash; signals corresponding to the valid data segment of the first side channel signal 1 are represented as periodic signals, and signals corresponding to the valid data segment of the second side channel signal 2 are represented as periodic signals. Therefore, in this embodiment, one effective data segment is selected from the limited data segments appearing as periodic signals in the first side channel signal 1 or the second side channel signal 2 as a reference effective data segment, a signal corresponding to the reference effective data segment is used as the third side channel signal 3, and then the effective data segment adapted to the third side channel signal 3 is determined in the first signal start region 4 of the first side channel signal 1 and the second signal start region 5 of the second side channel signal 2, so as to determine the specific position of the invalid noise signal of the side channel signal.
Step S103, determining a first valid data segment in a first signal start region 4 of the first side channel signal 1, and determining a second valid data segment in a second signal start region 5 of the second side channel signal 2, where the first valid data segment and the second valid data segment are respectively adapted to the third side channel signal 3.
Specifically, the third side channel signal 3 is a reference template, the valid data segment adapted to the third side channel signal 3 is determined in the signal starting region of the first side channel signal 1 and the second side channel signal 2, and after the valid data segment in the signal starting region of the side channel signal is determined, the invalid noise signal in the signal starting region of the side channel signal can be determined simply and quickly. Referring to fig. 5, the first valid data segment 42 of the third side channel signal 3 is adapted in the first signal start area 4 of the first side channel signal 1, signals corresponding to data segments preceding the first valid data segment 42 are all determined to be invalid noise signals in the first signal start area 4 of the first side channel signal 1, the second valid data segment 52 of the third side channel signal 3 is adapted in the second signal start area 5 of the second side channel signal 2, and signals corresponding to data segments preceding the second valid data segment 52 are all determined to be invalid noise signals in the second signal start area 5 of the second side channel signal 2.
Step S104, performing signal alignment on the first side channel signal 1 and the second side channel signal 2 according to the first effective data segment and the second effective data segment.
Specifically, according to the above statements, after determining the valid data segment in the signal start region of the side channel signal, the invalid noise signal in the signal start region of the side channel signal can be simply and quickly determined, i.e., the specific position of the invalid noise signal of the side channel signal is determined. When the first side channel signal 1 and the second side channel signal 2 are aligned, the data segment where the invalid noise signal is located is avoided, and the whole first side channel signal 1 and the whole second side channel signal 2 are aligned by aligning the first valid data segment and the second valid data segment. In addition, the first valid data segment 42 and the second valid data segment 52 of the present embodiment are both determined in the signal start region of the corresponding side channel signal, i.e., the determined first valid data segment 42 and the determined second valid data segment 52 are both first-appearing valid data segments of the corresponding side channel signal. Therefore, on the premise of meeting accurate signal alignment, the integrity of data of side channel signals can be ensured as much as possible, and the possibility of acquiring the secret key or related secret information of the encrypted electronic equipment is further improved.
In the method for aligning side channels provided in the embodiment of the present invention, a signal corresponding to a reference valid data segment is selected from the acquired first side channel signal 1 or second side channel signal 2 to be signal-aligned to be used as the third side channel signal 3, then a first valid data segment 42 adapted to the third side channel signal 3 is determined in a first signal start area 4 of the first side channel signal 1, a second valid data segment 52 adapted to the third side channel signal 3 is determined in a second signal start area 5 of the second side channel signal 2, and finally, signal alignment is performed on the first side channel signal 1 and the second side channel signal 2 according to the first valid data segment 42 and the second valid data segment 52. The signal alignment method of the side channel signal provided by the embodiment of the invention can realize accurate signal alignment of the side channel signal, and in addition, the integrity of the data of the side channel signal can be ensured as much as possible, thereby improving the possibility of acquiring the secret key or the related secret information of the encrypted electronic equipment.
Fig. 2 is a flowchart of a signal alignment method of a side channel according to another embodiment of the present invention. Referring to fig. 2, a method for aligning signals of side channels according to an embodiment of the present invention includes:
step S201, obtaining a first side channel signal 1 and a second side channel signal 2 to be aligned.
It should be noted that step S201 in this embodiment is the same as step S101 in the above embodiment, and is not described herein again.
Step S202, determining a reference effective data segment in the first side channel signal 1 or a reference effective data segment in the second side channel signal 2 through pattern recognition; and determining the side channel signal corresponding to the reference valid data segment as the third side channel signal 3.
For example, by using the pattern recognition method, one of the limited data segments appearing as periodic signals in the first side channel signal 1 or the second side channel signal 2 is recognized as a reference valid data segment, and a signal corresponding to the reference valid data segment is recognized as the third side channel signal 3.
Step S203, aligning a first start point of the first signal start region 4 and a second start point of the second signal start region 5 to align the first side channel signal 1 and the second side channel signal 2, and performing step S204.
Specifically, referring to fig. 5, due to different sampling start times or other factors, the start points of the first side channel signal 1 and the second side channel signal 2 are not coincident, and therefore, the first side channel signal 1 and the second side channel signal 2 are aligned before determining the valid data segment in the signal start area of the side channel signal. The alignment of the first side channel signal 1 and the second side channel signal 2 is achieved in particular by aligning a first starting point 43 of a first signal starting area 4 of the first side channel signal 1 and a second starting point 53 of a second signal starting area 5 of the second side channel signal 2.
Step S204, if the first signal start point 43 of the first signal start area 4 and the second signal start point 53 of the second signal start area 5 are aligned, determining a first valid data segment in the first signal start area 4 of the first side channel signal 1 and determining a second valid data segment in the second signal start area 5 of the second side channel signal 2, where the first valid data segment and the second valid data segment are respectively adapted to the third side channel signal 3, and performing step S205.
Referring to fig. 5, the first start point 43 of the first signal start area 4 of the first side channel signal 1 and the second start point 53 of the second signal start area 5 of the second side channel signal 2 are aligned, and the first valid data segment 42 adapted to the third side channel signal 3 is determined in the first signal start area 44 of the first side channel signal 1, and the second valid data segment 52 adapted to the third side channel signal 3 is determined in the second signal start area 55 of the second side channel signal 2. For example, by using the third side channel signal 3 as a reference template, the first valid data segment 42 adapted to the third side channel signal 3 is determined in the first signal start region 44 of the first side channel signal 1, and the second valid data segment 52 adapted to the third side channel signal 3 is determined in the second signal start region 55 of the second side channel signal 2 by a pattern recognition method.
Step S206 is performed by determining a first alignment position of the first valid data segment 42 and determining a second alignment position of the second valid data segment 52 in step S205.
Specifically, the principle of determining the first alignment position and the second alignment position is that the relative position of the first alignment position in the first valid data segment is the same as the relative position of the second alignment position in the second valid data segment. For example, in one possible implementation, the first alignment position is the first end position 44 of the first valid data segment 42, and correspondingly, the second alignment position 52 is the second end position 54 of the second valid data segment. In yet another possible implementation manner, the first alignment position is a first head end position 45 of the first valid data segment 44, and correspondingly, the second alignment position is a second head end position 55 of the second valid data segment 53. Referring to fig. 6, the first selected alignment position is the first end position 44 and the second selected alignment position is the second end position 54, but not limited thereto. The present embodiment ensures more accurate signal alignment of the first side channel signal 1 and the second side channel signal 2 by ensuring that the relative position of the first alignment position in the first valid data segment 42 is the same as the relative position of the second alignment position in the second valid data segment 52.
Step S206, aligning the first alignment position and the second alignment position to perform signal alignment on the first side channel signal 1 and the second side channel signal 2.
Specifically, referring to fig. 6, when the first alignment position and the second alignment position are aligned, signal alignment of the first side channel signal 1 and the second side channel signal 2 is achieved.
According to the signal alignment method of the side channel signal provided by the embodiment of the invention, the first effective data segment 42 in the first signal starting region 4 of the first side channel signal 1 and the second effective data segment 52 in the second signal starting region 5 of the second side channel signal 2 can be accurately determined by a mode identification method; and determining the first alignment position and the second alignment position according to the principle that the relative position of the first alignment position in the first valid data segment 42 is the same as the relative position of the second alignment position in the second valid data segment 52, thereby ensuring that the first side channel signal 1 and the second side channel signal 2 are more accurately aligned.
Fig. 3 is a schematic structural diagram of an alignment apparatus for side channel signals according to an embodiment of the present invention. As shown in fig. 3, the apparatus for aligning side channel signals according to the embodiment of the present invention includes:
an obtaining module 01, configured to obtain a first side channel signal 1 and a second side channel signal 2 to be signal aligned;
a first determining module 02, configured to determine a third side channel signal 3 corresponding to a reference valid data segment in the first side channel signal 1 or a reference valid data segment in the second side channel signal 2;
a second determining module 03, configured to determine a first valid data segment 42 in a first signal start area 4 of the first side channel signal 1 and a second valid data segment 52 in a second signal start area 5 of the second side channel signal 2, where the first valid data segment 42 and the second valid data segment 52 are respectively adapted to the third side channel signal 3;
an execution module 04, configured to perform signal alignment on the first side channel signal 1 and the second side channel signal 2 according to the first valid data segment 42 and the second valid data segment 52.
Further, the execution module is specifically configured to:
determining a first alignment position of the first valid data segment 42 and determining a second alignment position of the second valid data segment 52; wherein the relative position of the first alignment position in the first valid data segment 42 is the same as the relative position of the second alignment position in the second valid data segment 52;
aligning the first alignment position and the second alignment position to signal align the first side channel signal 1 and the second side channel signal 2.
Further, the first alignment position is a first end position 44 of the first valid data segment 42, and correspondingly, the second alignment position is a second end position 54 of the second valid data segment 52;
alternatively, the first alignment position is a first head end position 45 of the first payload data segment 42, and correspondingly, the second alignment position is a second head end position 55 of the second payload data segment 52.
Further, the second determining module is specifically configured to:
aligning a first signal start point of the first signal start area 4 and a second signal start point of the second signal start area 5 to align the first side channel signal and the second side channel signal;
if the first signal start point of the first signal start area 4 and the second signal start point of the second signal start area 5 are aligned, a first valid data segment 42 in the first signal start area 4 of the first side channel signal 1 and a second valid data segment 52 in the second signal start area 5 of the second side channel signal 2 are determined, and the first valid data segment 42 and the second valid data segment 52 are respectively adapted to the third side channel signal 3.
Further, the first determining module is specifically configured to: determining a reference valid data segment in the first side channel signal 1 or the second side channel signal 2 through pattern recognition;
and determining the side channel signal corresponding to the reference valid data segment as the third side channel signal 3.
It should be noted that, regarding the apparatus in the present embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated herein.
In the side channel signal alignment apparatus provided in the embodiment of the present invention, a signal corresponding to a reference valid data segment is selected from the acquired first side channel signal 1 or second side channel signal 2 to be signal aligned as the third side channel signal 3, then a first valid data segment adapted to the third side channel signal 3 is determined in the first signal start area 4 of the first side channel signal 1, a second valid data segment adapted to the third side channel signal 3 is determined in the second signal start area 5 of the second side channel signal 2, and finally, signal alignment is performed on the first side channel signal 1 and the second side channel signal 2 according to the first valid data segment and the second valid data segment. The signal alignment device of the side channel provided by the embodiment of the invention can realize accurate signal alignment of the side channel signal, and in addition, the integrity of the data of the side channel signal can be ensured as much as possible, thereby improving the possibility of acquiring the secret key or the related secret information of the encrypted electronic equipment.
Of course, it is not necessary for any particular embodiment of the invention to achieve all of the above advantages at the same time.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the embodiments of the invention. It will be apparent to those skilled in the art that various modifications and variations can be made in the embodiments of the present invention without departing from the spirit or scope of the embodiments of the invention. Thus, if such modifications and variations of the embodiments of the present invention fall within the scope of the claims of the embodiments of the present invention and their equivalents, the embodiments of the present invention are also intended to encompass such modifications and variations.
Claims (10)
1. A method for signal alignment of a side channel signal, comprising:
acquiring a first side channel signal and a second side channel signal to be aligned;
determining a third side channel signal corresponding to a reference effective data segment in the first side channel signal or the second side channel signal;
the reference effective data segment is one of the data segments selected from the limited data segments which are presented as periodic signals in the first side channel signal or the second side channel signal, and a signal corresponding to the reference effective data segment is used as a third side channel signal;
determining a first valid data segment in a first signal starting region of the first side channel signal and determining a second valid data segment in a second signal starting region of the second side channel signal, wherein the first valid data segment and the second valid data segment are respectively adapted to the third side channel signal;
the signals corresponding to the effective data section of the side channel signals are regular normal periodic signals; the signal starting area is a section of area at the beginning of the signal data section;
and performing signal alignment on the first side channel signal and the second side channel signal according to the first effective data segment and the second effective data segment.
2. The method of claim 1, wherein signal aligning the first side channel signal and the second side channel signal according to the first valid data segment and the second valid data segment comprises:
determining a first alignment position of the first valid data segment and determining a second alignment position of the second valid data segment; wherein the relative position of the first alignment position in the first valid data segment is the same as the relative position of the second alignment position in the second valid data segment;
aligning the first alignment position and the second alignment position to signal align the first side channel signal and the second side channel signal.
3. The method of claim 2,
the first alignment position is a first end position of the first valid data segment, and correspondingly, the second alignment position is a second end position of the second valid data segment;
or, the first alignment position is a first head end position of the first valid data segment, and correspondingly, the second alignment position is a second head end position of the second valid data segment.
4. The method of claim 1, wherein determining a first valid data segment in a first signal start region of the first side channel signal and determining a second valid data segment in a second signal start region of the second side channel signal, wherein the first valid data segment and the second valid data segment are respectively adapted to the third side channel signal comprises:
aligning a first signal start point of the first signal start region and a second signal start point of the second signal start region to align the first side channel signal and the second side channel signal;
if the first signal starting point of the first signal starting area is aligned with the second signal starting point of the second signal starting area, determining a first effective data segment in the first signal starting area of the first side channel signal and determining a second effective data segment in the second signal starting area of the second side channel signal, wherein the first effective data segment and the second effective data segment are respectively adapted to the third side channel signal.
5. The method of claim 1, wherein determining a third side channel signal corresponding to the reference valid data segment in the first side channel signal or the reference valid data segment in the second side channel signal comprises:
determining a reference valid data segment of the first side channel signal or a reference valid data segment of the second side channel signal by pattern recognition;
and determining a side channel signal corresponding to the reference valid data segment as the third side channel signal.
6. An apparatus for aligning side channel signals, comprising:
the acquisition module is used for acquiring a first side channel signal and a second side channel signal which are to be aligned;
a first determining module, configured to determine a third side channel signal corresponding to a reference valid data segment in the first side channel signal or the second side channel signal; the reference effective data segment is one of the data segments selected from the limited data segments which are presented as periodic signals in the first side channel signal or the second side channel signal, and a signal corresponding to the reference effective data segment is used as a third side channel signal;
a second determining module, configured to determine a first valid data segment in a first signal start region of the first side channel signal and determine a second valid data segment in a second signal start region of the second side channel signal, where the first valid data segment and the second valid data segment are respectively adapted to the third side channel signal; the signals corresponding to the effective data section of the side channel signals are regular normal periodic signals; the signal starting area is a section of area at the beginning of the signal data section;
and the execution module is used for performing signal alignment on the first side channel signal and the second side channel signal according to the first effective data segment and the second effective data segment.
7. The apparatus of claim 6, wherein the execution module is specifically configured to:
determining a first alignment position of the first valid data segment and determining a second alignment position of the second valid data segment; wherein the relative position of the first alignment position in the first valid data segment is the same as the relative position of the second alignment position in the second valid data segment;
aligning the first alignment position and the second alignment position to signal align the first side channel signal and the second side channel signal.
8. The apparatus of claim 7,
the first alignment position is a first end position of the first valid data segment, and correspondingly, the second alignment position is a second end position of the second valid data segment;
or, the first alignment position is a first head end position of the first valid data segment, and correspondingly, the second alignment position is a second head end position of the second valid data segment.
9. The apparatus of claim 6, wherein the second determining module is specifically configured to:
aligning a first signal start point of the first signal start region and a second signal start point of the second signal start region to align the first side channel signal and the second side channel signal;
if the first signal starting point of the first signal starting area is aligned with the second signal starting point of the second signal starting area, determining a first effective data segment in the first signal starting area of the first side channel signal and determining a second effective data segment in the second signal starting area of the second side channel signal, wherein the first effective data segment and the second effective data segment are respectively adapted to the third side channel signal.
10. The apparatus of claim 6, wherein the first determining module is specifically configured to:
determining a reference valid data segment of the first side channel signal or a reference valid data segment of the second side channel signal by pattern recognition;
and determining a side channel signal corresponding to the reference valid data segment as the third side channel signal.
Priority Applications (1)
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4868851A (en) * | 1988-01-26 | 1989-09-19 | Harris Corporation | Signal processing apparatus and method |
| CN102394823A (en) * | 2011-11-03 | 2012-03-28 | 中兴通讯股份有限公司 | Multi-channel aligning de-bias method and device |
| CN103581986A (en) * | 2012-07-30 | 2014-02-12 | 京信通信系统（中国）有限公司 | Channel detection method and device |
| CN106712926A (en) * | 2016-11-21 | 2017-05-24 | 中国信息安全测评中心 | Signal processing method and apparatus |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2382623B1 (en) * | 2009-01-26 | 2013-11-20 | Telefonaktiebolaget LM Ericsson (publ) | Aligning scheme for audio signals |
-
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4868851A (en) * | 1988-01-26 | 1989-09-19 | Harris Corporation | Signal processing apparatus and method |
| CN102394823A (en) * | 2011-11-03 | 2012-03-28 | 中兴通讯股份有限公司 | Multi-channel aligning de-bias method and device |
| CN103581986A (en) * | 2012-07-30 | 2014-02-12 | 京信通信系统（中国）有限公司 | Channel detection method and device |
| CN106712926A (en) * | 2016-11-21 | 2017-05-24 | 中国信息安全测评中心 | Signal processing method and apparatus |
Non-Patent Citations (1)
| Title |
|---|
| 差分功率分析攻击中的信号处理与分析;张鹏;《微电子学与计算机》;20091130;全文 * |
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