CN103118029A - Synchronized method and device of encrypted messages between each other - Google Patents
Synchronized method and device of encrypted messages between each other Download PDFInfo
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- CN103118029A CN103118029A CN2013100530639A CN201310053063A CN103118029A CN 103118029 A CN103118029 A CN 103118029A CN 2013100530639 A CN2013100530639 A CN 2013100530639A CN 201310053063 A CN201310053063 A CN 201310053063A CN 103118029 A CN103118029 A CN 103118029A
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Abstract
The invention discloses a synchronized method and device of encrypted messages between each other, and relates to the field of digital information transmission. The method includes steps of determining whether to stamp an indicating signage of time according to a message content before being encrypted, and generating a first sending time stamp t3 corresponding to a message sending time at the corresponding encrypted message while sending a message; generating a first receiving time stamp t2 corresponding to a message receiving time at the received message, and deciphering the received encrypted message while receiving the message; performing time synchronization by using the first sending time stamp t3, the first receiving time stamp t2 and a second receiving time stamp t4 of the corresponding encrypted message received by a master clock node and a second sending time stamp t1 of sending the message. The synchronized method and device of encrypted messages improves time synchronization accuracy of master and slave clock nodes on the premise of guaranteeing data network security.
Description
Technical field
The present invention relates to the transmission field of digital information, particularly a kind of encryption message passes method for synchronizing time and device mutually.
Background technology
The high-precision requirement of time synchronized is proposed by its parts in the packet switching system of digital information transmission.The time-pulse generator of these parts often by asynchronous network each other the free marking of exchange zone packet or can realize synchronous through the generator of the reference time that asynchronous network arrives by one.
Internet protocol-based IP(IP:Internet Protocol) time synchronization protocol that passes mutually of message has so-called Precision Time Protocol PTP(PTP:Precision Time Protocol), NTP (Network Time Protocol) NTP(NTP:Network time Protocol) and the non-well-known protocol of amplification thus etc.
Take the PTP agreement as example, message is divided into event message and common message.Synchronization message and time-delay request message are event messages, master clock node and can generation time stamp (being designated as t1, t2, t3 and t4) during to this two kinds of event messages at sending and receiving from clock node.Synchronously following message and time-delay response message is responsible for the timestamp of master clock node generation is passed to from clock node.After collecting all timestamps from clock node, just can determine the time deviation with the master clock node, thereby adjust local clock, finally realize the time synchronized of main and subordinate node.Realize that schematic diagram as shown in Figure 1.
The sync message that passes mutually based on IP is geographical and use in limited network or the network segment in logic, make sync message to use in having the network of a large number of users, but also therefore have the hidden danger such as problem of data safety, industry has proposed to guarantee by various encryption technologies the fail safe of synchronization message.
The method that is used for the transmitting-receiving time of definite sync message has usually: 1) use software to beat the stamp mode; 2) sync message is not walked encryption tunnel, resolves sync message and determines the transmitting-receiving time near physical layer; 3) increase the encryption and decryption processing unit before hardware is beaten the stamp unit, namely determine transmitting time before sync message is encrypted, definite time of reception after the sync message deciphering.First kind of way causes timing tracking accuracy not high due to the limitation of software timing itself; The second way has Information Security, is not suitable for the scene that sync message is encrypted; The third mode cost is high, and the processing time-delay of encryption and decryption process introducing has reduced the precision of time synchronized.
More existing propositions at present are used for determining the method for encryption synchronisation message time of reception in addition, but these methods can only solve the clock synchronization issue between master-salve clock, can't realize time synchronized.
The present invention proposes a kind of under the prerequisite that guarantees data security, and obtains the transmitting-receiving time of encryption synchronisation message, realizes from high-precision method for synchronizing time and system between clock and master clock.
Summary of the invention
The object of the present invention is to provide a kind of encryption message to pass mutually method for synchronizing time and device, under the prerequisite that guarantees data security, obtain the transmitting-receiving time of encrypting message, realized from high-precision time synchronized between clock and master clock.
According to an aspect of the present invention, provide a kind of encryption message to pass mutually method for synchronizing time, comprised the following steps:
When sending message, according to the sign of whether beating timestamp of determining based on message content before encrypting, produce on the corresponding message after encryption corresponding to the first transmitting time stamp t3 that sends the message time;
When the reception message, produce on all messages that receive corresponding to the first time of reception that receives the message time and stab t2, and decipher the corresponding message after the encryption of receiving;
The second transmitting time stamp t1 that the second time of reception that utilizes described the first transmitting time stamp t3, the first time of reception to stab the corresponding message after t2 and the described encryption of master clock node reception stabs t4 and transmission message carries out time synchronized.
Preferably, described when sending message, according to the sign of whether beating timestamp of determining based on message content before encrypting, the step that produces on the corresponding message after encryption corresponding to the first transmitting time stamp t3 that sends the message time is specially:
When sending message, encrypt message from clock node, and by determining that whether encrypt front message comprises the time-delay request message, produces and beats the timestamp sign or do not beat the timestamp sign;
, produce on the corresponding message after encryption corresponding to the first transmitting time stamp t3 that sends the message time according to the described timestamp sign of beating from clock node;
Wherein said corresponding message refers to comprise the message of request message of delaying time.
Preferably, encrypt message from clock node, and whether comprise the time-delay request message by the message before determining to encrypt, produce the step of beating the timestamp sign or not beating the timestamp sign and be specially:
If the message before determining to encrypt comprises the time-delay request message, produce on the message before encryption and beat the timestamp sign;
If the message before determining to encrypt does not comprise the time-delay request message, produce on the message before encryption and do not beat the timestamp sign.
Preferably, described when receiving message, produce on all messages that receive corresponding to the first time of reception stamp t2 that receives the message time, and the step of the corresponding message after the deciphering encryption of receiving is specially:
When receiving message, produce corresponding to the first time of reception stamp t2 that receives the message time at all messages that receive from clock node;
Corresponding message after the encryption that will receive from clock node is decrypted according to enciphering and deciphering algorithm.
Corresponding message after the encryption that preferably, will receive from clock node is specially according to the step that enciphering and deciphering algorithm is decrypted:
Corresponding message after the encryption that will receive from clock node is decrypted according to enciphering and deciphering algorithm, and determines to comprise synchronization message in message after deciphering.
Preferably, described master clock node the second time of reception stamp t4 of receiving the corresponding message after described encryption is carried at the master clock node and sends to from the time-delay response message of clock node.
Preferably, described master clock node the second transmitting time stamp t1 of sending message is carried at the master clock node and sends to from the synchronization message of clock node or synchronously follow message.
According to a further aspect in the invention, provide a kind of encryption message to pass mutually time synchronism apparatus, having comprised:
The first transmitting time stamp t3 generation module is used for when sending message, according to the sign of whether beating timestamp of determining based on message content before encrypting, produces on the corresponding message after encryption corresponding to the first transmitting time stamp t3 that sends the message time;
The first time of reception stabs the t2 generation module, is used for when the reception message, produces the first time of reception stamp t2 corresponding to the reception message time on all messages that receive, and deciphers the corresponding message after the encryption of receiving;
The time synchronized module, the second transmitting time stamp t1 that stabs t4 and transmission message for the second time of reception that utilizes described the first transmitting time stamp t3, the first time of reception to stab the corresponding message after t2 and the described encryption of master clock node reception carries out time synchronized.
Preferably, also comprise protocol process module, be used for encrypting message when sending message, and by determining whether encrypt front message comprises the time-delay request message, produce and beat the timestamp sign or do not beat the timestamp sign, so that the first transmitting time stamp t3 generation module according to the described timestamp sign of beating, produces on the corresponding message after encryption corresponding to the first transmitting time stamp t3 that sends the message time.
Preferably, described protocol process module comprises:
Ciphering unit is used for encrypting the message that sends from clock node;
Decrypting device is used for the corresponding message after encryption that deciphering receives from clock node; And
The sign generation unit is beaten the timestamp sign or is not beaten the timestamp sign for generation of described.
Compared with prior art, beneficial effect of the present invention is:
1, determining the transmitting-receiving time of sync message near physical layer side, need not increases new hardware and line, reduces costs and implementation complexity;
2, the do not take time content of stamp unit identification message has been simplified handling process;
3, strengthened data network security and improved the timing tracking accuracy of master-salve clock node.
Description of drawings
Fig. 1 is the time synchronized schematic flow sheet of the packet switching system time-based marking that provides of prior art;
Fig. 2 is a kind of flow chart that message passes method for synchronizing time mutually of encrypting provided by the invention;
Fig. 3 is a kind of schematic diagram that message passes time synchronism apparatus mutually of encrypting provided by the invention;
Fig. 4 is provided in the packet switching system that provides of the embodiment of the present invention by the schematic diagram of time synchronism apparatus;
Fig. 5 be the embodiment of the present invention provide realize one of discrete component schematic diagram of time synchronized;
Fig. 6 is two of the discrete component schematic diagram of realizing time synchronized that provides of the embodiment of the present invention.
Embodiment
To a preferred embodiment of the present invention will be described in detail, should be appreciated that following illustrated preferred embodiment only is used for description and interpretation the present invention, is not intended to limit the present invention below in conjunction with accompanying drawing.
Fig. 2 is a kind of flow chart that message passes method for synchronizing time mutually of encrypting provided by the invention, as shown in Figure 2, comprises the following steps:
Step S201: when sending message, according to the sign of whether beating timestamp of determining based on message content before encrypting, produce on the corresponding message after encryption corresponding to the first transmitting time stamp t3 that sends the message time;
Step S202: when the reception message, produce on all messages that receive corresponding to the first time of reception that receives the message time and stab t2, and decipher the corresponding message after the encryption of receiving;
Step S203: the second transmitting time stamp t1 that the second time of reception that utilizes described the first transmitting time stamp t3, the first time of reception to stab the corresponding message after t2 and the described encryption of master clock node reception stabs t4 and transmission message carries out time synchronized.
Specifically, described when sending message, according to the sign of whether beating timestamp of determining based on message content before encrypting, be specially in the step that produces on the corresponding message after encryption corresponding to the first transmitting time stamp t3 that sends the message time: when sending message, encrypt message from clock node, and by determining that whether encrypt front message comprises the time-delay request message, produces and beats the timestamp sign or do not beat the timestamp sign; , produce on the corresponding message after encryption corresponding to the first transmitting time stamp t3 that sends the message time according to the described timestamp sign of beating from clock node; Wherein said corresponding message refers to comprise the message of request message of delaying time.
The present invention encrypts message from clock node, and by determining whether encrypt front message comprises the time-delay request message, producing the step beat the timestamp sign or not beat the timestamp sign is specially: if the message before determining to encrypt comprises the time-delay request message, on the message before encryption, the timestamp sign is beaten in generation; If the message before determining to encrypt does not comprise the time-delay request message, produce on the message before encryption and do not beat the timestamp sign.
Specifically, described when receiving message, produce on all messages that receive corresponding to the first time of reception stamp t2 that receives the message time, and the step of deciphering the corresponding message after the encryption of receiving is specially: when receiving message, produce corresponding to the first time of reception that receives the message time at all messages that receive from clock node and stab t2; Corresponding message after the encryption that will receive from clock node is decrypted according to enciphering and deciphering algorithm.
Corresponding message after the encryption that will receive from clock node is specially according to the step that enciphering and deciphering algorithm is decrypted: the corresponding message after the encryption that will receive from clock node is decrypted according to enciphering and deciphering algorithm, and determines to comprise synchronization message in message after deciphering.
The second time of reception stamp t4 of the corresponding message after the described encryption of described master clock node reception is carried at the master clock node and sends to from the time-delay response message of clock node.
The second transmitting time stamp t1 of described master clock node transmission message is carried at the master clock node and sends to from the synchronization message of clock node or synchronously follow message.
Fig. 3 has shown a kind of schematic diagram that message passes time synchronism apparatus mutually of encrypting provided by the invention, as shown in Figure 3, comprise: the first transmitting time stamp t3 generation module 301, be used for when sending message, according to the sign of whether beating timestamp of determining based on message content before encrypting, produce on the corresponding message after encryption corresponding to the first transmitting time stamp t3 that sends the message time; The first time of reception stabs t2 generation module 302, is used for when the reception message, produces the first time of reception stamp t2 corresponding to the reception message time on all messages that receive, and deciphers the corresponding message after the encryption of receiving; Time synchronized module 303, the second transmitting time stamp t1 that stabs t4 and transmission message for the second time of reception that utilizes described the first transmitting time stamp t3, the first time of reception to stab the corresponding message after t2 and the described encryption of master clock node reception carries out time synchronized.
The present invention also comprises protocol process module, be used for encrypting message when sending message, and by determining whether encrypt front message comprises the time-delay request message, produce and beat the timestamp sign or do not beat the timestamp sign, so that the first transmitting time stamp t3 generation module according to the described timestamp sign of beating, produces on the corresponding message after encryption corresponding to the first transmitting time stamp t3 that sends the message time.
Described protocol process module comprises: ciphering unit is used for encrypting the message that sends from clock node; Decrypting device is used for the corresponding message after encryption that deciphering receives from clock node; And the sign generation unit, beat the timestamp sign or do not beat the timestamp sign for generation of described.
Fig. 4 has shown the schematic diagram of realizing time synchronism apparatus in the packet switching system that the embodiment of the present invention provides, as shown in Figure 4, comprises Ethernet data Transmit-Receive Unit, timestamp unit, protocol processing unit and algorithm process unit.When sending message, whether described protocol processing unit comprises the time-delay request message according to the message before encrypting, and produces and beats the timestamp sign and pass to the timestamp unit together with encrypting message if comprise the time-delay request message; Described timestamp unit judges whether that according to beating the timestamp sign needs beat timestamp, and the passback timestamp arrives protocol processing unit; The timestamp unit is passed to the Ethernet data Transmit-Receive Unit to the encryption Ethernet message that protocol processing unit sends; Simultaneously protocol processing unit is passed to the algorithm process unit to timestamp again.When receiving message, when described timestamp unit inspection passed the message lead code of coming to the Ethernet data Transmit-Receive Unit, logging timestamp was passed to protocol processing unit; After the protocol processing unit decrypted message, by certain corresponding relation, timestamp and corresponding synchronization message are passed to the algorithm process unit; Carry out Time synchronization algorithm in the algorithm process unit at last, realize the master-salve clock time synchronized.
Below in conjunction with Fig. 4, the information interaction of each intermodule in apparatus of the present invention embodiment is described in detail, specifically comprises:
S401: sending Ethernet message direction from clock toward master clock, whether described protocol processing unit comprises the time-delay request message according to message before encrypting, and whether produce this message needs to beat the stamp sign; After encrypting, message and beating stabs sign and passes to together the timestamp unit;
S402: the message that protocol processing unit is come is received in described timestamp unit, stab sign according to beating of step S401 generation, judge whether to need to beat timestamp (note is t3), if need to beat stamp t3 and corresponding time-delay request message returned to protocol processing unit, otherwise being left intact;
S403: described timestamp unit is passed to the Ethernet data Transmit-Receive Unit to the encryption Ethernet message that protocol processing unit sends;
S404: described protocol processing unit is passed to the algorithm process unit to t3 and corresponding time-delay request message;
S405: receiving master clock Ethernet message direction from clock, described Ethernet data Transmit-Receive Unit the Ethernet message transmissions to the timestamp unit; Described timestamp unit preventive maintenance time stamp timer, with the clock of local clock homology as triggering;
S406: described timestamp unit the Ethernet data Transmit-Receive Unit is come all encrypt all logging timestamps (being designated as t2) of Ethernet messages, pass to protocol processing unit;
S407: described protocol processing unit judges to encrypting after message is decrypted whether message comprises synchronization message, if comprise, t2 and synchronization message is passed to the algorithm process unit together, otherwise abandons t2;
S408: described algorithm process unit by using t2, t3 and master clock send to from the synchronization message of clock or synchronously follow the t1 and the master clock that carry message and send to the t4 that carries from the time-delay response message of clock, carry out Time synchronization algorithm.
By the information interaction of above each intermodule, obtained synchronized algorithm required time stamp from clock, thereby and realized time synchronized based on mutual biography of encryption IP message between master clock.
Fig. 5 and Fig. 6 are respectively the discrete component schematic diagrames of realizing time synchronized that the embodiment of the present invention provides, as shown in Figure 5, comprise ethernet physical layer PHY(physical) chip, programmable logic device and central processor CPU (CPU:Central Processing Unit).Timestamp unit described in Fig. 4, protocol processing unit and algorithm process unit can be to make up realization by discrete device, wherein said ethernet PHY chip is as the Ethernet data Transmit-Receive Unit, programmable logic device is realized the timestamp cell processing, and CPU realizes protocol processing unit and algorithm process unit.As shown in Figure 6, comprise ethernet PHY chip and on-chip system chip SOC(SOC:System On Chip).The combination of the timestamp unit described in Fig. 4, protocol processing unit and algorithm process unit can be also by realizing on SOC (system on a chip) SOC, and described ethernet PHY chip is as the Ethernet data Transmit-Receive Unit.
In sum, the present invention has following technique effect:
1, determining the transmitting-receiving time of sync message near physical layer side, need not increases new hardware and line, reduces costs and implementation complexity;
2, the do not take time content of stamp unit identification message has been simplified handling process;
3, strengthened data network security and improved the timing tracking accuracy of master-salve clock node.
Although above the present invention is had been described in detail, the invention is not restricted to this, those skilled in the art of the present technique can carry out various modifications according to principle of the present invention.Therefore, all modifications of doing according to the principle of the invention all should be understood to fall into protection scope of the present invention.
Claims (10)
1. an encryption message passes method for synchronizing time mutually, it is characterized in that, comprises the following steps:
When sending message, according to the sign of whether beating timestamp of determining based on message content before encrypting, produce on the corresponding message after encryption corresponding to the first transmitting time stamp t3 that sends the message time;
When the reception message, produce on all messages that receive corresponding to the first time of reception that receives the message time and stab t2, and decipher the corresponding message after the encryption of receiving;
The second transmitting time stamp t1 that the second time of reception that utilizes described the first transmitting time stamp t3, the first time of reception to stab the corresponding message after t2 and the described encryption of master clock node reception stabs t4 and transmission message carries out time synchronized.
2. method according to claim 1, it is characterized in that, described when sending message, according to the sign of whether beating timestamp of determining based on message content before encrypting, the step that produces on the corresponding message after encryption corresponding to the first transmitting time stamp t3 that sends the message time is specially:
When sending message, encrypt message from clock node, and by determining that whether encrypt front message comprises the time-delay request message, produces and beats the timestamp sign or do not beat the timestamp sign;
, produce on the corresponding message after encryption corresponding to the first transmitting time stamp t3 that sends the message time according to the described timestamp sign of beating from clock node;
Wherein said corresponding message refers to comprise the message of request message of delaying time.
3. method according to claim 2, is characterized in that, encrypts message from clock node, and whether comprise the time-delay request message by the message before determining to encrypt, and produces the step of beating the timestamp sign or not beating the timestamp sign and be specially:
If the message before determining to encrypt comprises the time-delay request message, produce on the message before encryption and beat the timestamp sign;
If the message before determining to encrypt does not comprise the time-delay request message, produce on the message before encryption and do not beat the timestamp sign.
4. method according to claim 1, is characterized in that, and is described when receiving message, produce on all messages that receive corresponding to the first time of reception stamp t2 that receives the message time, and the step of the corresponding message after the deciphering encryption of receiving is specially:
When receiving message, produce corresponding to the first time of reception stamp t2 that receives the message time at all messages that receive from clock node;
Corresponding message after the encryption that will receive from clock node is decrypted according to enciphering and deciphering algorithm.
5. method according to claim 4, is characterized in that, the corresponding message after the encryption that will receive from clock node is specially according to the step that enciphering and deciphering algorithm is decrypted:
Corresponding message after the encryption that will receive from clock node is decrypted according to enciphering and deciphering algorithm, and determines to comprise synchronization message in message after deciphering.
6. method according to claim 1, is characterized in that, the second time of reception stamp t4 of the corresponding message after the described encryption of described master clock node reception is carried at the master clock node and sends to from the time-delay response message of clock node.
7. method according to claim 1, is characterized in that, the second transmitting time stamp t1 of described master clock node transmission message is carried at the master clock node and sends to from the synchronization message of clock node or synchronously follow message.
8. a time synchronized implement device that passes mutually based on the encryption IP message, is characterized in that, comprising:
The first transmitting time stamp t3 generation module is used for when sending message, according to the sign of whether beating timestamp of determining based on message content before encrypting, produces on the corresponding message after encryption corresponding to the first transmitting time stamp t3 that sends the message time;
The first time of reception stabs the t2 generation module, is used for when the reception message, produces the first time of reception stamp t2 corresponding to the reception message time on all messages that receive, and deciphers the corresponding message after the encryption of receiving;
The time synchronized module, the second transmitting time stamp t1 that stabs t4 and transmission message for the second time of reception that utilizes described the first transmitting time stamp t3, the first time of reception to stab the corresponding message after t2 and the described encryption of master clock node reception carries out time synchronized.
9. device according to claim 8, it is characterized in that, also comprise protocol process module, be used for encrypting message when sending message, and by determining whether encrypt front message comprises the time-delay request message, produce and beat the timestamp sign or do not beat the timestamp sign, so that the first transmitting time stamp t3 generation module according to the described timestamp sign of beating, produces on the corresponding message after encryption corresponding to the first transmitting time stamp t3 that sends the message time.
10. device according to claim 9, is characterized in that, described protocol process module comprises:
Ciphering unit is used for encrypting the message that sends from clock node;
Decrypting device is used for the corresponding message after encryption that deciphering receives from clock node; And
The sign generation unit is beaten the timestamp sign or is not beaten the timestamp sign for generation of described.
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| CN115484078A (en) * | 2022-08-31 | 2022-12-16 | 中汽创智科技有限公司 | Time synchronization method, device, electronic device and storage medium |
| CN115484078B (en) * | 2022-08-31 | 2024-11-26 | 中汽创智科技有限公司 | Time synchronization method, device, electronic device and storage medium |
| CN115833985A (en) * | 2022-11-16 | 2023-03-21 | 中国联合网络通信集团有限公司 | Time synchronization method, device, communication terminal and storage medium |
| WO2024119485A1 (en) * | 2022-12-09 | 2024-06-13 | 华为技术有限公司 | Communication method and apparatus |
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