JPH05316100A - Ciphered voice packet synchronization system - Google Patents

Ciphered voice packet synchronization system

Info

Publication number
JPH05316100A
JPH05316100A JP4081324A JP8132492A JPH05316100A JP H05316100 A JPH05316100 A JP H05316100A JP 4081324 A JP4081324 A JP 4081324A JP 8132492 A JP8132492 A JP 8132492A JP H05316100 A JPH05316100 A JP H05316100A
Authority
JP
Japan
Prior art keywords
information
time information
voice
packet
ciphered
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP4081324A
Other languages
Japanese (ja)
Inventor
Yoshikiyo Hamaguchi
義清 濱口
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NEC Corp filed Critical NEC Corp
Priority to JP4081324A priority Critical patent/JPH05316100A/en
Publication of JPH05316100A publication Critical patent/JPH05316100A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To obtain the identity between ciphered information at a sender side at decoding of ciphering and ciphering release information at a receiver side by inserting time information represented in prescribed 2-bytes to a fixed location of a voice packet including ciphered voice information. CONSTITUTION:A sender side sends time information for a period of 20msec used at transmission to a receiver side. A voice signal is fetched by a sampling period in 16kbps and converted into digital signal. Then data in the lump are formed by 20bytes, time information for transmission is obtained and voice data are ciphered by using ciphered information corresponding to the transmission time information and time information in 2 bytes is added to a head of the data to generate a voice packet 5 and it is sent. At the receiver side, the time information is stored as time information for checking a defect of the received packet, the voice packet including the ciphered voice is received and the time information in the received packet is checked and compared with fault check time information and when they are not the same nor old information, the ciphered release information relating to the time information is obtained.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は暗号化された音声情報を
持つ音声パケットを使用して通信を実施するときに送受
信双方の暗号化情報,暗号解除情報の同一性をとる暗号
化音声パケット同期方式に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to encrypted voice packet synchronization in which the same encrypted information and decrypted information are transmitted and received when communication is performed using voice packets having encrypted voice information. Regarding the scheme.

【0002】[0002]

【従来の技術】従来、この種の音声通信システムにおい
ては、音声パケットの先頭で同期を取り、それ以降順番
にデータが送られてくるものとし、受信側は音声パケッ
トの先頭で発信側の情報と同期を取り、それ以降は順番
に送られて来るとの仮定に基づいて先頭から順番に暗号
解読を実施していた。
2. Description of the Related Art Conventionally, in this type of voice communication system, it is assumed that synchronization is performed at the beginning of a voice packet, and data is sent in order thereafter, and the receiving side receives information of the sending side at the beginning of the voice packet. It was synchronized with, and after that, based on the assumption that it was sent in order, the decryption was carried out in order from the beginning.

【0003】[0003]

【発明が解決しようとする課題】この従来の音声通信シ
ステムでは、送信側の音声パケットに入れた暗号情報と
受信側でこの暗号を解除するための情報の同一性を取る
のに、受信側で受信した音声パケットの先頭で同一性を
取り、以降順番で受信側で持っている暗号解読情報と同
一性を取っていたので、送信側から送信したパケットが
受信側に到達するまでに途中の伝達システムの原因によ
りパケットの抜け,逆転,同一パケットの重複が発生す
ると、パケットの順番性が狂い、送信側の暗号情報と受
信側の暗号側の暗号解除情報の同一性が取れなくなって
通信ができなくなってしまうという問題が発生してい
た。
In this conventional voice communication system, in order to obtain the same identity between the cipher information included in the voice packet of the transmitting side and the information for deciphering the cipher at the receiving side, Since the received voice packet has the same identity at the beginning and has the same identity as the decryption information held by the receiving side in order, the packet transmitted from the transmitting side is transmitted halfway before reaching the receiving side. If a packet is dropped, reversed, or duplicated for the same packet due to the system's cause, the order of the packets is disturbed, and the sender's encryption information and the receiver's encryption side's decryption information can no longer be identified, enabling communication. There was a problem of disappearing.

【0004】[0004]

【課題を解決するための手段】本発明の暗号化音声パケ
ット同期方式は、暗号化したディジタル音声データを情
報とする音声パケットを送受信する音声通信システムの
暗号化音声パケット同期方式において、送信側は暗号化
したディジタル音声データを入れた前記音声パケットの
中の固定の位置に16ビットの暗号化しない時間情報を
入れて送信し、受信側は暗号を解除する際に前記時間情
報を参照して前記送信側の暗号情報と受信側の暗号解除
情報の同一性を取ることを特徴とする。
According to the encrypted voice packet synchronization system of the present invention, in the encrypted voice packet synchronization system of a voice communication system for transmitting and receiving voice packets having encrypted digital voice data as information, the transmitting side is The 16-bit unencrypted time information is put in a fixed position in the voice packet containing the encrypted digital voice data and transmitted, and the receiving side refers to the time information when deciphering, and The feature is that the encryption information on the transmitting side and the decryption information on the receiving side are identical.

【0005】そして、前記16ビットの暗号化しない時
間情報は前記音声パケットの生起間隔を単位とし、0か
ら65535カウントの範囲でサイクリックに時を刻む
ものであることを特徴とする。
The 16-bit non-encrypted time information is characterized in that the time interval is cyclically set in the range of 0 to 65535 counts with the occurrence interval of the voice packet as a unit.

【0006】[0006]

【実施例】次に、本発明について図面を参照して説明す
る。図1は本発明の暗号化音声パケット同期方式におけ
るパケットフォーマットの一例を示す図、図2は本発明
の一実施例における暗号化音声パケットの送信側の処理
の流れを示すフローチャート、図3は本発明の一実施例
における暗号化音声パケットの受信側の処理の流れを示
すフローチャートである。
DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing an example of a packet format in the encrypted voice packet synchronization system of the present invention, FIG. 2 is a flowchart showing a flow of processing on the transmission side of an encrypted voice packet in an embodiment of the present invention, and FIG. 6 is a flowchart showing the flow of processing on the receiving side of an encrypted voice packet in an embodiment of the invention.

【0007】図1に示すように、本発明の暗号化音声パ
ケット同期方式の一実施例において使用する音声パケッ
ト5はパケットヘッダ1と情報部4とから成り、パケッ
トヘッダ1はJISまたは国際標準のパケット通信で使
用するデータである。情報部4は2バイト(16ビッ
ト)で表現する1カウントが20msecの時間情報2
と、20msecの音声信号をディジタル信号に変換し
暗号化された40バイトの音声データ3とから成る。
As shown in FIG. 1, a voice packet 5 used in an embodiment of the encrypted voice packet synchronization system of the present invention comprises a packet header 1 and an information section 4, and the packet header 1 is a JIS or international standard. This is data used in packet communication. The information section 4 is represented by 2 bytes (16 bits), and one count is 20 msec of time information 2
And audio data 3 of 40 bytes encrypted by converting a 20 msec audio signal into a digital signal.

【0008】続いて本実施例の動作について説明する。
音声情報の通信をする前に送信時に使用する20mse
cで1カウントアップする16ビット(2バイト)の現
在時間を時間情報のみを入れたパケット信号で通知す
る。この時間情報は通信に関係なく20msec毎に刻
み、65535カウントアップし0に戻るものとする。
受信側はこの時間情報を障害チェック用の時間情報とす
る。
Next, the operation of this embodiment will be described.
20mse used at the time of transmission before communication of voice information
The current time of 16 bits (2 bytes) which is incremented by 1 in c is notified by a packet signal containing only time information. It is assumed that this time information is incremented every 20 msec, counts up 65535, and returns to 0 regardless of communication.
The receiving side uses this time information as time information for failure check.

【0009】送信側は送信すべき音声信号を16Kbp
sのディジタル信号に変換し20msec毎40バイト
(1バイトは8バイト)のディジタル化された音声信号
を一塊にし、送信側で持っている時間情報に対応する暗
号化情報で暗号化する。次にこの一塊の情報の先頭に送
信用の時間情報を付け42バイトの情報にしてパケット
化し送信する。受信側は送られてきたパケット情報の時
間情報を障害チェック用時間情報でチェックし、前回送
信されて来たものと同一時間または古い時間の場合は途
中の伝達システムで異常が発生したものとして廃棄し、
そうでないものは送信側から送られて来た時間情報に該
当する暗号解除情報で暗号を解除し、パケット情報の先
頭2バイトについている時間情報を削除した40バイト
の音声情報を送信側で実施したと逆の手順で音声信号に
再生する。また送信側から送られてきた時間情報は次に
受信する音声パケットの障害チェック用時間情報として
記憶する。
The transmitting side transmits a 16 Kbp voice signal to be transmitted.
It is converted into a digital signal of s, and a digitized voice signal of 40 bytes (1 byte is 8 bytes) is made into a lump every 20 msec, and is encrypted with the encrypted information corresponding to the time information held on the transmission side. Next, the time information for transmission is added to the head of this one block of information to form 42-byte information, which is packetized and transmitted. The receiving side checks the time information of the transmitted packet information with the failure check time information, and if it is the same time as the last transmitted time or the old time, discards it as an abnormality in the transmission system on the way. Then
If not, decryption is performed with the descrambling information corresponding to the time information sent from the sending side, and 40 bytes of voice information in which the time information in the first 2 bytes of the packet information is deleted is carried out at the sending side. Play the audio signal in the reverse order of. The time information sent from the transmitting side is stored as failure check time information for the voice packet to be received next.

【0010】次に本実施例における送信側,受信側の処
理手順にてついて図2,図3を参照して詳細に説明す
る。送信側では図2に示すように、送信時に使用する2
0msec周期の時間情報を受信側に送る(ステップS
1)。音声信号を16Kbpsのサンプリング周期で取
り込んでディジタル信号に変換する(S2)。次に20
バイトで一塊のデータとし(S3)、送信用の時間情報
を得て(S4)、送信時間情報に対応する暗号化情報で
音声データを暗号化し(S5)、このデータの先頭に2
バイトの時間情報を付けて図1で示す音声パケット5を
作成して(S6)送信する(S7)。
Next, the processing procedure on the transmitting side and the receiving side in this embodiment will be described in detail with reference to FIGS. On the transmission side, as shown in FIG.
Send time information of 0 msec cycle to the receiving side (step S
1). The audio signal is taken in at a sampling period of 16 Kbps and converted into a digital signal (S2). Then 20
One byte of data is made into bytes (S3), time information for transmission is obtained (S4), voice data is encrypted with encryption information corresponding to the transmission time information (S5), and 2 is added to the beginning of this data.
The voice packet 5 shown in FIG. 1 is created with the byte time information (S6) and transmitted (S7).

【0011】次に受信側では図3に示すように、通信の
前に送信側から送られて来た時間情報を受信したパケッ
トの障害チェックのための時間情報として記憶し(S
8)、これを障害チェック用時間情報と呼ぶ。次に暗号
化された音声の入っている音声パケットを受信する(S
9)。障害チェック用時間情報で受信したパケットにあ
る時間情報をチェックする(S10)。そして障害チェ
ック用時間情報と比較し、同一または古いもの(YE
S)だとパケットの多重受信または逆転が発生したもの
と判定して廃棄する。ここでそうでない場合はパケット
にある時間情報に該当する暗号解除情報を得て暗号を解
除する(S12)。またこの時の時間情報を障害チェッ
ク用時間情報として以前のものを更新し(S13)、暗
号を解除した40バイトの音声データを20msecの
音声信号に復元する(S14)。
Next, on the receiving side, as shown in FIG. 3, the time information sent from the transmitting side before communication is stored as time information for checking the failure of the received packet (S
8), which is called failure check time information. Next, the voice packet containing the encrypted voice is received (S
9). The time information in the received packet is checked as the failure check time information (S10). Then, the same or old one (YE
In the case of S), it is determined that multiple reception or inversion of the packet has occurred, and the packet is discarded. If not, the decryption information corresponding to the time information in the packet is obtained to decrypt the packet (S12). Also, the time information at this time is updated as failure check time information (S13), and the deciphered 40-byte audio data is restored to a 20 msec audio signal (S14).

【0012】[0012]

【発明の効果】以上説明したように本発明は、暗号化さ
れた音声情報を含む音声パケットの固定の位置に音声パ
ケット生起間隔を最小単位とする16ビット(2バイ
ト)で表す時間情報を入れることにより、送信側から送
ったパケットが途中の伝達システムで何らかのトラブル
に会い同一パケットの重複化,パケットの到達の逆転等
が発生しても送信側の使用する暗号化情報をと受信側で
使用する暗号解除情報の同一性が崩れて通信不能になる
のを回避できるという効果を有する。
As described above, according to the present invention, the time information represented by 16 bits (2 bytes) with the minimum unit of the voice packet occurrence interval is put in the fixed position of the voice packet containing the encrypted voice information. As a result, even if the packet sent from the sending side encounters some trouble in the transmission system on the way and the same packet is duplicated or the arrival of the packet is reversed, the encrypted information used by the sending side is used by the receiving side. This has the effect of avoiding a situation in which the identity of the descrambling information is destroyed and communication is disabled.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の暗号化音声パケット同期方式における
パケットフォーマットの一例を示す図である。
FIG. 1 is a diagram showing an example of a packet format in an encrypted voice packet synchronization system of the present invention.

【図2】本発明の一実施例における暗号化音声パケット
の送信側の処理の流れを示すフローチャートである。
FIG. 2 is a flowchart showing the flow of processing on the transmission side of an encrypted voice packet in an embodiment of the present invention.

【図3】本発明の一実施例における暗号化音声パケット
の受信側の処理の流れを示すフローチャートである。
FIG. 3 is a flowchart showing the flow of processing on the receiving side of an encrypted voice packet according to an embodiment of the present invention.

【符号の説明】[Explanation of symbols]

1 パケットヘッダ 2 時間情報 3 暗号化された音声データ 4 情報部 5 音声パケット 1 packet header 2 time information 3 encrypted voice data 4 information section 5 voice packet

───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 FI 技術表示箇所 H04L 12/56 ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 5 Identification code Office reference number FI technical display location H04L 12/56

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 暗号化したディジタル音声データを情報
とする音声パケットを送受信する音声通信システムの暗
号化音声パケット同期方式において、送信側は暗号化し
たディジタル音声データを入れた前記音声パケットの中
の固定の位置に16ビットの暗号化しない時間情報を入
れて送信し、受信側は暗号を解除する際に前記時間情報
を参照して前記送信側の暗号情報と受信側の暗号解除情
報の同一性を取ることを特徴とする暗号化音声パケット
同期方式。
1. In an encrypted voice packet synchronization method of a voice communication system for transmitting and receiving voice packets having encrypted digital voice data as information, the transmitting side includes: in the voice packets containing the encrypted digital voice data. The 16-bit non-encrypted time information is put in a fixed position for transmission, and the receiving side refers to the time information when deciphering the cipher, and the cipher information of the transmitting side and the deciphering information of the receiving side are the same. An encrypted voice packet synchronization method characterized by:
【請求項2】 前記16ビットの暗号化しない時間情報
は前記音声パケットの生起間隔を単位とし、0から65
535カウントの範囲でサイクリックに時を刻むもので
あることを特徴とする請求項1記載の暗号化音声パケッ
ト同期方式。
2. The 16-bit unencrypted time information is based on the occurrence interval of the voice packet as a unit, and ranges from 0 to 65.
2. The encrypted voice packet synchronization system according to claim 1, wherein the time is cyclically ticked in the range of 535 counts.
JP4081324A 1992-04-03 1992-04-03 Ciphered voice packet synchronization system Pending JPH05316100A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4081324A JPH05316100A (en) 1992-04-03 1992-04-03 Ciphered voice packet synchronization system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4081324A JPH05316100A (en) 1992-04-03 1992-04-03 Ciphered voice packet synchronization system

Publications (1)

Publication Number Publication Date
JPH05316100A true JPH05316100A (en) 1993-11-26

Family

ID=13743218

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4081324A Pending JPH05316100A (en) 1992-04-03 1992-04-03 Ciphered voice packet synchronization system

Country Status (1)

Country Link
JP (1) JPH05316100A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0787116A (en) * 1993-08-25 1995-03-31 Internatl Business Mach Corp <Ibm> Method and equipment for controlling network
JP2003521153A (en) * 2000-01-20 2003-07-08 クゥアルコム・インコーポレイテッド Method and apparatus for achieving encryption-synchronization in a packet data communication system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0787116A (en) * 1993-08-25 1995-03-31 Internatl Business Mach Corp <Ibm> Method and equipment for controlling network
JP2003521153A (en) * 2000-01-20 2003-07-08 クゥアルコム・インコーポレイテッド Method and apparatus for achieving encryption-synchronization in a packet data communication system
JP4694079B2 (en) * 2000-01-20 2011-06-01 クゥアルコム・インコーポレイテッド Method and apparatus for achieving encryption-synchronization in a packet data communication system

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