JPH021640A - Time slot replacing device - Google Patents

Time slot replacing device

Info

Publication number
JPH021640A
JPH021640A JP63141796A JP14179688A JPH021640A JP H021640 A JPH021640 A JP H021640A JP 63141796 A JP63141796 A JP 63141796A JP 14179688 A JP14179688 A JP 14179688A JP H021640 A JPH021640 A JP H021640A
Authority
JP
Japan
Prior art keywords
data
circuit
time slot
counter
parallel
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
JP63141796A
Other languages
Japanese (ja)
Inventor
Eiichi Kabaya
蒲谷 衛一
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 JP63141796A priority Critical patent/JPH021640A/en
Publication of JPH021640A publication Critical patent/JPH021640A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To cipher or decode input data in a multiplexing level by means of a simple hardware by using information of read and write counters for data which has been converted in parallel in a temporary memory circuit for time slot replacement. CONSTITUTION:Respective inputted data signals 1-N are converted into parallel data in a serial/parallel conversion circuit 1. A decoding circuit 2 decodes data in accordance with the instruction of a control circuit 8 by using information of a write counter 6, and data is written into the temporary memory circuit 3. Data which has been read from the storage circuit 4 by a read counter 7 is ciphered by an encipherment circuit 3 in accordance with the instruction of the circuit 8 by using information of the counter 7, and parallel data is converted into serial data by the serial/parallel conversion circuit 5 so as to be outputted. Thus, data can be ciphered in the units of multiplexed line by the simple hardware.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、タイムスロット順序の時間的入替えを行なう
タイムスロット入替え装置に関し。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a time slot switching device for temporally switching the order of time slots.

特に多重化された信号を効果的に暗号化するタイムスロ
ット入替え装置に関するものである。
In particular, the present invention relates to a time slot switching device that effectively encrypts multiplexed signals.

〔従来の技術〕[Conventional technology]

従来、この種のタイムスロット入替え装置では、暗号化
を行なう場合には、別ハードとして暗号化を行う部分及
び復号化を行なう部分が必要であった。また暗号化は多
重化された信号全体に対して行なっていた。
Conventionally, in this type of time slot switching device, when performing encryption, separate hardware was required for an encryption part and a decryption part. Furthermore, encryption was performed on the entire multiplexed signal.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

しかしながら、上述した従来のタイムスロット入替え装
置における暗号化は、暗号化を行なう部分及び復号化を
行なう部分が別ノ・−ドとして必要となるため、ハード
規模が増大するという欠点があった。また多重化された
信号全体に対し暗号化を行なうため、多重化されている
各回線単位に暗号化を行なうことは難しいという欠点が
あった。
However, the above-described encryption in the conventional time slot switching device has the disadvantage that the hardware size increases because the encryption part and the decryption part are required as separate nodes. Furthermore, since the entire multiplexed signal is encrypted, it is difficult to encrypt each multiplexed line.

そこで本発明の技術的課題は、上記欠点に鑑み、簡単な
ハードウェアで回線単位で暗号化を行なうことができる
タイムスロット入替え装置を提供することである。
SUMMARY OF THE INVENTION In view of the above drawbacks, it is a technical object of the present invention to provide a time slot switching device that can perform encryption on a line-by-line basis using simple hardware.

〔課題を解決するための手段〕[Means to solve the problem]

本発明によれば、入力信号(1、2・・・N)を復号化
する復号化回路(2)と、該復号化された信号を、書込
みカウンタ(6)の出力情報に従ってデータとしてシー
ケンシャルに格納する記憶回路(3)と、該記憶回路(
3)から読出しカウンタ(力の出力情報に従ってランダ
ムに読出された前記データを暗号化する暗号化回路(4
)とを有し、入力信号(1、2・・・N)のタイムスロ
ットの入替えを行なうタイムスロット入替え装置であっ
て、前記復号化回路(2)に、前記書込みカウンタ(6
)の出力情報に基づいて、前記入力信号(1、2・・・
N)の復号化を行なわせ、前記暗号化回路(4)に、前
記読出しカウンタ(7)の出力情報に基づいて前記デー
タの暗号化を行なわせる制御回路を設けたことを特徴と
するタイムスロット入替え装置が得られる。
According to the present invention, a decoding circuit (2) decodes an input signal (1, 2...N), and the decoded signal is sequentially converted into data according to the output information of a write counter (6). A memory circuit (3) for storing and a memory circuit (3) for storing
3) an encryption circuit (4) that encrypts the data read out at random according to the output information of the read counter (4).
), the time slot switching device switches the time slots of input signals (1, 2...N), wherein the decoding circuit (2) includes the write counter (6).
) based on the output information of the input signals (1, 2...
N) and a control circuit that causes the encryption circuit (4) to encrypt the data based on the output information of the read counter (7). A replacement device is obtained.

〔実施例〕〔Example〕

次に2本発明の実施例について1図面を参照して説明す
る。
Next, two embodiments of the present invention will be described with reference to one drawing.

第1図は第1の実施例である。入力された各データ信号
1.2・・・Nば、直並列変換回路1で並列データに変
換する。この並列データに対して制御回路8の指示によ
シ書込みカウンタ6の情報を用いて、復号化回路2で復
号化を行い、同様に一時記憶回路3に書き込む。次に、
読出しカランタフにより、−時記憶回路3から読出され
たデータは制御回路8の指示によシ、その読出しカウン
タ7の情報を用いて、暗号化回路4で暗号化を行う。こ
の後、並直列変換回路5で。
FIG. 1 shows a first embodiment. Each input data signal 1, 2, . . . , N is converted into parallel data by a serial/parallel conversion circuit 1. This parallel data is decoded by the decoding circuit 2 using information from the write counter 6 according to instructions from the control circuit 8, and similarly written to the temporary storage circuit 3. next,
The data read out from the - hour storage circuit 3 by the readout counter is encrypted by the encryption circuit 4 using the information of the readout counter 7 according to instructions from the control circuit 8. After this, in the parallel-to-serial conversion circuit 5.

並列データは直列データに変換され出力される。Parallel data is converted to serial data and output.

第2図に本実施例の実際の使用例を示す。第■のタイム
スロット入替装置#lにおけるデータ信号は、読出しカ
ウンタ7で、−時記憶回路3から読出されると同時に、
前記読出しカウンタ7の情報を用いて暗号化される。そ
の後、並直列変換回路5で並直列変換された後、対向の
第2のタイムスロット入替装置#2に入力される。第2
のタイムスロット入替装置#2では。
FIG. 2 shows an example of actual use of this embodiment. The data signal in the time slot switching device #l is read out from the - hour storage circuit 3 by the read counter 7, and at the same time,
It is encrypted using the information of the read counter 7. Thereafter, the signal is subjected to parallel-to-serial conversion by the parallel-to-serial conversion circuit 5, and then input to the opposing second time slot switching device #2. Second
In the time slot switching device #2.

直並列変換回路lで直並列変換した後、書込みカウンタ
6の情報を用いて復号化回路2で復号化する。ここで、
第1及び第2のタイムスロット入替装置#l及び#2の
間で、タイムスロットの入替えがなければ、第1のタイ
ムスロット入替装置#1の出力側と第2のタイムスロッ
ト入替装置#2の入力側とでは多重化レベルにおけるデ
ータは、同一フォーマット(データ入力l〜Nに関係し
ない部分では)となる。すなわち。
After serial-to-parallel conversion is performed by the serial-to-parallel conversion circuit 1, the data is decoded by the decoding circuit 2 using information from the write counter 6. here,
If there is no time slot switching between the first and second time slot switching devices #l and #2, the output side of the first time slot switching device #1 and the output side of the second time slot switching device #2 On the input side, the data at the multiplexing level has the same format (in portions not related to data inputs l to N). Namely.

第1のタイムスロット入替装置−t#lの読出しカウン
タ7と第2のタイムスロット入替装置#2の書込みカウ
ンタ6をデータ信号に対して、同じ位相で回すことが可
能となる。これにより。
It becomes possible to rotate the read counter 7 of the first time slot switching device-t#l and the write counter 6 of the second time slot switching device #2 in the same phase with respect to the data signal. Due to this.

暗号化と復号化とに使用する情報を同一とすることがで
きる。
The same information can be used for encryption and decryption.

〔発明の効果〕〔Effect of the invention〕

以上説明したように2本発明は、タイムスロ7)入替え
用の一時記憶回路で、並列に変換されたデータに対し、
読出しカウンタ及び書込みカウンタの情報を利用して、
入力データを暗号化又は復号化を行うことによシ、多重
化レベルでの暗号化を行い、ハード規模を低減できる効
果がある。
As explained above, in the present invention, the time slot 7) temporary storage circuit for replacement is used to store data converted in parallel.
Using the information of the read counter and write counter,
By encrypting or decrypting input data, encryption is performed at the multiplex level, which has the effect of reducing the hardware scale.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明の実施例に係る回路構成、第2図は第1
図に示した装置の実際の使用例である。 1・・・直並列変換回路、2・・・復号化回路、3・・
・−時記憶回路、4・・・暗号化回路、5・・・並直列
変換回路、6・・・書込みカウンタ、7・・・読出しカ
ウンタ、8・・・制御回路。
FIG. 1 shows a circuit configuration according to an embodiment of the present invention, and FIG.
This is an example of actual use of the device shown in the figure. 1...Serial-to-parallel conversion circuit, 2...Decoding circuit, 3...
- Time storage circuit, 4... Encryption circuit, 5... Parallel-to-serial conversion circuit, 6... Write counter, 7... Read counter, 8... Control circuit.

Claims (1)

【特許請求の範囲】 1)入力信号(1、2・・・N)を復号化する復号化回
路(2)と、該復号化された信号を、書込みカウンタ(
6)の出力情報に従ってデータとしてシーケンシャルに
格納する記憶回路(3)と、該記憶回路(3)から読出
しカウンタ(7)の出力情報に従ってランダムに読出さ
れた前記データを暗号化する暗号化回路(4)とを有し
、入力信号(1、2・・・N)のタイムスロットの入替
えを行うタイムスロット入替え装置であって、 前記復号化回路(2)に、前記書込みカウンタ(6)の
出力情報に基づいて前記入力信号(1、2・・・N)の
復号化を行なわせ、 前記暗号化回路(4)に、前記読出しカウンタ(7)の
出力情報に基づいて前記データの暗号化を行なわせる制
御回路を設けたことを特徴とするタイムスロット入替え
装置。
[Claims] 1) A decoding circuit (2) that decodes an input signal (1, 2...N), and a write counter (2) that decodes the decoded signal.
a memory circuit (3) for sequentially storing data as data according to the output information of the memory circuit (3); and an encryption circuit (3) for encrypting the data read out randomly from the memory circuit (3) according to the output information of the read counter (7) 4), the time slot switching device for switching time slots of input signals (1, 2...N), wherein the output of the write counter (6) is input to the decoding circuit (2). The input signal (1, 2...N) is decrypted based on the information, and the encryption circuit (4) is caused to encrypt the data based on the output information of the read counter (7). A time slot switching device characterized in that it is provided with a control circuit for causing the time slot switching to be performed.
JP63141796A 1988-06-10 1988-06-10 Time slot replacing device Pending JPH021640A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63141796A JPH021640A (en) 1988-06-10 1988-06-10 Time slot replacing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63141796A JPH021640A (en) 1988-06-10 1988-06-10 Time slot replacing device

Publications (1)

Publication Number Publication Date
JPH021640A true JPH021640A (en) 1990-01-05

Family

ID=15300339

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63141796A Pending JPH021640A (en) 1988-06-10 1988-06-10 Time slot replacing device

Country Status (1)

Country Link
JP (1) JPH021640A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03264300A (en) * 1980-11-14 1991-11-25 Gerber Garment Technol Inc Ultrasonic cutting device for sheet material

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03264300A (en) * 1980-11-14 1991-11-25 Gerber Garment Technol Inc Ultrasonic cutting device for sheet material

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