EP0915435B1 - Procédé pour stocker en sécurité des données variables - Google Patents

Procédé pour stocker en sécurité des données variables Download PDF

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Publication number
EP0915435B1
EP0915435B1 EP99100885A EP99100885A EP0915435B1 EP 0915435 B1 EP0915435 B1 EP 0915435B1 EP 99100885 A EP99100885 A EP 99100885A EP 99100885 A EP99100885 A EP 99100885A EP 0915435 B1 EP0915435 B1 EP 0915435B1
Authority
EP
European Patent Office
Prior art keywords
data
current
franking machine
pointer
record
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.)
Expired - Lifetime
Application number
EP99100885A
Other languages
German (de)
English (en)
Other versions
EP0915435A3 (fr
EP0915435A2 (fr
Inventor
Andreas Wagner
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.)
Francotyp Postalia GmbH
Original Assignee
Francotyp Postalia GmbH
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 Francotyp Postalia GmbH filed Critical Francotyp Postalia GmbH
Publication of EP0915435A2 publication Critical patent/EP0915435A2/fr
Publication of EP0915435A3 publication Critical patent/EP0915435A3/fr
Application granted granted Critical
Publication of EP0915435B1 publication Critical patent/EP0915435B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07B—TICKET-ISSUING APPARATUS; FARE-REGISTERING APPARATUS; FRANKING APPARATUS
    • G07B17/00—Franking apparatus
    • G07B17/00016—Relations between apparatus, e.g. franking machine at customer or apparatus at post office, in a franking system
    • G07B17/0008—Communication details outside or between apparatus
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07B—TICKET-ISSUING APPARATUS; FARE-REGISTERING APPARATUS; FRANKING APPARATUS
    • G07B17/00—Franking apparatus
    • G07B17/00733—Cryptography or similar special procedures in a franking system
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07B—TICKET-ISSUING APPARATUS; FARE-REGISTERING APPARATUS; FRANKING APPARATUS
    • G07B17/00—Franking apparatus
    • G07B17/00016—Relations between apparatus, e.g. franking machine at customer or apparatus at post office, in a franking system
    • G07B17/0008—Communication details outside or between apparatus
    • G07B2017/00088—Communication details outside or between apparatus via landlines
    • G07B2017/00096—Communication details outside or between apparatus via landlines via phone lines
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07B—TICKET-ISSUING APPARATUS; FARE-REGISTERING APPARATUS; FRANKING APPARATUS
    • G07B17/00—Franking apparatus
    • G07B17/00016—Relations between apparatus, e.g. franking machine at customer or apparatus at post office, in a franking system
    • G07B17/0008—Communication details outside or between apparatus
    • G07B2017/00153—Communication details outside or between apparatus for sending information
    • G07B2017/00161—Communication details outside or between apparatus for sending information from a central, non-user location, e.g. for updating rates or software, or for refilling funds
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07B—TICKET-ISSUING APPARATUS; FARE-REGISTERING APPARATUS; FRANKING APPARATUS
    • G07B17/00—Franking apparatus
    • G07B17/00016—Relations between apparatus, e.g. franking machine at customer or apparatus at post office, in a franking system
    • G07B17/0008—Communication details outside or between apparatus
    • G07B2017/00153—Communication details outside or between apparatus for sending information
    • G07B2017/00169—Communication details outside or between apparatus for sending information from a franking apparatus, e.g. for verifying accounting
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07B—TICKET-ISSUING APPARATUS; FARE-REGISTERING APPARATUS; FRANKING APPARATUS
    • G07B17/00—Franking apparatus
    • G07B17/00733—Cryptography or similar special procedures in a franking system
    • G07B2017/00822—Cryptography or similar special procedures in a franking system including unique details
    • G07B2017/0083—Postal data, e.g. postage, address, sender, machine ID, vendor
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07B—TICKET-ISSUING APPARATUS; FARE-REGISTERING APPARATUS; FRANKING APPARATUS
    • G07B17/00—Franking apparatus
    • G07B17/00733—Cryptography or similar special procedures in a franking system
    • G07B2017/00846—Key management
    • G07B2017/0087—Key distribution
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07B—TICKET-ISSUING APPARATUS; FARE-REGISTERING APPARATUS; FRANKING APPARATUS
    • G07B17/00—Franking apparatus
    • G07B17/00733—Cryptography or similar special procedures in a franking system
    • G07B2017/00935—Passwords

Definitions

  • the invention relates to a method for the secure storage of changeable data, in particular the data that accumulates during a Can change remote value specification.
  • a power failure can result in a record in memory saved incorrectly. It is for operating a data processing system therefore already known, a second memory for an identical data set and to provide a state memory for a state identifier, the latter indicates whether the data record is read from the first or the second memory should be when the voltage returns.
  • Errors in the status code can be saved by redundantly saving the Status identifier can be disabled.
  • the most common condition identifier in the case of a majority check, however, the correct status identifier is not always required his. It is only most likely that the most common condition identifier is also the right one.
  • An additional plausibility check only checks the Belonging to a valid range of values, but does not provide a clear one Statement whether the status identifier is correct or not. With the above described method, therefore, an error is not recognized, the most common is saved and is within the valid range of values.
  • an electronic franking machine is known, the Microcomputer connected to two redundant non-volatile memories which each have a set of accounting data stored in a given relationship to each other.
  • the set of accounting data is also at another location of the non-volatile memory unit saved.
  • Means are provided to at least a portion of the on the third place stored data as a result of a signal from the input means of Change postage meter, where the changed values have the same relationship maintain each other.
  • the franking machine has means to changed values in the first and second non-volatile memories copy when the postage printing device of the franking machine is activated.
  • the temporarily at the third position of the non-volatile memory unit saved current accounting data are thus in the first and the second non-volatile memory permanently stored.
  • To check the data the consistency of the two non-volatile memories is saved Compare data with each other. In addition, this data must be specific fulfill arithmetic conditions. If the Data to be compared with each other can be checked on the basis of these conditions which of the data records may be contains an error.
  • the first data record is determined as the current, unchangeable data record
  • the Data is available for a query that changes data this change in the non-current second data record occurs that then the second data record for the current data record using the pointer is determined and that the data from the current second data set in the not current first record to be copied.
  • 10 denotes a user station, which is a franking machine 12 and a telephone 14 includes.
  • This phone or communication terminal such as. a modem, is connected to a via a telephone line 15 Telephone or communication terminal 16 in a data center 18, which further contains a billing device 20.
  • the franking machine 12 includes one generally designated 22 Data processing device with a CPU 24, a credit memory 26, a default value memory 28 and a cryptographic device 30 which includes a key store 12.
  • the data processing device 22 of course includes other parts, memories and registers here but are not shown, since they are used to describe the invention Procedures are not needed.
  • software means or program storage means of the CPU 24 used in connection with the non-volatile key memory 32 to perform the encryption.
  • the data processing device 22 is data exchange (modem method) connected to the communication terminal modem 14 via a line 23, which then replaces the phone 14. With the data processing device 22 an input device 34, for example a keyboard, is also connected, a display device 36 and a printing device 38.
  • the accounting device 20 in the data center 18 comprises one Input device 40 and a data processing device 42 with a CPU 44, a default value memory 45, an accounting memory 46 and a cryptographic device 48 with a key store 50.
  • encryption can take place in device 48 in conjunction with the CPU 44 and the non-volatile key memory by software.
  • the data processing device 42 is a modem method via a line 51 connected to the modem, which in this case replaces the telephone 16.
  • the value change and remote value specification method shown in FIG. 2 begins by entering input device 34 of franking machine 12 enters an identity number (PAN) (S1) which is activated by a special key 52 (FIG. 1) is confirmed.
  • PAN identity number
  • FOG. 1 a special key 52
  • the one stored in the default value memory 28 appears in the display Default.
  • the program of the data processing device branches that of the transaction "Value change" corresponding routine (S2). Then the Desired default value by means of the input device 34 in the data processing device entered and by pressing the special key 52 approved.
  • the operator enters the identity number in the Input device 40 of the billing device 20 to the caller and to identify the franking machine 12 of the user station 10.
  • Checking the Identity number is shown at S6. If the check is negative, it will Procedure canceled and repeated if necessary. Can the franking machine however, the process continues. Thereby the Operator of the user's default request and any other Information about the franking machine, in particular values in the Billing registers communicated.
  • the Identity number calculates first code number (S7), which in the display device 36 Franking machine 12 displayed and by the user the operator in the data center 18 is transmitted.
  • this code number in the Data center 18 checks using that stored in the data center Key K1. If the result of the test is negative, the test is compared to that of the key used in previous transaction repeated. If it succeeds Verification now, it means that the previous transaction in the Franking machine was not or not completely and correctly executed. The previous transaction is therefore canceled and the procedure continues. If the code number cannot be verified with the previous key, the process is terminated.
  • the first code number can be Successfully verify, the default value in memory 45 of the data center stored and the data processing device 42 in the data center 18 calculates a second code number from the identity number, the additional information and the key K1.
  • a second key K2 (S9) is also calculated.
  • This second code number in which the new key K2 is integrated, is the User communicated to them in the input device 34 of the franking machine enters.
  • the cryptographic device 30 is verified in the franking machine the second code number, extracted from the transmitted second code number Key K2 and stores it in place of the key K1. With negative
  • the procedure is terminated, if the result is positive the entered default request stored in the default value memory 28, the previous default value is deleted (S11).
  • the system calculates Data center from the identity number, the additional information and the Key K2 is a fourth code number (S15) that the franking machine together is transmitted with a new key K3.
  • the franking machine is like in the first transaction, the fourth code number is verified (S16) and the new one Key K3 is extracted from the fourth code number and stored, as is the case with the first transaction with the key K2. Be in the data center the old and the new key are saved. If the result is negative the procedure was terminated.
  • the Default value memory 28 of the franking machine stored value at Remaining credit in the credit memory 26 of the franking machine and in Preset value memory 45 to the billing device 20 stored value the remaining credit in the billing memory 46 of the data center 18 added (S17).
  • step S2 If you do not want to change the default value, use Actuation of the special key 52 or an optionally provided third Special key confirms the default value stored in the default value memory 28 and the method goes from step S2 directly to step 4 'in Fig. 2b.
  • the User calls the data center and gives the operator the identity number (PAN) and possibly further information with (S5 '). Is the If the identity number is correct (S6 '), the remote value specification procedure then runs accordingly the above description from step S13 to step S17.
  • the operator has further data about the franking machine, in particular can query further register statuses to ensure the correctness of all Billing data in the franking machine and the data center check. It is also possible to get more information and more subkeys to be included in the calculation of the code number if this is to increase the Security seems reasonable. If in the data center in step S14 one of the Postage meter transmitted code number is checked, and the result is negative is always with the in the franking machine at the direct previous transaction, keys used the check again repeated. This will capture a case where a transaction in the Franking machine was not completed correctly without this Data center has received knowledge of this. In this case it would be from the data center did not transmit new keys in the franking machine saved and the franking machine is therefore encrypted with the old one Key. This gives the opportunity to cancel or cancel the last transaction correct and damage the user or the data center avoid.
  • FIGS. 3a and 3b shows the value change and Reload procedure in the event that communication between the Franking machine and the data center is done automatically via modem. There the steps of the procedure are essentially the same as for the The individual steps are also using the method according to FIGS. 2a and 2b the same reference numbers increased by the number 20.
  • FIG. 4 shows the division of the storage space in a schematic manner non-volatile memory, for example an NVRAM that is in the Postage meter and possibly also in the data center.
  • the memory must have space to store two data records, namely sentence 1 and sentence 2 as well to save a pointer.
  • Each record contains a variable Sentence "var”, which can consist of any number of bytes.
  • Each also includes Record a counter variable "nr updates” which is the number of changes of the data set, i.e. every time the data is changed or renewed of a sentence is increased by 1.
  • Checksum which includes at least a portion of variable data of the data set is determined.
  • the Act Pointer pointer can only have two allowable values that indicate which of the two records is currently considered the current record.
  • the values 0 and 1 are not saved because none of these values Bit error can be detected. Rather, the values become 0 x A5 and 0 x 5A used, where 0 x indicates that the values are in hexadecimal notation. at This number, constructed symmetrically in binary representation, can cause bit errors the number itself can be recognized.
  • the initialization of the memory comprises the following steps:
  • the pointer is set to set 1 (step S50). That means that the Sentence 1 is considered to be current storage, the data of which cannot be changed.
  • step S51 the variables of data record 2 are reset to their initial values set.
  • the count nr updates in data record 2 receives the value 0 (S52).
  • the checksum is calculated using at least a part of the variable values of data record 2 are generated and at the provided for this Location of data record 2 saved (S53, S54).
  • the pointer to the second record set i.e. the second record becomes the current one Data set determined (S55), on the data of which is now reliable and immutable data can be accessed.
  • step S56 copies the entire contents of data record 2 into data record 1 so that both records contain identical data.
  • step S61 changing data is written into the non-current data record. Because in Step S61 have changed the data of the data set, the count value no updates increased by 1 in step S62. Then the checksum is made up of data of the non-current memory newly formed (S63) and in the non-current data record saved (S64). Now the pointer is directed to the data record in which the data has just been changed so that this record is now the current one Record is (S65). Finally, the entire data of the now copied current data record into the other, not current data record (S66). Both data records in turn contain the identical data.
  • Step S70 it is checked in step S70 whether the value of the pointer is permissible.
  • Step S71 checks whether the checksum of the current through the pointer designated record is valid. If one of the two steps is not fulfilled, then switches the franking machine to service mode, as already mentioned above.
  • step S70 and S71 are positive Result is carried out, the validity of the checksum is not in step S72 current memory checked. If this test is negative, i.e. is the checksum not valid, it can be assumed that the data storage or the Mirroring was interrupted. To correct this error, the Mirroring repeated, i.e. all data of the current data record are stored in the Copied non current record (S73). However, the checksum has turned out to be proven valid, it is checked in S74 whether the checksums of the two data records and therefore your data is the same. If this is the case, the test is finished. If, on the other hand, both checksums are valid but not the same, then that is Backup process has been interrupted before mirroring. In this The data record whose count "nr updates" is greater than that will be the case Count value of the other, selected as the current record. His data is in the copied another record (S75).
  • the franking machine can be used both for the voice procedure as well as for the modem procedure.
  • a selection button 58 Fig. 1 on the franking machine, the user can type the communication method with the data center.

Claims (4)

  1. Procédé pour stocker en sécurité des données variables par production et mémorisation de deux jeux de données (Set1, Set 2) semblables, comportant les étapes de procédé suivantes
    a) à l'aide d'un pointeur (Act Pointer) on définit un premier jeu de données (Set1) comme jeu de données actuel, non variable, dont les données sont disponible pour une lecture,
    b) lors d'une modification de données, la modification est effectuée dans le deuxième jeu de données (Set2), non actuel,
    c) ensuite, à l'aide du pointeur (Act Pointer), on définit le deuxième jeu de données (Set2) comme jeu de données actuel et
    d) on copie les données du deuxième jeu de données (Set2) actuel dans le premier jeu de données (Set1) non actuel.
  2. Procédé selon la revendication 1, caractérisé en ce qu'une variable (nr Updates) des données variables de chaque jeu de données (Set1, Set2) est une valeur de comptage représentative du nombre des modifications opérées.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce qu'une variable (Checksum) des données variables de chaque jeu de données (Set1, Set2) est une somme de contrôle calculée à partir d'au moins une partie des données variables.
  4. Procédé selon une des revendications 1 à 3, caractérisé en ce qu'on contrôle la consistance de la valeur du pointeur (Act Pointer) ainsi que la consistance et l'identité de données sélectionnées des jeux de données (Set1, Set2) et le cas échéant on corrige celles-ci.
EP99100885A 1994-06-24 1995-06-23 Procédé pour stocker en sécurité des données variables Expired - Lifetime EP0915435B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4422263A DE4422263A1 (de) 1994-06-24 1994-06-24 Verfahren zum Abstimmen des Datenbestandes zwischen einer elektronischen Frankiermaschine und einem Datenzentrum
DE4422263 1994-06-24
EP95109864A EP0689170B1 (fr) 1994-06-24 1995-06-23 Procédé d'adaption du fichier de données entre une machine à affranchir et un centre de données

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP95109864A Division EP0689170B1 (fr) 1994-06-24 1995-06-23 Procédé d'adaption du fichier de données entre une machine à affranchir et un centre de données

Publications (3)

Publication Number Publication Date
EP0915435A2 EP0915435A2 (fr) 1999-05-12
EP0915435A3 EP0915435A3 (fr) 2000-06-07
EP0915435B1 true EP0915435B1 (fr) 2002-10-02

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ID=6521496

Family Applications (2)

Application Number Title Priority Date Filing Date
EP99100885A Expired - Lifetime EP0915435B1 (fr) 1994-06-24 1995-06-23 Procédé pour stocker en sécurité des données variables
EP95109864A Expired - Lifetime EP0689170B1 (fr) 1994-06-24 1995-06-23 Procédé d'adaption du fichier de données entre une machine à affranchir et un centre de données

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP95109864A Expired - Lifetime EP0689170B1 (fr) 1994-06-24 1995-06-23 Procédé d'adaption du fichier de données entre une machine à affranchir et un centre de données

Country Status (5)

Country Link
US (1) US5699415A (fr)
EP (2) EP0915435B1 (fr)
AT (2) ATE225544T1 (fr)
DE (3) DE4422263A1 (fr)
ES (2) ES2187080T3 (fr)

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Also Published As

Publication number Publication date
ATE225544T1 (de) 2002-10-15
US5699415A (en) 1997-12-16
DE59510406D1 (de) 2002-11-07
EP0915435A3 (fr) 2000-06-07
ES2258764T3 (es) 2006-09-01
EP0689170A3 (fr) 1996-12-27
EP0915435A2 (fr) 1999-05-12
ES2187080T3 (es) 2003-05-16
ATE313126T1 (de) 2005-12-15
EP0689170A2 (fr) 1995-12-27
DE4422263A1 (de) 1996-01-04
DE59511028D1 (de) 2006-01-19
EP0689170B1 (fr) 2005-12-14

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