USRE41657E1 - Data management system - Google Patents
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- USRE41657E1 USRE41657E1 US10/170,677 US17067702A USRE41657E US RE41657 E1 USRE41657 E1 US RE41657E1 US 17067702 A US17067702 A US 17067702A US RE41657 E USRE41657 E US RE41657E
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- 238000000034 method Methods 0.000 claims description 48
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- H04L9/0816—Key establishment, i.e. cryptographic processes or cryptographic protocols whereby a shared secret becomes available to two or more parties, for subsequent use
- H04L9/0819—Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s)
- H04L9/083—Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s) involving central third party, e.g. key distribution center [KDC] or trusted third party [TTP]
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- H04N2005/91364—Television signal processing therefor for scrambling ; for copy protection by modifying the video signal the video signal being scrambled
Abstract
Description
Cmks=E(M,Ks).
M=D(Cmks,Ks).
Cmkb=E(M,Kb).
The operation to decrypt the cryptogram Cmkb to the plain text data content M using a private-key Kv is expressed as:
M=D(Cmkv,Kv).
The operation to encrypt the plain text data content M to a cryptogram Cmkv using a private-key Kv is expressed as:
Cmkv=E(M,Kv),
and the operation to decrypt the cryptogram Cmkv to the plain text data content M using the public-key Kb is expressed as:
M=D(Cmkb,Kb).
Cmks1=E(M,Ks1)
and further encrypts the first secret-key Ks1 by the first public-key Kb1:
Cks1kb1=E(Ks1,Kb1)
and the second secret-key Ks2 by the second public-key Kb2:
Cks1kb2=E(Ks2,Kb2).
The database then transmits these encrypted data content Cmks1 and the first and the second secret-keys Cks1kb1 and Ck2kb2 to the first user.
Ks1=D(Kv1,Cks1kb1),
and decrypts the encrypted data content Cmks1 by the decrypted first secret-key Ks1:
M=D(Ks1,Cmks1)
and use it. The user decrypts encrypted second secret-key Cks2kb2 by the second private-key Kv2:
Ks2=D(Kv2,Cks2kb2),
which is subsequently used as a key for encrypting/decrypting of storing, copying, or transmitting data content.
Cm1ks21=E(M1,Ks21)
Cm2ks22=E(M2,Ks22)
Cm3ks23=E(M3,Ks23).
The data content parts M4, M5 and M6, of original data content are also encrypted using each of the second secret-keys Ks21, Ks22, Ks23 supplied with each of the original data content when used for operations other than display:
Cm4ks21=E(M4,Ks21)
Cm5ks22=E(M5,Ks22)
Cm6ks23=E(M6,Ks23).
Spe=D(Pe,Kv1)
and supplies encrypted original data content parts Cm4ks21, Cm5ks22 and Cm6ks23 to second user together with the edit program Pe with the digital signature, via
Pe=E(Spe,Kb1),
and determines if first user is a valid user to use the original data content to which the second secret-keys Ks21, Ks22, Ks23 correspond. If first user is the valid user, the center transmits the second secret-keys Ks21, Ks22, Ks23 to second user. Otherwise, it does not transmit the second secret-keys Ks21, Ks22, Ks23 to second user.
Cm0ks1=E(M0,Ks1),
and is provided to
M0=D(Cm0ks1,Ks1),
and use it.
Cm0ks1=E(M0,Ks1)
and re-encrypted original data content Cm0ks1 is stored.
Cm0′ks2=E(M0′,Ks2).
Cm1ks3=E(Ks3,M1),
and provide it for
M1=D(Ks3,Cm1ks3)
and use it.
- (1) The original author A presents the original copyright label Lc0 and requests the data management center to distribute original secret-key Ks0. The original author may transfer or deposit the original data content to an information provider or to database so that the information provider or the database can play a role of the original author.
- (2) When requested to distribute the original secret-key Ks0, the data management center encrypts the original secret-key Ks0 corresponding to the original copyright label Lc0 using public-key Kb0 of the original author A:
Cks0kb0=E(Ks0,Kb0)
and sends the encrypted original secret-key Cks0kba together with the original copyright label Lc0 to the original author A.
- (3) When the encrypted original secret-key Cks0kb0 is distributed, the original author A decrypts the encrypted original secret-key Cks0kb0 using private-key Kv0 of the original author A:
Ks0=D(Cks0kb0,Kv0),
encrypts the original data content M0 using the decrypted original secret-key Ks0:
Cm0ks0=E(M0,Ks0)
and transfers the encrypted original data content Cm0ks0, the original copyright label Lc0 and the original copyright label fingerprint F0 to the first user U1. - (4) When the encrypted original data content Cm0ks0, the original copyright label Lc0 and the original copyright label fingerprint F0 are transferred, the first user U1 presents the original copyright label Lc0, the original copyright label fingerprint F0 and first user label Lu1 and requests the data management center to distribute the original secret-key Ks0.
- (5) When requested to distribute the original secret-key ks0, the data management center confirms validity of the presented original copyright label Lc0 using the original copyright label fingerprint F0 and registers the first user label Lu1. At the same time, the original secret-key Ks0 corresponding to the original copyright label Lc0 is encrypted using public-key Kb1 of the first user U1:
Cks0kb1=E(Ks0,Kb1)
and the encrypted original secret-key Cks0kb1 is distributed to the first user U1. - (6) When the encrypted original secret-key Cks0kb1 is distributed, the first user U1 decrypts the encrypted original secret-key Cks0kb1 using private-key Kv1 of the first user U1:
Ks0=D(Cks0kb1,Kv1),
decrypts the encrypted original data content Cm0ks0 using the decrypted original secret-key Ks0:
M0=D(Cm0ks0,Ks0),
and edits the decrypted original data content M0 using the edit tool and obtains edited data content Me1.
- (7) To protect the secondary copyright of the first user relating to the edited data content Me1, label of the first user, who is the author of the edited data content, and its electronic fingerprinting are used in this embodiment.
- (8) When the first edit label Le1 is presented, the data management center confirms validity of the presented original copyright label Lc0 using the original copyright label fingerprint F0 and registers the first edit label Le1. At the same time, the electronic fingerprint F1 of the first edit label Le1 is prepared, and first edit secret-key Kse1 corresponding to the first edit label Le1 is encrypted by public-key Kb1 of the first user U1 at the data management center:
Ckse1kb1=E(Kse1,Kb1),
and the encrypted first edit secret-key Ckse1kb1 is distributed to the first user U1 together with the electronic fingerprint Fe1 of the first edit label Le1. - (9) When the encrypted first edit secret-key Ckse1kb1 and the electronic fingerprint Fe1 of the first edit label Le1 are distributed, the first user U1 decrypts the encrypted first edit secret-key Ckse1kb1 using private-key Kv1 of the first user U1:
Kse1=D(Ckse1kb1,Kv1),
encrypts the first edited data content Me1 using the decrypted first edit secret-key Kse1:
Cme1kse1=E(Me1,Kse1)
and transfers the encrypted first edited data content Cme1kse1 to the second user U2 together with the first edit label Le1, and the electronic fingerprint Fe1 of the first edit label Le1.
- (1)(2) The first user U1 presents the first user label Lu1 to the data management center, collects the original data content M0i (i=1, 2, 3, . . . ) from data content library of the information provider IP in the system and obtains a edit tool Pe. In this case, the original data content M0i and the edit tool Pe are encrypted using public-key Kb1 of the first user U1:
Cm0ikb1=E(M0i,Kb1)
Cpekb1=E(Pe,Kb1)
and the encrypted original data content Cm0ikb1 and the encrypted edit tool Cpekb1 are distributed to the first user U1.
- (3) When the encrypted original data content Cm0ikb1 and the encrypted edit tool Cpekb1 are distributed, the first user U1 decrypts the distributed encrypted original data content Cm0ikb1 and the encrypted edit tool Cpekb1 using private-key Kv1 of the first user U1:
M0i=D(Cm0ikb1,Kv1)
Pe=D(Cpekb1,Kv1).
Using the decrypted edit tool Pe, the decrypted original data content M0i is edited, and a first edited data content M1i (i=1, 2, 3, . . . ) is obtained. - (4) Obtaining the first edited data content M1i, the first user U1 encrypts a first scenario S1i, which is the editing process data content for the first edited data content M1i, using public-key Kbc of the data management center:
Cs1ikbc=E(S1i,Kbc)
and presents the encrypted first scenario Cs1ikbc together with the first user label Lu1 to the data management center, so that secondary copyright of the user U1 is registered. - (5) When the encrypted first scenario Cs1ikbc is presented, the data management center decrypts the encrypted first scenario Cs1ikbc using private-key Kvc of the data management center:
S1i=D(Cs1ikbc,Kvc),
prepares a first edit label Le1 based on the presented user label of the first user U1 and the decrypted first scenario S1i, stores it in the data management center, encrypts the first edit label Le1 using public-key Kb1 of the first user U1:
Cle1kb1=E(Lei,Kb1),
and transfers the encrypted first edit label Cle1kb1 to the first user U1. - (6) When the encrypted first edit label Cle1kb1 is transferred, the first user U1 decrypts the encrypted first edit label Cle1kb1 using private-key Kv1 of the first user U1:
Le1=D(Cle1kb1,Kv1),
encrypts the decrypted first edit label Le1 using public-key Kb2 of the second user U2:
Cle1kb2=E(Le1,Kb2)
and transfers the encrypted first edit label Cle1kb2 to the second user U2, but the first edited data content M1i or the encrypted first edited data content is not transferred to the second user U2.
- (7) When the encrypted first edit label Cle1kb2 is transferred, the second user U2 decrypts the transferred encrypted first edit label Cle1kb2 using the private-key Kv2 of the second user U2:
Le1=D(Cle1kb2,Kv2),
encrypts the first edit label Le1 using the private-Key Kv2 of the second user U2:
Cle1kv2=E(Le1,Kv2)
and presents the encrypted first edit label Cle1kv2 together with the second user label Lu2 to the data management center. - (8) When the encrypted first edit label Cle1kv2 and the second user label Lu2 are presented, the data management center decrypts the presented encrypted first edit label Cle1kv2 using public-key Kb2 of the second user U2:
Le1=D(Cle1kv2,Kb2),
collects the original data content M0i shown on the decrypted first edit label Le1, edits the original data content M0i using the edit tool Pe based on the first scenario S1i described on the first edit label Le1, and reproduces the first edited data content M1i.
Cm1ikb2=E(M1i,Kb2)
Cpekb2=E(Pe,Kb2)
and transfers the encrypted first edited data content Cm1ikb2 and the encrypted edit tool Cpekb2 to the second user U2.
- (9) When the encrypted first edited data content Cm1ikb2 and the encrypted edit tool Cpekb2 are distributed, the second user U2 decrypts the distributed encrypted first edited data content Cm1ikb2 and the encrypted edit tool Cpekb2 using private-key Kv2 of the second user U2:
M1i=D(Cm1ikb2,Kv2)
Pe=D(Cpekb2,Kv2)
and edits the decrypted first edited data content M1i using the decrypted edit tool Pe, and the second edited data content M2i (i=1, 2, 3, . . . ) is obtained. - (10) When the second edited data content M2i is obtained, the second user U2 encrypts the second scenario S2i, which is editing process data content of the second edited data content M2i, using the public-key Kbc of the data management center:
Cs2ikbc=E(S2i,Kbc)
and presents the encrypted second scenario Cs2ikbc together with the second user label Lu2 to the data management center. - (11) When the encrypted second scenario Cs2ikbc is presented, the data management center decrypts the encrypted second scenario Cs2ikbc using the private-key Kvc of the data management center:
S2i=D(Cs2ikbc,Kvc),
prepares a second edit label Le2 based on the presented user label of the second user and the decrypted second scenario S2i, stores it in the data content management center, encrypts the second edit label Le2 using public-key Kb2 of the second user U2:
Cle2kb2=E(Le2,Kb2)
and transfers the encrypted second edit label Cle2kb2 to the second user U2. - (12) When the encrypted second edit label Cle2kb2 is transferred, the second user U2 decrypts the encrypted second edit label Cle2kb2 using private-key Kv2 of the second user U2:
Le2=D(Cle2kb2,Kv2),
encrypts the decrypted second edit label Le2 using public-key Kb3 of the third user U3:
Cle2kb3=E(Le2,Kb3)
and transfers the encrypted second edit label Cle2kb3 to the third user U3.
- (1) The information provider IPi (i=1, 2, 3, . . . ; the same applies hereinafter) encrypts the original data content M0i using an original secret-key K0i:
Cm0iks0i=E(M0i,Ks0i),
encrypts the corresponding original secret-key Ks0i using a public key Kbc of the data content dealing center:
Cks0ikbc=E(Ks0i,Kbc)
and supplies the encrypted original data content Cm0iks0i (shown as “m0i” in the figure) and the encrypted original secret-key Cks0ikbc (shown as “ks0i” in the figure) to the data content dealing center.
Cks0ikb0i=E(Ks0i,Kb0i).
The encrypted original secret-key Cks0ikb0i is distributed to the information provider IPi, who decrypts it using a private-key Kv0i:
Ks0i=D(Cks0ikb0i,Kv0i)
and the decrypted original secret-key Ks0i is used for encryption of the original data content M0i.
Ks0i=D(Cks0ikbc,Kvc),
decrypts the encrypted original data content Cm0iks0i using the decrypted original secret-key Ks0i:
M0i=D(Cm0iks0i,Ks0i)
and stores the decrypted original data content M0i and the corresponding original secret-key Ks0i in the data content database.
- (2) After reviewing the original data content prepared in catalog, a first user U1i presents a first user label Lu1i and a public key Kb1i of the first user U1i, and by specifying the original data content to be utilized, requests for use to the data content dealing center.
- (3) Upon receipt of the request for use of the original data content M0i, the data content dealing center confirms the user label Lu1i to check for fee charging and identification, and then, encrypts the original data content M0i using the corresponding original secret-key Ks0i:
Cm0iks0i=E(M0i,Ks0i),
encrypts the original secret-key Ks0i using a public-key Kb1i of the first user U1i:
Cks0ikb1i=E(Ks0i,Kb1i)
and distributes the encrypte original data content Cm0iks0i and the encrypted original secret-key Cks0ikb1i to the first user U1i, and also charges for the original data content utilization to the first user U1i. - (4) When the encrypted original data content Cm0iks0i and the encrypted original secret-key Cks0ikb1i have been distributed, the first user U1i decrypts the encrypted original secret-key Cks0ikb1i using a private-key Kv1i of the first user U1i:
Ks0i=D(Cks0ikb1i,Kv1i),
decrypts the encrypted original data content Cm0iks0i using the decrypted original secret-key Ks0i:
M0i=D(Cm0iks0i,Ks0i)
and creates a new first edited data content M1i using the decrypted original data content M0i.
- (5) The first edited data content M1i comprises the original data content M0i and a first editing scenario S1i. Further, in some cases, the first user data content Mu1i is added as a comprising element.
Cs1iks1i=W(S1i,Ks1i)
Cmu1iks1i=E(Mu1i,Ks1i),
encrypts the first secret-key Ks1i using a public-key Kbc of the data content dealing center:
Cks1ikbc=E(Ks1i,Kbc)
and transfers the encrypted first editing scenario Cs1iks1i (shown as “s1i” in the figure), the encrypted first user data content Cmu1iks1i (shown as “m1i” in the figure), and the encrypted first secret-key Cks1ikbc (shown as “ks1i” in the figure) to the data content dealing center.
Cks1ikb1i=E(Ks1i,Kb1i)
and the encrypted first secret-key Ck1ikb1i is distributed to the first user U1i. The first user U1i decrypts it using the private-key Kv1i:
Ks1i=D(Cks1ikb1i,Kv1i)
and the decrypted first secret-key K1i is used to encrypt the first editing scenario S1i and the first user data content Mu1i.
Ks1i=D(Cks1ikbc,Kvc)
decrypts the encrypted first editing scenario Cs1iks1i and the encrypted first user data content Cmu1iks1i using the decrypted first secret-key Ks1i:
S1i=D(Cs1iks1i,Ks1i)
Mu1i=D(Cmu1iks1i,Ks1i)
and generates a first user data content label and a first editing scenario label according to the first user label, and the decrypted first secret-key Ks1i, the first editing scenario S1i, the first user data content Mu1i, the first user data content label and the first editing scenario label are stored in the database.
- (6) After reviewing the original data content M0i and the first edited data content M1i prepared in catalog, a second user U2i presents a second user label Lu2i and a public-key Kb2i of the second user U2i. By specifying the original data content M0i and/or the first edited data content M1i to be utilized, a request for use is sent to the data content dealing center.
- (7) Upon receipt of the request for use of the original data content M0i and/or the first edited data content M1i, the data content dealing center confirms the user label Lu2i to check for fee charging and identification. Then, the original data content M0i requested for use, is encrypted using the corresponding original secret-key Ks0i. The first editing scenario S1i and the first user data content Mu1i are encrypted using the first secret-key Ks1i, the original secret-key Ks0i is encrypted using a public-key Kb2i, and the first secret-key Ks1i is encrypted using the public-key Kb2i:
Cm0iks0i=E(M0i,Ks0i)
Cs1iks1i=E(S1i,Ks1i)
Cmu1iks1i=E(Mu1i,Ks1i)
Cks0ikb2i=E(Ks0i,Kb2i)
Cks1ikb2i=E(Ks1i,Kb2i).
Then, the encrypted original data content Cm0iks0i (shown as “m0i” in the figure), the encrypted first editing scenario Cs1iks1i (shown as “s1i” in the figure), the encrypted first user data content Cmu1iks1i (shown as “mu1i” in the figure), the encrypted original secret-key Cks0ikb2i and the encrypted first secret-key Cks1ikb2i are transferred to the second user U2i. And then, the data content dealing center charges for utilization of the original data content M0i and the first editing scenario S1i to the second user U2i. - (8) When the encrypted original data content Cm0iks0i, the encrypted first editing scenario Cs1iks1i, the encrypted first user data content Cmu1iks1i, the encrypted original secret-key Cks01kb2i and the encrypted first secret-key Cks1ikb2i have been transferred, the second user U2i decrypts the encrypted original secret-key Cks0ikb2i and the encrypted first secret-key Cks1ikb2i using a private-key Kv2i of the second user U2i:
Ks0i=D(Cks0ikb2i,Kv2i)
Ks1i=D(Cks1ikb2i,Kv1i).
Next, the encrypted original data content Cm0iks0i is decrypted using the decrypted original secret-key Ks0i, and the encrypted first editing scenario Cs1iks1i and the encrypted first user data content Cmu1iks1i are decrypted using the decrypted first secret-key Ks1i:
M0i=D(Cm0iks0i,Ks0i)
S1i=D(Cs1iks1i,Ks1i)
Mu1i=D(Cmu1iks1i,Ks1i)
and a new second edited data content M2i is created by utilizing the decrypted original data content M0i, the first editing scenario S1i and the first user data content Mu1i.
Cs2iks2i=E(S2i,Ks2i)
Cmu2iks2i=E(Mu2i,Ks2i).
Then, the second secret-key Ks2i is encrypted using the public-key Kbc of the data content dealing center:
Cks2ikbc=E(Ks2i,Kbc)
and the encrypted second editing scenario Cs2iks2i (shown as “s2i” in the figure), the encrypted second user data content Cmu2iks2i (shown as “mu2i” in the figure), and the encrypted second secret-key Cks2ikbc (shown as “ks2i” in the figure) are transferred to the data content dealing center
- (1) The information provider IPi (i=1, 2, 3, . . . ; the same applies hereinafter) encrypts the original data content M0i using an original secret-key K0i:
Cm0iks0i=E(M0i,Ks0i),
encrypts the corresponding original secret-key Ks0i using a public-key Kbc of the data content dealing center:
Cks0ikbc=E(Ks0i,Kbc)
and supplies the encrypted original data content Cm0iks0i (shown as “m0i” in the figure) and the encrypted original secret-key Cks0ikbc (shown as “ks0i” in the figure) to the data content dealing center.
Cks0ikb0i=E(Ks0i,Kb0i).
The encrypted original secret-key Cks0ikb0i is distributed to the information provider IPi, and is decrypted using a private-key Kv0i of the IP:
Ks0i=D(Cks0ikb0i,Kv0i)
and the decrypted original secret-key Ks0i is used for encryption of the original data content M0i.
Ks0i=D(Cks0ikbc,Kvc),
decrypts the encrypted original data content Cm0iks0i using the decrypted original secret-key Ks0i:
M0i=D(Cm0iks0i,Ks0i)
and stores the decrypted original data content M0i and the corresponding original secret-key Ks0i to the data content database.
- (2) After reviewing the original data content, the data content editor Ei presents a data content editor label Lei and a public-key Kb1i of the data content editor Ei, and requests for utilization by specifying the original data content to be utilized, to the data content dealing center.
- (3) Upon receipt of the request for utilization of the original data content M0i, the data content dealing center confirms the user label Lei to check for fee charging and identification. Then, the original data content M0i is encrypted using the corresponding original secret-key Ks0i:
Cm0iks0i=E(M0i,Ks0i),
encrypts the original secret-key Ks0i using a public-key Kbei of the data content editor Ei:
Cks0ikbei=E(Ks0i,Kbei)
and distributes the encrypted original data content Cm0iks0i and the encrypted original secret-key Cks0ikbei to the data content editor Ei, and further, charges a fee for the original data content utilization to the data content editor Ei and an end user. - (4) When the encrypted original data content Cm0iks0i and the encrypted original secret-key Cks0ikbei have been distributed, the data content editor Ei decrypts the encrypted original secret-key Cks0ikbei using a private-key Kvei of the data content editor Ei:
Ks0i=E(Cks0ikbei,Kvei),
decrypts the encrypted original data content Cm0iks0i using the decrypted original secret-key Ks0i:
M0i=D(Cm0iks0i,Ks0i)
and creates an edited data content Mei utilizing the decrypted original data content M0i.
- (5) The edited data content Mei comprises the original data content M0i and the editing scenario Sei. Further, in some cases, the editor's data content is added as a comprising element.
Cseiksei=E(Sei,Ksei)
Smediksei=E(Medi,Ksei)
and encrypts the secret-key Ksei using the public-key Kbc of the data content dealing center:
Ckseikbc=E(Ksei,Kbc).
Then, the encrypted editing scenario Cseiksei (shown as “sei” in the figure), the encrypted editor's data content Cmeiksei (shown as “mei” in the figure), and the encrypted secret-key Ckseikbc (shown as “ksei” in the figure) are transferred to the data content dealing center.
Ckseikbei=E(Ksei,Kbei)
and the encrypted secret-key Ckseikbei is distributed to the data content editor Ei. The data content editor Ei decrypts it using own private-key Kvei:
Ksei=D(Ckseikbei,Kvei)
and the decrypted secret-key Ksei is used to encrypt the editing scenario Sei and the data content editor's data content Medi.
Ksei=D(Ckseikbc,Kvc).
Then, the encrypted editing scenario Cseiksei and the encrypted editor's data content Cmediksei are decrypted using the decrypted secret-key Ksei:
Sei=D(Cseiksei,Ksei)
Medi=D(Cmediksei,Ksei).
Then, a copyright label based on the data content editor label Lei is added to each of the decrypted secret-key Ksei, the editing scenario Sei and the editor's data content Medi, and these are stored in the database.
- (6) After reviewing the edited data content Mei prepared in catalog, each of a plurality of editing scenario sellers Di presents an editing scenario seller label Ldi and a public-key Kbdi of the editing scenario seller Di and requests to purchase the editing scenario Sei and the editor's data content Medi to the editing scenario market management center.
- (7) Upon receipt of the request to purchase the editing scenario Sei and the editor's data content Medi, the editing scenario market management center confirms the editing scenario seller label Ldi to check for fee charging and identification, performs the auction in the market, and sells the utilization right of the editing scenario Sei and the editor's data content Medi to a plurality of editing scenario sellers Di.
Cksdikbc=E(Ksdi,Kbc)
and transfers the encrypted secret-key Cksdikbc (shown as ksdi in the figure) to the editing scenario market management center.
- (8) The editing scenario market management center decrypts the presented encrypted secret-key Cksdikbc using the private-key Kvc of the data content dealing center:
Ksdi=D(Cksdikbc,Kvc)
encrypts the editing scenario Sei and the editor's data content Medi using the decrypted secret-key Ksdi of the editing scenario seller Di:
Cseiksdi=E(Sei,Ksdi)
Cmediksdi=E(Medi,Ksdi)
and sends the encrypted editing scenario Cseiksdi and encrypted editor's data content Cmediksdi to the editing scenario seller Di.
Claims (4)
Priority Applications (2)
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US10/170,677 USRE41657E1 (en) | 1994-10-27 | 2002-06-13 | Data management system |
US11/701,943 USRE43599E1 (en) | 1994-10-27 | 2007-02-01 | Data management system |
Applications Claiming Priority (6)
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JP26420194 | 1994-10-27 | ||
JP6-264201 | 1994-10-27 | ||
US08/549,271 US5646999A (en) | 1994-10-27 | 1995-10-27 | Data coypright management method |
US08/733,504 US5974141A (en) | 1995-03-31 | 1996-10-18 | Data management system |
US08/846,661 US6076077A (en) | 1995-10-27 | 1997-04-29 | Data management system |
US10/170,677 USRE41657E1 (en) | 1994-10-27 | 2002-06-13 | Data management system |
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US08/846,661 Reissue US6076077A (en) | 1994-10-27 | 1997-04-29 | Data management system |
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US08/846,661 Division US6076077A (en) | 1994-10-27 | 1997-04-29 | Data management system |
Publications (1)
Publication Number | Publication Date |
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USRE41657E1 true USRE41657E1 (en) | 2010-09-07 |
Family
ID=17399897
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US08/888,074 Expired - Lifetime US6097818A (en) | 1994-10-27 | 1997-07-03 | Data copyright management method |
US09/546,177 Expired - Lifetime US6272635B1 (en) | 1994-10-27 | 2000-04-10 | Data copyright management system |
US09/873,453 Expired - Lifetime US6463536B2 (en) | 1994-10-27 | 2001-06-05 | Data copyright management system |
US10/152,584 Expired - Lifetime US6721887B2 (en) | 1994-10-27 | 2002-05-23 | Data copyright management system |
US10/170,677 Expired - Lifetime USRE41657E1 (en) | 1994-10-27 | 2002-06-13 | Data management system |
US11/701,943 Expired - Lifetime USRE43599E1 (en) | 1994-10-27 | 2007-02-01 | Data management system |
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Application Number | Title | Priority Date | Filing Date |
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US08/549,271 Expired - Lifetime US5646999A (en) | 1994-10-27 | 1995-10-27 | Data coypright management method |
US08/888,074 Expired - Lifetime US6097818A (en) | 1994-10-27 | 1997-07-03 | Data copyright management method |
US09/546,177 Expired - Lifetime US6272635B1 (en) | 1994-10-27 | 2000-04-10 | Data copyright management system |
US09/873,453 Expired - Lifetime US6463536B2 (en) | 1994-10-27 | 2001-06-05 | Data copyright management system |
US10/152,584 Expired - Lifetime US6721887B2 (en) | 1994-10-27 | 2002-05-23 | Data copyright management system |
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Application Number | Title | Priority Date | Filing Date |
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US11/701,943 Expired - Lifetime USRE43599E1 (en) | 1994-10-27 | 2007-02-01 | Data management system |
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US (7) | US5646999A (en) |
EP (3) | EP1691316A1 (en) |
JP (2) | JPH08272745A (en) |
DE (1) | DE69535013T2 (en) |
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DE69535013T2 (en) | 2006-12-28 |
EP1691316A1 (en) | 2006-08-16 |
US20010027522A1 (en) | 2001-10-04 |
US6272635B1 (en) | 2001-08-07 |
EP0709760A2 (en) | 1996-05-01 |
US5646999A (en) | 1997-07-08 |
JP4101263B2 (en) | 2008-06-18 |
US20020178372A1 (en) | 2002-11-28 |
EP0709760B1 (en) | 2006-05-31 |
US6463536B2 (en) | 2002-10-08 |
JPH08272745A (en) | 1996-10-18 |
US6097818A (en) | 2000-08-01 |
EP0709760A3 (en) | 1999-02-03 |
JP2006085725A (en) | 2006-03-30 |
EP1691315A1 (en) | 2006-08-16 |
DE69535013D1 (en) | 2006-07-06 |
US6721887B2 (en) | 2004-04-13 |
USRE43599E1 (en) | 2012-08-21 |
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