Patent US1065835A successfully refreshed from Google Patents.
EP0886409A2
Expired / Lapsed
EP
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Information providing system
Assignee: Panasonic Corp
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Filing: 1998-04-30
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Granted: —
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Expires: 2018-04-30
Abstract
Abstract An information providing system comprises an encryption unit for encrypting content data using a first key. The first key is included in message data which is associated with the content data and is separately transmitted to a user site. The message data is also encrypted using a second key within a security module. The second key is further encrypted using a third key within the security module. The third key is never read out to the outside of the security module.
Inventors
- 👤 Hirofumi Muratani
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 14:06
CPC Classifications
H; H04; H04L; H04L63/00; H04L63/04; H04L63/0428; H04L63/0435; G; G06; G06F; G06F21/00; G06F21/60; G06F21/62; G06F21/6218; H04L63/0442; H04L63/08; H04L63/0823; H04L9/00; H04L9/08; H04L9/0816; H04L9/0819; H04L9/0822; H04L9/0894; H04L9/0897; G06F2211/00; G06F2211/007; G06F2221/00; G06F2221/21; G06F2221/2107; G06F2221/2153; H04L2209/00; H04L2209/60
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
137 words
An information providing system comprising: a provider device for providing information to
users; a user device for utilizing information; and an information storage card adapted to be
connected to the provider device and the user device
and comprising means for storing a second key, characterized in that the provider device comprises means (42) for
sending to the user device, a service package that
describes information necessary for utilization of the
provided information, the service package being
encrypted in accordance with a first encryption system,
and means (40) for sending to the user device, a first
key used in the first encryption system, the first key
being encrypted using the second key which is stored in
the information storage card; and the user device comprises means (54) for
decrypting the encrypted first key within the
information storage card.
Claim 2
Dependent Claim
34 words
The information providing system according to
claim 1, characterized in that the service package
after decryption is disabled from being retained within
the user device or being output from the user device to
outside.
Claim 3
Dependent Claim
39 words
The information providing system according to
claim 2, characterized in that the encrypted service
package is decrypted within the information storage
card and the decrypted service package is disabled from
being output to outside of the information storage card.
Claim 4
Dependent Claim
69 words
The information providing system according to
claim 2, characterized in that the user device
comprises service package decryption means (60) for
decrypting the encrypted service package and means for
disabling the service package decryption means from
decrypting the encrypted service package when it is not
guaranteed that the decrypted service package should
not be retained within the user device nor be output to
the outside of the user device.
Claim 5
Dependent Claim
90 words
The information providing system according to
claim 1, characterized in that the service package
comprises information (16) for identifying information
to be provided, information (14) for identifying an
application program that utilizes the information to be
provided, and information (12) indicating a charging
policy relating to the utilization of the information
to be provided, and the user device comprises an
application program execution unit (62) that operates
in response to the decrypted application program
identifying information, a charging unit that operates
in response to the decrypted charging policy
identifying information.
Claim 6
Dependent Claim
38 words
The information providing system according to
claim 5, characterized in that the application program
execution unit is implemented by an application program,
and the charging unit is implemented by a platform that
is different from the application program.
Claim 7
Dependent Claim
39 words
The information providing system according to
claim 5, characterized in that said provider device
comprises means for sending to the user device, a
second charging policy identical to the charging policy
contained in the encrypted service package without
encryption.
Claim 8
Dependent Claim
27 words
The information providing system according to
claim 1, characterized in that the first key used in
the first encryption system is generated in the
information storage card.
Claim 9
Dependent Claim
34 words
The information providing system according to
claim 1, characterized in that the first key used in
the first encryption system is generated by an
authorized agent and is written into the information
storage card.
Claim 10
Dependent Claim
67 words
The information providing system according to
claim 1, characterized in that the provider device
comprises means for sending a ticket to the user device,
the ticket associating information identifying the
service package with information identifying a key used
to encrypt that service package and the user device
comprises means for identifying a key associated with
the service package to be utilized on the basis of the
ticket.
Claim 11
Dependent Claim
33 words
The information providing system according to
claim 1, which further comprises a repeater unit for
receiving the message data from the provider device and
transmitting the received message data to the user
device.
Claim 12
Dependent Claim
130 words
An information providing system comprising: a provider device for providing information to
users; a user device for utilizing information; and a security module adapted to be connected to the
provider device and the user device and comprising
means for storing a second key in such a way that it
cannot be read out to outside, characterized in that the provider device comprises means (42) for
sending to the user device, a service package that
describes information necessary for utilization of
information, the service package being encrypted in
accordance with a first encryption system, a first key
used in the first encryption system being encrypted
using the second key stored in the security module; and the user device comprises means (54) for
decrypting the encrypted first key within the security
module.
Claim 13
Dependent Claim
82 words
An information providing device for providing
information to users with an information storage card
for storing a second key, the device comprising: means (42) for transmitting, a service package
that describes information necessary for utilization of
the provided information, the service package being
encrypted in accordance with a first encryption system;
and means (40) for transmitting a first key used in
the first encryption system, the first key being
encrypted using the second key which is stored in the
information storage card.
Claim 14
Dependent Claim
72 words
An information providing system for providing
content data and message data in association with the
content data, characterized by comprises: means (314) for calculating an value of a
unidirectional function or unidirectional hash function
to which the whole message data or parts of the message
data are input; and means for encrypting the content data to be
provided using the value of the unidirectional function
or unidirectional hash function as a key.
Claim 15
Dependent Claim
22 words
The information providing system according to
claim 14, characterized by further comprising means for
attaching the message data with a digital signature.
Claim 16
Dependent Claim
26 words
The information providing system according to
claim 14, characterized in that the message data
contains charging information concerning a charge for
usage of the content data.
Claim 17
Dependent Claim
32 words
The information providing system according to
claim 14, characterized in that the message data
contains data described in a format including SGML,
HTML, MHEG, or XML, and their extended or limited
format.
Claim 18
Dependent Claim
124 words
An information utilization device for use with
an information providing system in which content data
and its associated message data are provided and the
content data is encrypted, the device comprising: means for calculating a first value of a
unidirectional function or unidirectional hash function
to which the whole message data or parts of the message
data are input, a second value of a key generation
function to which the first value is input, or a third
value of a key generation function to which the first
value and data included in the associated message or
stored in the device are input; and means for decrypting the encrypted content data
using the value of the unidirectional function or
unidirectional hash function as a key.
Claim 19
Dependent Claim
20 words
The information utilization device according
to claim 18, characterized in that the message data is
attached with a digital signature.
Claim 20
Dependent Claim
26 words
The information utilization device according
to claim 18, characterized in that the message data
contains charging information concerning a charge for
usage of the content data.
Claim 21
Dependent Claim
32 words
The information utilization device according
to claim 18, characterized in that the message data
contains data described in a format including SGML,
HTML, MHEG, or XML, and their extended or limited
format.
Claim 22
Dependent Claim
183 words
An information providing system characterized
by comprising: an information providing device which, in
encrypting content data using an encryption key, uses a
first value of a unidirectional function or unidirectional
hash function to which the whole message data or
parts of the message data are input, a second value of
a key generation function to which the first value is
input, or a third value of a key generation function to
which the first value and data included in the
associated message or stored in the device are input,
as the encryption key and transmitting the encrypted
content data; a repeater unit for receiving the message data
from the information providing device and transmitting
the received message data; and an information utilization device which, in
decrypting the encrypted content data transmitted from
the information providing device using an decryption
key, uses a value of a unidirectional function or
unidirectional hash function to which the whole message
data or parts of the message data associated with the
content data and transmitted from the information
providing device or the repeater unit as the decryption
key.
Claim 23
Dependent Claim
40 words
The information providing system according to
claim 22, characterized in that the information
providing device encrypts the message data, and the
repeater unit decrypts the received encrypted message
data, encrypts the message data again and transmits the
encrypted message data.
Claim 24
Dependent Claim
48 words
The information providing system according to
claim 22, characterized in that the information
providing device sends the message data with a
provider's signature attached, and the repeater unit
verifies the signature on the received message data and
transmits the message data with a message data
receiver's signature attached.
Claim 25
Dependent Claim
23 words
The information providing system according to
claim 22, characterized in that the repeater unit is in
the form of the information utilization device.
Claim 26
Dependent Claim
67 words
An encryption device for encrypting content
data and its associated message data to be separately
transmitted, characterized by comprising: means for calculating an value of a unidirectional
function or unidirectional hash function to which the
whole message data or parts of the message data are
input; and means for encrypting the content data using the
value of the unidirectional function or unidirectional
hash function as a key.
References Cited (Backward Citations)
US5590199A
Cited
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