Methods and apparatus for adaptively determining trust in client-server environments
View Patent ↗Techniques are disclosed for adaptively determining trust in client-server environments. By way of example, a method for assigning a trust level to a client in a client-server environment including at least one client communicating with a plurality of servers includes the following steps. Information associated with a server s 1 and a server s 2 different from s 1 is obtained regarding a request r 1 sent by a client and received by s 1 and a request r 2 sent by the client and received by s 2 . The obtained information is utilized to assign at least one trust level to the client.
1. In a client-server environment comprising at least one client communicating with a plurality of servers, a method for assigning a trust level to a client, the method comprising the steps of: obtaining trust information associated with a server s 1 providing a first service and a server s 2 providing a second service different from s 1 , with regard to a request r 1 sent by a client and received by s 1 and a request r 2 sent by the client and received by s 2 ; and aggregating the obtained trust information from s 1 and s 2 with regard to the client to assign at least one trust level to said client, wherein a trust level is assigned by a server X to a client c using a formula:
TRUST
(
c
,
X
)
=
∑
i
∈
SC
[
Pos
(
c
,
i
)
+
0.2
·
Neu
(
c
,
i
)
-
4.0
·
Neg
(
c
,
i
)
]
wherein SC=set of server classes, X=at least S 1 and S 2 , Pos (c, i)=number of positive feedback units assigned to client c by server class i, Neu (c, i)=number of neutral feedback units assigned to client c by server class i, and Neg (c, i)=number of negative feedback units assigned to client c by server class i.
2. The method of claim 1 , wherein the at least one trust level is used to assign a level of access to the client by at least one of the servers.
3. The method of claim 1 , wherein the at least one trust level is used to assign a level of service to the client by at least one of the servers.
4. The method of claim 1 , wherein the at least one trust level is computed by considering trust information from previous requests to the servers.
5. The method of claim 1 , wherein at least one trust level is computed by considering information summarizing trust information from previous requests to said servers.
6. The method of claim 1 , wherein at least two servers use different methods for computing trust levels from the same trust information.
7. The method of claim 1 , wherein at least two different trust levels are computed for the client using a same method at different times.
8. The method of claim 1 , wherein a trust level is assigned by a server j to a client c using a formula:
TRUST
(
c
,
j
)
=
∑
i
∈
SC
TF
(
i
,
j
)
·
[
w
pos
(
j
)
·
Pos
(
c
,
i
)
+
w
neu
(
j
)
·
Neu
(
c
,
i
)
+
w
neg
(
j
)
·
Neg
(
c
,
i
)
]
wherein
SC=set of server classes,
Pos(c,i)=number of positive feedback units assigned to client c by server class i,
Neu(c,i)=number of neutral feedback units assigned to client c by server class i,
Neg(c,i)=number of negative feedback units assigned to client c by server class
w pos (j)=weight assigned to positive feedback by server j,
w neu (i)=weight assigned to neutral feedback by server j,
w neg (j)=weight assigned to negative feedback by server j, and
TF(i,j)=trust factor assigned to server class i by server j.
9. The method of claim 1 , wherein a trust level is assigned by a server W to a client c using a formula:
TRUST( c,W )=Pos( c,P )−Neg( c,P )
wherein
Pos(c,i)=number of positive feedback units assigned to client c by server class i, and
Neg(c,i)=number of negative feedback units assigned to client c by server class i.
10. An article of manufacture for assigning a trust level to a client in a client-server environment comprising at least one client communicating with a plurality of servers, the article comprising a non-transitory computer readable tangible storage medium including one or more programs which when executed by a computer perform the steps of claim 1 .
11. In a client-server environment comprising at least one client communicating with a plurality of servers, apparatus for assigning a trust level to a client, the apparatus comprising: one or more memories; and one or more processors coupled to the one or more memories and operative to: (i) obtain trust information associated with a server s 1 providing a first service and a server s 2 providing a second service, different from s 1 , with regard to a request r 1 sent by a client and received by s 1 and a request r 2 sent by the client and received by s 2 ; and (ii) aggregate the obtained trust information from s 1 and s 2 with regard to the client to assign at least one trust level to said client, wherein a trust level is assigned by a server X to a client c using a formula:
TRUST
(
c
,
X
)
=
∑
i
∈
SC
[
Pos
(
c
,
i
)
+
0.2
·
Neu
(
c
,
i
)
-
4.0
·
Neg
(
c
,
i
)
]
wherein SC=set of server classes, X=at least S 1 and S 2 , Pos (c, i)=number of positive feedback units assigned to client c by server class i, Neu (c, i)=number of neutral feedback units assigned to client c by server class i, and Neg (c, i)=number of negative feedback units assigned to client c by server class i.
12. The apparatus of claim 11 wherein said at least one trust level is used to assign a level of access to said client by at least one of said servers.
13. The apparatus of claim 11 , wherein at least one trust level is used to assign a level of service to said client by at least one of said servers.
14. The apparatus of claim 11 , wherein at least one trust level is computed by considering trust information from previous requests to said servers.
15. The apparatus of claim 11 , wherein at least one trust level is computed by considering information summarizing trust information from previous requests to said servers.
16. The apparatus of claim 11 , wherein at least two servers use different methods for computing trust levels from the same trust information.
17. The apparatus of claim 11 , wherein at least two different trust levels are computed for the client using a same method at different times.
18. In a client-server environment comprising at least one client communicating with a plurality of servers, a method for assigning a trust level to a client, comprising the steps of: the client sending requests to the plurality of servers in which at least one request r 1 is received by a server s 1 providing a first service and at least one request r 2 is received by a server s 2 providing a second service different from s 1 ; sharing trust information between s 1 and s 2 regarding r 1 and r 2 of said client; and aggregating the shared trust information between s 1 and s 2 with regard to the client to assign at least one trust level to the client, wherein a trust level is assigned by a server X to a client c using a formula:
TRUST
(
c
,
X
)
=
∑
i
∈
SC
[
Pos
(
c
,
i
)
+
0.2
·
Neu
(
c
,
i
)
-
4.0
·
Neg
(
c
,
i
)
]
wherein SC=set of server classes, X=at least S 1 and S 2 , Pos (c, i)=number of positive feedback units assigned to client c by server class i, Neu (c, i)=number of neutral feedback units assigned to client c by server class i, and Neg (c, i)=number of negative feedback units assigned to client c by server class i.
19. The method of claim 18 , wherein the at least one trust level is used to assign at least one of a level of access and a level of service to the client by at least one of the servers.