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Scope: Core (OPC-10000-*) All specs

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OPC-10000-4 – OPC Unified Architecture - Part 4: Services

5.5.1 Overview

using FindServers is illustrated in Figure 9 . The establishment of a SecureChannel (with MessageSecurityMode NONE ) for FindServers and GetEndpoints is omitted from the figure for clarity. Figure 9 - Discovery process
OPC-10000-4 – OPC Unified Architecture - Part 4: Services

5.5.4.1 Description

passed to the Server in the ActivateSession request (see 5.7.3 ). If the securityPolicyUri is None and none of the UserTokenPolicies requires encryption, the Client shall ignore the ApplicationInstanceCertificate ... securityPolicyUri is not None or one of the UserTokenPolicies requires encryption, the Server shall include the ApplicationInstanceCertificate in the EndpointDescription . Each EndpointDescription also specifies a URI for the Transport Profile
OPC-10000-4 – OPC Unified Architecture - Part 4: Services

5.6.2.2 Parameters

this Certificate . The ApplicationInstanceCertificate type is defined in 7.3 . If the securityPolicyUri is None, the Server shall ignore the ApplicationInstanceCertificate . requestType Enum SecurityToken RequestType The type of SecurityToken request ... SecureChannel may need to be created even if the securityMode is NONE . The exact behaviour depends on the mapping used and is described in the OPC 10000-6 . securityPolicyUri String
OPC-10000-4 – OPC Unified Architecture - Part 4: Services

5.7.2.2 Parameters

Client . The ApplicationInstanceCertificate type is defined in 7.3 . If the securityPolicyUri is None, the Server shall ignore the ApplicationInstanceCertificate . If the SecurityMode is not None, a Client shall prove possession ... Nonce provided by the Server in the response. If the SecurityMode is not None, the Server shall verify that this ApplicationInstanceCertificate is the same as the one it used
OPC-10000-4 – OPC Unified Architecture - Part 4: Services

7.40.2.1 Overview

Client uses the SecurityPolicy in the EndpointDescription . If the matching SecurityPolicy is set to None then no encryption or signature is required. The possible SecurityPolicies are defined ... recommended that applications never set the SecurityPolicy to None for UserIdentityTokens that include a secret because these secrets could be used by an attacker to gain access to the system
OPC-10000-4 – OPC Unified Architecture - Part 4: Services

7.40.4 UserNameIdentityToken

should specify a SecurityPolicy for the UserTokenPolicy if the SecureChannel has a SecurityPolicy of None and no transport layer encryption is available. If None is specified for the UserTokenPolicy ... SecurityPolicy is None then the password only contains the UTF-8 encoded password. The SecurityPolicy of the SecureChannel is used if no SecurityPolicy is specified in the UserTokenPolic
OPC-10000-4 – OPC Unified Architecture - Part 4: Services

7.40.6 IssuedIdentityToken

should specify a SecurityPolicy for the UserTokenPolicy if the SecureChannel has a SecurityPolicy of None and no transport layer encryption is available. The SecurityPolicy of the SecureChannel is used ... SecurityPolicy is specified in the UserTokenPolic y. If the SecurityPolicy is not None , the tokenData shall be encoded in UTF-8 (if it is not already binary), signed and encrypted
OPC-10000-4 – OPC Unified Architecture - Part 4: Services

7.41 UserTokenPolicy

only be returned in EndpointDescription with an RSA ServerCertificate. If the SecurityMode is None, SecurityPolicies based on ECC or RSA_DH are not allowed and Clients shall not use UserTokenPolicies ... trusts to encrypt UserIdentityTokens with tokenType USERNAME or ISSUEDTOKEN. If the SecurityMode is not None , USERNAME and ISSUEDTOKEN UserTokenPolicies should specify the same SecurityPolicy as the EndpointDescription or should
OPC-10000-6 – OPC Unified Architecture - Part 6: Mappings

4 Overview

HTTP . The SecureChannel layer is always present even if the SecurityMode is None . In this situation, no security is applied but the SecurityProtocol implementation shall maintain a logical channel with ... Users and administrators are expected to understand that a SecureChannel with SecurityMode set to None cannot be trusted unless the application is operating on a physically secure network
OPC-10000-6 – OPC Unified Architecture - Part 6: Mappings

6.1 Security Handshake and Security Policies

algorithms applied to them are shown in Figure 10 . SecurityProtocols shall support three SecurityModes : None , Sign and SignAndEncrypt . If the SecurityMode is None then no security is used
OPC-10000-6 – OPC Unified Architecture - Part 6: Mappings

6.7.4 Establishing a SecureChannel

supported. The OpenSecureChannel Messages are signed and encrypted if the SecurityMode is not None (even if the SecurityMode is Sign). The Nonces shall be cryptographic random numbers with a length ... number generators. The OpenSecureChannel Messages are not signed or encrypted if the SecurityMode is None . The Nonces are ignored and should be set to null. The SecureChannelId and the TokenId
OPC-10000-6 – OPC Unified Architecture - Part 6: Mappings

7.4.1 Overview

algorithms used for signing the Nonces during the CreateSession / ActivateSession handshake. A SecurityPolicy of None indicates that the Nonces are not signed. The SecurityMode is set to Sign unless ... SecurityPolicy is None ; in this case the SecurityMode shall be set to None . If a UserIdentityToken is to be encrypted, it shall be explicitly specified in the UserTokenPolicy. An HTTP
OPC-10000-12 – OPC Unified Architecture - Part 12: Discovery and Global Services

7.10.24 SecuritySettingsDataType

Certificates that are assigned to a Server . When generating EndpointDescriptions any SecurityPolicyUris (other than None ) that are not valid for one of the Certificates associated with the CertificateGroup are ignored ... CertificateGroup, then an EndpointDescription is generated for each Certificate. EndpointDescriptions generated with a None SecurityMode only use the SecurityPolicyUris and the CertificateGroupName to restrict the SecurityPolicies that may be used
OPC-10000-14 – OPC Unified Architecture - Part 14: PubSub

6.2.3.7.1 PublishedData

DeadbandType UInt32 A value that defines the Deadband type and behaviour. Value Description None No Deadband calculation should be applied. Absolute AbsoluteDeadband (This type is specified
OPC-10000-14 – OPC Unified Architecture - Part 14: PubSub

6.2.5.3 SecurityGroupId

unique within a SKS. The parameter is null if the SecurityMode is NONE . If the SecurityMode is not NONE the SecurityGroupId identifies the SecurityGroup . The SecurityGroup defines the SecurityPolicy
OPC-10000-14 – OPC Unified Architecture - Part 14: PubSub

6.2.5.4 SecurityKeyServices

defined in OPC 10000-4 . The parameter is null if the SecurityMode is NONE . Each element in the array is an Endpoint for an SKS that can supply the security
OPC-10000-14 – OPC Unified Architecture - Part 14: PubSub

7.2.4.3 Error handling

Subscriber is configured for SecurityMode SIGN it shall drop messages with NONE . A Subscriber may process messages with a higher SecurityMode e.g. it is allowed to process messages with SecurityMode ... SIGN if it is configured for NONE
OPC-10000-14 – OPC Unified Architecture - Part 14: PubSub

7.2.4.4.2 NetworkMessage layout

NetworkMessage Signed Bit 1: NetworkMessage Encrypted The configuration options for MessageSecurityMode are NONE , SIGN and SIGNANDENCRYPT . Therefore bit 0 shall be true if bit 1 is true. Bit 2: SecurityFooter
OPC-10000-14 – OPC Unified Architecture - Part 14: PubSub

9.1.6.2 PubSubGroupType

defined in 6.2.5.2 . The SecurityGroupId is defined in 6.2.5.3 . If the SecurityMode is not NONE , the Property shall provide the SecurityGroupId . The value of the Property is null ... Property is not present if the SecurityMode is NONE . The SecurityKeyServices parameter is defined in 6.2.5.4 . If the SecurityMode is not NONE , the Property shall provide the list of Security
OPC-10000-17 – OPC Unified Architecture - Part 17: Alias Names

D.1.3 PubSub AliasName Notification Configuration

SecurityMode that is associated with the published messages. It is the type of security ( None , Sign , SignAndEncrypt ) assigned to the messages. The SecurityGroupId that is associated with the published messages
OPC-10000-22 – OPC Unified Architecture - Part 22: Base Network Model

5.3.1.7 TsnTalkerStatus Enumeration

enumeration representing the state of the TSN Talker configuration. The default value is None . The TsnTalkerStatus Enumeration is defined in Table 30 Table 30. Table 30 - TsnTalkerStatus Values Name Value ... Description None 0 No Talker detected. Ready 1 Talker ready (configured). Failed 2 Talker failed. Its representation in the AddressSpace is defined in Table 31 Table 31. Table 31 - TsnTalkerStatus
OPC-10000-22 – OPC Unified Architecture - Part 22: Base Network Model

5.3.1.8 TsnListenerStatus Enumeration

enumeration representing the state of the TSN Listener configuration. The default value is None . The TsnListenerStatus Enumeration is defined in Table 32 Table 32. Table 32 - TsnListenerStatus Values Name Value ... Description None 0 No Listener detected. Ready 1 Listener ready (configured). PartialFailed 2 One or more Listeners ready, and one or more Listeners failed. Failed 3 Listener failed. Its representation
OPC-10000-22 – OPC Unified Architecture - Part 22: Base Network Model

5.3.2.2 LldpManagementAddressTxPortType

unititialized. The IfSubtype is an optional Enumeration element and shall be set to None if this variable is uninitialized. The IfId is an optional element and shall
OPC-10000-22 – OPC Unified Architecture - Part 22: Base Network Model

5.3.2.3 LldpManagementAddressType

Address are mandatory. The IfSubtype is an optional variable and shall be set to None if this variable is unset. The IfId is an optional variable and shall