Data Element & Code Sets Directory
Use of algorithm, coded
 
Specification of the usage made of the algorithm.
       
   
S
Old Code
 
+
1
=
Owner hashing
Specifies that the algorithm is used by the message sender to compute the hash function on the message (as in the case of Integrity or Non-repudiation of Origin identified in the security function qualifier of USH).
S4
   
 
2
=
Owner symmetric
Specifies that the algorithm is used by the message sender either for integrity, confidentiality, or message origin authentication (specified by security service, coded in USH).
     
 
3
=
Issuer signing
Specifies that the algorithm is used by the Certificate Issuer (CA) to sign the hash result computed on the certificate.
     
 
4
=
Issuer hashing
Specifies that the algorithm is used by the Certificate Issuer (CA) to compute the hash result on the certificate.
     
 
5
=
Owner enciphering
Specifies that the algorithm is used by the message sender to encrypt a symmetric key.
     
+
6
=
Owner signing
Specifies that the algorithm is used by the message sender to sign either the hash result computed on the message or the symmetric keys.
S4
   
 
7
=
Owner enciphering or signing
Specifies that the algorithm may be used by the message sender either to encrypt a symmetric key or sign the hash result computed on the  message. This value may only be used in a USA segment within a USC segment group. When encrypting a symmetric key a receiver certificate shall be used. When signing a hash result a sender certificate shall be used.
     
 
8
=
Owner compressing
Specifies that the algorithm is used by the message sender to compress the data before (encryption and) submission.
     
 
9
=
Owner compression integrity
Specifies that the algorithm is used by the message sender on the compressed data before (encryption and) submission. The integrity value is used to verify the contents of the compressed text before expansion.
     
 
10
=
Key agreement
Specifies that the algorithm is used by the initiator and responder to agree a secret key.
     
 
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Edition 2016 Upd. 2021