Xact File Transfer: Infrastructure upgrade



1 June 2019

Clearstream Banking1 will disable the DH-1024 cipher on the Xact File Transfer server.

DH cipher length

DH ciphers with a cipher length of 1024 are no longer considered secure and will therefore be disabled on the Xact File Transfer server.

There is no impact expected for customers using a standard configuration as recent file transfer clients already support newer ciphers and these will automatically be used if enabled in the client software.

All customers are encouraged to test their client software in the Customer Testing Environment (CTE) or in the OCCT Environment in order not to risk service interruption.

Further information

For further information, please contact the Clearstream Connectivity Helpdesk.


1. Clearstream Banking refers collectively to Clearstream Banking S.A., registered office at 42, avenue John F. Kennedy, L-1855 Luxembourg, and registered with the Luxembourg Trade and Companies Register under number B-9248, and Clearstream Banking AG, registered office at 61, Mergenthalerallee, 65760 Eschborn, Germany and registered in Register B of the Amtsgericht Frankfurt am Main, Germany under number HRB 7500.