E-Trust IDES Tool Release Version 1.1.0 for FATCA submission with CBC encryption

  • 9 July 2016

To improve security, the Internal Revenue Service (IRS) decided to adopt a stronger algorithm - Cipher Block Chaining (CBC), for data encryption. Beginning Monday July 11, 2016 at 12:00 AM EDT, all FATCA submission through IDES must employ the CBC cipher mode for AES encryption of payload files. All files using ECB cipher mode after July 11, 2016 will be rejected.


Sunnic team has released E-Trust IDES Tool version 1.1.0 to support this new cipher mode. User must upgrade to this new version in order to package FATCA data with new cipher mode. Please login in to our webportal to download the latest software immediately.


Release note of version 1.1.0.


1) Renew the trial license

2) Add support for Cipher Block Chaining (CBC)

3) Add TIN validation

4) Improvied UI for decrypted response messages

5) Add Summission Summary feature

6) Bug fixes and other enhancements