TNS Database Error Messages TNS-02520: encryption/crypto-checksumming: no Diffie-Hellman seed November 5, 2020 mpbod TNS-02520: encryption/crypto-checksumming: no Diffie-Hellman seed Cause: The sqlnet.crypto_seed parameter is missing from the SQLNET.ORA parameters file for SQL*Net. Action: Add this line to SQLNET.ORA: sqlnet.crypto_seed = "randomly-chosen text" Back to previous menu https://support.oracle.com/ http://www.oracle.com/ Share this:Click to email a link to a friend (Opens in new window)Click to print (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on Tumblr (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on Pinterest (Opens in new window)Click to share on Reddit (Opens in new window)Click to share on Pocket (Opens in new window)