How I can confirm that cross certify Lotus messages are comply with TDES encryption strength (and the ciphertext form acceptable is encrypted using the KEK)?
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Are you using Blackberry? As this deals with the 3DES Encryption.
http://www-10.lotus.com/ldd/dominowiki.nsf/dx/understanding-mail-routing-between-ibm-lotus-domino-server-and-blackberry-handheld-devices
No, this question is arise in connection with PCI DSS requirements by KEY distribution via Lotus Notes cross-certify messages.
You mean TLS?