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Thunderbird S/MIME encryption using Elliptic Curve Cryptography (ECC)
I tried to encrypt an email message (S/MIME) using ECC NIST P-256 key (with matched X509 certificate) that is stored on smart card applet but I have got error:
"Sending of the message failed. Unable to encrypt message. Please check that you have a valid email certificate for each recipient. Please check that the certificates specified in Mail & Newsgroups Account Settings for this mail account are valid and trusted for mail."
I tried to encrypt message to myself (i.e. sender and receiver are same). I used Thunderbird 91.8.1 (64-bit) at Windows 10 64-bit PC.
The smart card applet has implemented pkcs11 interface.
I could sign email message (S/MIME) using the same ECC NIST P-256 key (with same X509 certificate) successfully.
Does Thunderbird support encryption of SMIME email message using Elliptic Curve Cryptography (for example: ECC NIST P-256 or ECC NIST P-521)?
If so what I need to set up in Thunderbird in order to have enabled SMIME message encryption using Elliptic Curve Cryptography.
Thank you in advance!
Alla svar (1)
I'd suggest to post your question to the Topicbox Thunderbird e2ee mailing list. https://thunderbird.topicbox.com/groups/e2ee