decryption error with Anydesk

Carracido — Wed, 16 Jul 2025 07:23:54 GMT

Dear Community!

I´m trying to use Anydesk and it only works with decryption policy disabled, somehow the predefined exclusion for Anydesk is not working.

While checking the decryption logs I can see the following error:

"tlsv1 alert insufficient security. Received fatal alert InsufficientSecurity from server"

Does anyone have an idea the reason of this error? I couldn´t find anything about it and havent seen it before.

Thanks in advance.

Re: decryption error with Anydesk

kiwi — Wed, 16 Jul 2025 09:39:10 GMT

Hi @Carracido ,

The error in question strongly suggests an issue with TLS/SSL negotiation, specifically related to the strength of the encryption ciphers or protocols being used. In the handshake you should be able to see what ciphers/protocols are being negotiated.

I believe the following discussion provides a solution to bypass decryption for anydesk:
https://live.paloaltonetworks.com/t5/general-topics/solution-for-quot-ssl-decryption-bypass-for-anydesk-quot/td-p/385369/page/3

There was a different approach on reddit:
https://www.reddit.com/r/AnyDesk/comments/1jm1xjg/issue_with_palo_alto_ssl_decryption_not_liking/

Hope these help.

Kind regards,

-Kim.

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decryption error with Anydesk

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