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[85.71.35.39]) by smtp.gmail.com with ESMTPSA id z137sm18712372wmc.14.2021.08.08.12.48.04 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sun, 08 Aug 2021 12:48:04 -0700 (PDT) To: Peter Grandi , list Linux dm-crypt References: <1876586861.281618.1628426928218.ref@mail.yahoo.com> <1876586861.281618.1628426928218@mail.yahoo.com> <3999b2cc-c1da-a9ca-146b-ee457171f934@gmail.com> <24848.9698.412863.219395@cyme.ty.sabi.co.uk> From: Milan Broz Message-ID: Date: Sun, 8 Aug 2021 21:48:03 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.12.0 MIME-Version: 1.0 In-Reply-To: <24848.9698.412863.219395@cyme.ty.sabi.co.uk> Content-Language: en-US Message-ID-Hash: DL5N26JQW4UD5W2JSD3YQAEKDW7R5A2Q X-Message-ID-Hash: DL5N26JQW4UD5W2JSD3YQAEKDW7R5A2Q X-MailFrom: gmazyland@gmail.com X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; header-match-dm-crypt.saout.de-0; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; suspicious-header X-Mailman-Version: 3.3.2 Precedence: list Subject: [dm-crypt] Re: secure use of cryptsetup by non-root List-Id: List-Help: List-Post: List-Subscribe: List-Unsubscribe: Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit On 08/08/2021 20:43, Peter Grandi wrote: ... >> (It is tricky with only cryptsetup, but it is possible through >> using null cipher with block device.) > > That could be disabled by recompiling the kernel, not that it is > essential given the above. Then just setup an encrypted device with a known key and use userspace app to reverse it by running encrypt/decrypt operation. There are more tricks, it is not secure. Milan _______________________________________________ dm-crypt mailing list -- dm-crypt@saout.de To unsubscribe send an email to dm-crypt-leave@saout.de