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• November 16, 2011
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Thank you for your interest! I appreciate any feedback and constructive criticism.

If you would like to establish contact with me, please read the information below. Unfortunately, a guaranteed answer cannot be given.

All of my emails are cryptographically signed with PGP/MIME or a separate signature. Without exception, I never send any unsigned email. Signatures must be verified, with GnuPG (GNU Privacy Guard, www.gnupg.org, MS-Windows version: www.gpg4win.org), for example. I only use the key with the listed data. PeterJockisch.de is the only official source for obtaining my key.

To view a name and a cryptographical checksum, is not sufficient. For the authentication, the signature must be verified. After the initial activation, modern email agents fully and automatically verify in the background.

For the qualified electronic signature, most often, only hardware-based (chip card) class-3-certificates, certifiied by legally recognized CAs, are accepted by law. However, the required hardware and software infrastructure (available card readers, supported operating system, email agent, software) is throughout of proprietary nature. This means not checkable and visible and thus, risky under security aspects. If attached to your email, I naturally will use such public X.509- or OpenPGP certificates with my MUA – However, I myself do not sign with such certificates

Some recipients are not familiar with practical encryption and signing, or they have no possibility to use it in their country. In these cases, in addition to the signed email, I write the message seperately in a „.txt“ or „.pdf“ file and publicize it's checksum (SHA-1 or GOST) in the site blog section, combined with the date of dispatch, sending time and initials indicating the document.

For the verification, the checksum of the attached „.txt“- respective „“.pdf“-file has to be created first. You can then look in the blog section if there is an entry with a corresponding checksum for the concerned email sending day. There and only there are checksums of my emails publicized, nowhere else:

http://www.peterjockisch.de/blog_en/blog_en.html, IP: 213.133.104.22.

My email texts do not contain any data on the checksum. That would be completely senselessly. Everyone could write an arbitrary file and subsequently copy a checksum of the blog section into the email text.

SSL/TLS certified site sections will follow.

Principally, on a business level, I do not communicate by telephone which is unsuitable for proof of identity. Telephone information is principally not given. I do not own a mobile phone and deny respective contracts or offers.

Due to telephony being unsuitable for proof of identity and the high risk of impersonation, I only conduct phone calls with immediate family using landline network only. I principally do not use mobile telephony, SMS and fax.

I neither have representatives, nor assistants nor employees who speak for me. This will not change in the future. I do not offer any job.

None of my websites sends advertising emails.

I principally do not write reader's letters, and do not send any advertising emails, advertising letters, or newsletters. Current news and notifications can be obtained via RSS news tickers and can be read in news sections publicized on my official websites.

All information are offered exclusively "passive" on my own official websites, which can be seen in the imprint.

I neither use Twitter nor Facebook nor Myspace or other similar services.

All websites recommended by me are exclusively listed on PeterJockisch.de, ComputerBildnis.com and PeterJockisch.com. I do not practise banner exchange.

I do not offer any product or services at all; ComputerBildnis.com will be financed solely through the placement of advertisements on the websites.

I solely publicize on websites whose domains I own. My webhoster is Hetz­ner On­line AG, http://www.hetzner.de/en. All my websites and content are being publicized exclusively via this webhoster. Exceptions to this are only the german checksums article in the encyclopedia Knol and my You­tube-Ka­nal on which vegan recipes will be publicized in the future, but no portrait photos and no computer articles.