These days I have learnt much more about how end-to-end encryption works, how Trust works and why Trust is so crucial when it comes to ensuring the genuineness of encryption and avoiding MITM attacks. To ensure the security of communications with my contacts, from today, a strengthened OMEMO Trust policy is applied to my future end-to-end encrypted communications on Jabber. TL;DR Please verify the OpenPGP message at the end of this article using my OpenPGP public key, and if the signature is valid, then trust these 8 fingerprints on your Jabber client:

This is my fourth poem concerning communication software freedom and privacy (see Free Software, Free Communication , Why the Fuck the Fucking Weixin Exists and Build Friendship, Not Censorship ), but what makes this poem special is that it also aims to express longing for one of my old friends, a girl who shared the same sweet memories with me. In 2023, she helped me a lot with my migration to libre software social and instant messaging services, such as Mastodon, Matrix and Jabber.

I have no prejudice against Gmail users, but these days my A/I mailbox frequently receives spam emails from Gmail addresses, commonly with no content or just one or two words or emojis. Therefore, I have to set mail filter rules for Gmail emails. Since today, if you use Gmail (username@gmail.com ) to send emails to me, you must satisfy one of the two requirements below: You encrypt your email using OpenPGP, and ensure that your subject is also encrypted; You use the string I_AM_NOT_SPAMMER as your subject; otherwise, your email will enter my spam box.

Due to the discontinuation of my carrier phone calls and SMS/MMS acceptance , I have kept all my IM apps’ notification settings on to ensure that everyone can contact me 24/7. However, these days phone notifications have been disturbing the classes, and things are getting worse recently. Therefore, I am going to enable the Do Not Disturb mode during classes, in that case notifications won’t produce a sound. In case of emergency, please contact me via the Jabber account czl-emergency@jabber.

Through efforts, my retro style personal website is now finally available on the clearnet! Please visit this link to have a look. My registration on another ~tilde server rw.rs is pending, and after my request is accepted, the site will be available on that server as well!

In a world of closed doors and coded chains, Where whispers are tracked and freedoms wane, Weixin and QQ—names carved in silence, Enforce secret rules with digital violence. They mask our chats in proprietary shrouds, Censor our truths beneath opaque clouds, Surveillance hidden behind glossy facades, Restricting voices, stifling the odds. Yet in the heart of the open, a revolution sings, Where Matrix and XMPP spread liberated wings— A network of friends, unbound and free,

Hello guys! I have just gained access to the ~tilde server tilde.club and become a part of the ~tilde community! At the same time, I also got a new email address from the community, and that is czl92783719@tilde.club . The new identity with the new email address has been added to my OpenPGP key, and the key has been uploaded to the OpenPGP keyserver. Feel free to download the new OpenPGP key from the keyserver!

Though my tilde.club request is still pending and the clearnet site is currently unavailable, the site is now accessible on I2P! It’s already available through the Base32 address xz5fs5yickd6wnikpjmck67yco52igj2zjns7y5wifjgcnfynrpq.b32.i2p now. The shorter address czllfs.i2p is available through the address helper and will be distributed to everyone’s address books in the following days.

In the digital realm where connections are made, Weixin emerges, a platform displayed. But why the fuck does this fucking app persist, When freedoms and privacy cease to exist? They fucking monitor each fucking word, Every fucking message, every sound heard. Censorship’s grip tightens the noose, Silencing voices with no fucking excuse. Proprietary chains disguised as threads, Binding our data, fucking with our heads. Harvesting info with each fucking click,

This article briefly introduces how my hardware and software is set up (as of 3/6/25). Regular Computers I own 3 laptops, one at home and two carried with me. All of them run free operating systems, without non-free firmware, drivers, and binary kernel blobs. czl92783719-PC1 This is my primary computer used for various tasks, such as programming, surfing the internet, and listening to music. Model: Lenovo ThinkPad X200 CPU: Intel(R) Core(TM)2 Duo P8600 (2) @ 2.