GRNET/CERT @grnet_cert
@grnet_gr 's Computer Emergency Response Team | AB28 2D0F 0168 8D29 38E5 470A EF9B CF8F 79CD 0710 cert.grnet.gr Athens, Greece Joined March 2009-
Tweets424
-
Followers373
-
Following75
-
Likes75
tomorrow, with @alexkiousis, we will present at #SREcon the open source, cloud native platform we have developed @grnet_gr for running digital public services !
Δείτε την "Ανακοίνωση ΕΔΥΤΕ σχετικά με τις επιθέσεις στην Τράπεζα Θεμάτων" εδώ: grnet.gr/2023/06/03/ann…
join our team and help us design and operate large-scale systems using cutting edge technologies!
Στο πλαίσιο του Ευρωπαϊκού Μήνα Κυβερνοασφάλειας 🇪🇺🌐🔒🛡, ο #ΕΕΛΛΑΚ σε συνεργασία με την #ΕΔΥΤΕ διοργανώνουν 27/10 @ 10πμ το #webinar “Προστασία κρίσιμων δημόσιων υποδομών”. Εγγραφή και παρακολούθηση εδώ: ➡bit.ly/3CEvsMx #GRNET #cybersecurityMonth #cybersecurity
read all about CVE-2022-36436, the critical vulnerability we identified in the "Twisted VNC Authentication Proxy": cert.grnet.gr/en/blog/cve-20…
join the team!
τοποθέτηση για την αυξανόμενη τάση των κυβερνοεπιθέσεων στην εφημερίδα @ta_nea (Σαββατοκύριακο), 19/03/22.
Do you possess a thorough understanding of IT security concepts & knowledge of web technologies? Find out more on the opportunity to join our dynamic team here: bit.ly/3siY6ix #GRNET #ΕΔΥΤΕ #SecurityEngineer #ITSecurityEngineer #DigitalTransformation #Linux #Kubernetes
our team tries to enable @grnet_gr release secure services by performing successive assessments. Here are some statistics regarding the defects we identified in ’20 and ’21. Overall, ’21 was more productive as the scope of the services we examined was wider. On to the next one!
Reverse engineering Emotet: A detailed approach to protect GRNET against the trojan cert.grnet.gr/en/blog/revers… via @grnet_cert
we have been busy examining the Emotet trojan. Our analysis is now available in an extensive report! cert.grnet.gr/en/blog/revers… #Emotet #Malware #Security
join the team!
We are very happy to announce that as of #today GR-IX #route #servers drop #RPKI invalids for both #Athens & #Thessaloniki #GRIX #infrastructures. Thanks to our members for signing their ROA. #IXP #internet #peering #RPKI #poweredbyGRNET #GRNET
we have been setting up a test-bed to evaluate different Web Application Firewalls. To generate malicious traffic we are currently using @sqlmap, the "Nikto" Web server scanner and @kalilinux’s XSSer. Any other suggestions?
to address challenges (e.g. faster release pace, reliability) related to new services developed by @grnet, we opted for cloud native patterns and practices. Currently, through @kubernetesio we are managing multiple services running smoothly on our infrastructure! #K8s #DevOps

Yiorgos Adamopoulos @hakmem
2K Followers 3K Following Reading AI Memo 239. Learned amateur. RT != endorsement. I run infrastructures and speak for myself. Bubblegum does not scale. @[email protected]
Alexander Sinno @SinnoAlexander
672 Followers 766 Following 🌐 Cyber Security | 🇱🇧 🇬🇷 Ο Ελληνολιβανέζος | Γεννήθηκα στη Μασατσούσεττς. Living in Holland 🇳🇱
ᴍɪᴄʜᴀʟɪs �... @Cyb3rMik3
4K Followers 3K Following SecOps, DFIR & CTI 🛡 | Microsoft Security #MVP, #KQL Threat Hunting 🏹 | Father 👭/Hasbund 👫/🍷&⌚️ enthousiast/Explorer ✈️ | Views my own.
Andreas Sfakianakis /... @asfakian
5K Followers 3K Following Tweets about Cyber Threat Intelligence | SANS #FOR578 Instructor | Speaker My tweets=my views. RTs ≠ endorsement. https://t.co/6zRhe2JRUj
Διομήδης Σπ... @DSpinellis
17K Followers 1K Following Καθηγητής στο Τμήμα ΔΕΤ του Οικονομικού Πανεπιστημίου Αθηνών. Account for Greek/Greece tweets. For English/IT tweets in English follow @CoolSWEng.
ΕΕΛΛΑΚ @eellak
9K Followers 5K Following Οργανισμός Ανοιχτών Τεχνολογιών(ΕΕΛΛΑΚ), κέντρο γνώσης και πλατφόρμα διαλόγου για τις ανοιχτές τεχνολογίες. English account @gfoss_en
Anass0x @Anass0x
3 Followers 189 Following
Georgios Alexopoulos @grgalex42
14 Followers 37 Following CS Phd candidate @ University of Athens https://t.co/CefVRXM0RB
jimcaptain @d_kapetanios
166 Followers 8K Following
Sikorski Arkadiusz �... @Sikorski_arQ
414 Followers 7K Following Security, Sys arch / *nix's ; 🏰آوادرخشش The Polish Pirate Party 🇵🇱🏴☠️ ; EU🇪🇺 Ex cathedra: 🏰🤌@google 👀🧮🔢? 🔑🛠️ .. ; noble: Bojno i Bujno !¡ :q
Κόμμα Πειρα... @PiratepartyGR
6K Followers 2K Following Για μια ανθρώπινη, δημοκρατική, δίκαιη κοινωνία. Υπέρ διαφάνειας και λογοδοσίας των Αρχών. https://t.co/SSRYDYaGqs Follow:https://t.co/sFvmEJuJnd
ENIGMA EUProject @EnigmaEuproject
884 Followers 5K Following ENIGMA is an Horizon Europe project addressed to achieve excellence in the protection of Cultural Goods and artefacts from man-made threats
perslab @perslab_auth
480 Followers 3K Following Laboratory of Photogrammetry and Remote Sensing - RSE. Aristotle University of Thessaloniki * Εργαστήριο Φωτογραμμετρίας και Τηλεπισκόπησης - ΤΑΤΜ.ΑΠΘ
Kiklo.eu @EuKiklo
554 Followers 3K Following @EUKIKLO is #spinoff company of #AUTH - Aristotle University of Thessaloniki, providing scientific #expertise and service to #innovative #technologies #products
Adem Hl hl @ademhlhl
39 Followers 254 Following
G.C.Kaponias @KaponiasG
0 Followers 411 Following
www.vouli.net @vasilios11
1K Followers 5K Following ΒΑΣΙΛΕΙΟΣ ΜΠΕΤΑΣ Έτος Ίδρυσης 1980 Hellenic Cypriot Press Agency Αντιπρόεδρος της Ένωσης Συντακτών Αθηναϊκού Τύπου,έτος ίδρυσηs το 1936
HELLUG @hellug
1K Followers 89 Following We moved to Mastodon and Bsky At https://t.co/YuovHwsjGZ and https://t.co/OZ2hRQhX5v Chat on https://t.co/FOyR7xyeju
gdim @gdim95
4 Followers 172 Following
Dimitris P. @dimitrisper_
0 Followers 103 Following
$(echo 'sleepy 😴 s... @zer0rest
86 Followers 129 Following I fiddle with bits 🌞&🌜 - CS Ugrad @ UTh 📚
GeoK.O. @geok_o
6 Followers 651 Following
KANENAS🎗️📟 @kanenas_gr
636 Followers 7K Following Hellas / --🇬🇷} #DevSecOps / Rvrse Engineering Master of Science in Engineering in Systems Engineering
IssueMakersLab @issuemakerslab
5K Followers 6K Following We are the IssueMakersLab / We operate as a non-profit intelligence organization just for fun / Researching North Korea's cyber warfare capabilities since 2008
Michalis Mountantonak... @mountantonakis
95 Followers 141 Following PhD in Computer Science. Winner of SWSA Dissertation Award 2020.
Vasilis Konstantiou @VKonstantiou
26 Followers 474 Following MSc student in Information Systems @Aueb. Motorcyclist, loves exercising. Interested in information security, cryptography, privacy and software dev.
Hafid Walid 🇵🇸�... @Simycob
11 Followers 270 Following Computer scientist, Developer, IT security guy, gamer
Anastasia Sarchosoglo... @An_Sarchosoglou
99 Followers 436 Following Γεωπόνος Επιστήμης Τροφίμων MSc, MEd Εκπαιδεύτρια Ενηλίκων
AUEB @AUEB
5K Followers 2K Following Official Twitter feed of AUEB, the oldest university in Greece in the fields of Economics and Business Administration.
DATAWO @DATAWO_
210 Followers 460 Following A Non-Profit Organisation about gender-based violence and gender equality protection in the digital world. #genderbiases #genderandtechnology #womensrights
K KAT @KKATAGSEVEN
4 Followers 241 Following
Spyros Papageorgiou @pp_spyros
12 Followers 86 Following
MΞTΛΞXPL0ЯΞ @Meta_Explore
280 Followers 1K Following Security Researcher,Reverse Engineer and Programmer - Tweets are my own
ashish.k.bhandari @ashish_b988
100 Followers 3K Following I am ceo & founder for bhandari enterprises & soft business solution we have cctv camera,mobile jammer,currency counting machine,epbx,mobile currency
combinator @_combinator
6 Followers 454 Following
St @stvrsxz
3 Followers 100 Following
Eva Stathopoulou @eva_stath
8 Followers 122 Following
Ioannis Markantwnisio... @IoannisMarkan20
31 Followers 1K Following
CyberSecuritySalesMan @CSSalesMan
573 Followers 3K Following Cybersecurity sales-man. I sell the best cyber cyber stuff. Words of wisdom. The most in-depth analysis of the cyber-world. I failed my own Turing test.
Do what moves you @DWMY22
607 Followers 4K Following Blue team Defender ,Security Engineer ( Content Development) | KQL 🕵️♀️🙇♀️
Fatih @kaptankojiro
37 Followers 2K Following
AMELKI @AMELKI5
0 Followers 129 Following
cargious @cargious
0 Followers 49 Followinganestis karastergiou @akarastergiou
28 Followers 484 Following
Yiorgos Adamopoulos @hakmem
2K Followers 3K Following Reading AI Memo 239. Learned amateur. RT != endorsement. I run infrastructures and speak for myself. Bubblegum does not scale. @[email protected]
ΕΕΛΛΑΚ @eellak
9K Followers 5K Following Οργανισμός Ανοιχτών Τεχνολογιών(ΕΕΛΛΑΚ), κέντρο γνώσης και πλατφόρμα διαλόγου για τις ανοιχτές τεχνολογίες. English account @gfoss_en
ENISA @enisa_eu
53K Followers 909 Following Official Twitter channel of the European Union Agency for Cybersecurity (ENISA) 🇪🇺 | RTs ≠ endorsement
Bojan Zdrnja @bojanz
4K Followers 688 Following IT Security guy, penetration testing is my thing. One of the SANS Internet Storm Center handlers at https://t.co/KLxU4pooKI. SANS SEC542 instructor and course co-author.
Ioannis Stais @Einstais
683 Followers 588 Following IT Security Engineer & Director of Organization Security Testing @census_labs (Radio Callsign SV1TGF / 2020769) New Book! https://t.co/2pWnSmFUij…
Dimitris Kolotouros @kolotoor
39 Followers 44 Following IT Security Engineer @grnet_cert / @grnet_gr
Marios Levogiannis @_mlevogiannis
48 Followers 84 Following IT Security Engineer @grnet_cert / @grnet_gr
Eirini Degkleri @tardisWimey
35 Followers 69 Following
Nikos Kormpakis @nkorbbb
217 Followers 227 Following ~ Tech Lead, Site Reliability Engineering @ ΕΔΥΤΕ / GRNET / @grnet_gr ~ οpinions expressed are my own
Kali Linux @kalilinux
390K Followers 26 Following Kali Linux, The Most Advanced Penetration Testing Distribution. Ever. @[email protected]
sqlmap @sqlmap
13K Followers 2 Following ERROR 1062 (23000): Duplicate entry 'DA3BCB630536A3D32BC8DB4ADB4DE1A0' for key 'group_key'
AbuseIO @AbuseIO
129 Followers 130 Following AbuseIO is a community-driven project and open source toolkit to receive, process, correlate and notify about abuse reports received by network operators.
ACM CCS 2025 @acm_ccs
6K Followers 0 Following ACM Conference on Computer and Communications Security
Hacker News Bot @newsycombinator
229K Followers 2 Following Get the latest from Hacker News! Top 5 stories on the hour, every hour. By @riklomas from @superhi_ – unofficial and not affiliated with Y Combinator
GRIX @GRIXsocial
372 Followers 312 Following The goal of Greek Internet Exchange (GR-IX) is to improve connectivity, quality and speed of the Internet in Greece whilst minimizing the costs of accessing it.
USENIX Security @USENIXSecurity
12K Followers 146 Following USENIX Security '23 is SOLD OUT. The event has reached maximum physical capacity, and we will not be able to accommodate any additional registrations.
IEEE S&P @IEEESSP
9K Followers 0 Following Since 1980, the IEEE Symposium on Security and Privacy has been the premier forum for presenting developments in computer security and electronic privacy.
SecurityPrivacyMag @securityprivacy
2K Followers 200 Following IEEE Security & Privacy magazine provides research articles, case studies, tutorials, and columns for the information security industry.
Yannis Mitsos @ymitsos
307 Followers 275 Following Embedded in operations. Opinions expressed are my own.
LWN.net @lwnnet
16K Followers 0 Following http://t.co/CuIDGv8dj9 is the definitive web site for news from and about the Linux and free software development communities.
Diomidis Spinellis @CoolSWEng
7K Followers 1K Following Professor of software engineering @AUEB & Analytics @TUDelft, programmer, technology author. (Tech tweets here. Follow @DSpinellis for Greek/Greece tweets.)
GRNET @grnet_gr
4K Followers 605 Following Advanced Digital Technologies for Public Administration, Education, Research, Health and Culture.
GRNET/GRE @grnet_gre
652 Followers 73 Following @grnet_gr 's Reliability Engineering (GRE) directorate. Responsible for the reliable operation of GRNET's entire infrastructure.
Steven M. Bellovin @SteveBellovin
10K Followers 289 Following Author of "Thinking Security" https://t.co/ihsHfv1eFK…. Dinosaur photographer. He/him. Now on Mastodon.
Dimitris Mitropoulos @d1m1tr0
309 Followers 264 Following Assistant Professor @uoaofficial. Head of reliability engineering @grnet_gr
CERT/CC @certcc
4K Followers 0 Following CERT Coordination Center at the Carnegie Mellon University Software Engineering Institute.
CERT-UK @CERT_UK
6K Followers 25 Following UK national CERT and home to CiSP, the Cyber-security Information Sharing Partnership
Q-CERT الفريق �... @QatarCERT
4K Followers 21 Following كيوسرت - الوكالة الوطنية للأمن السيبراني. يقدم الفريق خدمة الاستجابة للحوادث السيبرانية: 📩 [email protected] 📞 16555
AUSCERT @AusCERT
8K Followers 573 Following AU's pioneer Cyber Emergency Response Team, proudly part of UQ. We help our members prevent, detect, respond and mitigate cyber-based attacks. RTs ≠ endorsement
HELLUG @hellug
1K Followers 89 Following We moved to Mastodon and Bsky At https://t.co/YuovHwsjGZ and https://t.co/OZ2hRQhX5v Chat on https://t.co/FOyR7xyeju
Anestis Bechtsoudis @anestisb
953 Followers 293 Following InfoSec Engineer @census_labs - Driven by passion for challenges
Nectarios Koziris @nkoziris
1K Followers 889 Following Professor, frmr Dean of the School of ECE@NTUA, affiliated@ICCS. Working with large scale computer systems. Founder of the Synnefo project (https://t.co/bZiRDrkTRq).
konstantinos grammat @dinosgramma
102 Followers 169 Following Λάτρης λιστών κάθε τύπου (ταινίες, μουσική, βιβλία, κρασιά κτλ) αγωνία για την ανακάλυψη του φάρμακου για την επέκταση της ημέρας πέρα των 24 ωρών
Stelios Sartzetakis @ssartz
381 Followers 1K Following I need a brand new friend who doesn't bother me / I think that somebody's near / I'm sure that someone is following me / "Hyacinth House"
Virus Bulletin @virusbtn
60K Followers 1K Following Security information portal, testing and certification body. Organisers of the annual Virus Bulletin conference. @[email protected]
Rapid7 @rapid7
123K Followers 3K Following Cybersecurity pros: Rapid7 lets you command your attack surface, smash silos, stay steps ahead of attackers, and take breaches from “inevitable” to preventable.
Cisco Security @CiscoSecure
369K Followers 1K Following Cisco is innovating for a new era of #security. Our unified, AI-driven, cross-domain security platform delivers better efficacy, experiences, and economics.
attackresearch @attackresearch
19K Followers 277 Following Attack Research (AR) is a boutique security firm located in Northern New Mexico specializing in advanced information security.
Threatpost @threatpost
212K Followers 6K Following Threatpost is the first stop for fast-breaking security news, conversations and analysis from around the world.
Bitdefender @Bitdefender
114K Followers 3K Following Award-winning cybersecurity you can trust and rely on.
Leonidas Poulopoulos @leopoul
311 Followers 337 Following
Threat Intelligence @threatintel
114K Followers 372 Following Symantec's researchers bring you the latest threat intelligence from the IT security world.
Sophos X-Ops @SophosXOps
73K Followers 323 Following A task force composed of our SophosLabs, SecOps, and SophosAI teams working together towards one goal: protecting our customers.
The Hacker News @TheHackersNews
932K Followers 2K Following The #1 trusted source for cybersecurity news, insights, and analysis — built for defenders and trusted by decision-makers.
Exploit Database @ExploitDB
219K Followers 9 Following The Exploit Database – ultimate archive of #Exploits, #Shellcodes & Security #Papers/#eZines