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Christoph Kemetmüller
Blog
About
Blog
About
Cryptography
2026
Oct 25
eMudhra's CA keys fit in a byte, and curl and Node still trusted them
Byte
May 22
384 bit RSA DKIM Key
Byte
Jan 24
BREAKMEIFYOUCAN: Keyspace Reduction Attacks on NXP NFC Tags
Vulnerability
2025
Apr 18
Practical Known Plaintext Attack Against ZIP Files
Byte
Feb 24
SSH Protocol Flaw CVE-2023-48795 Terrapin Attack: All You Need To Know
Byte
2024
Nov 24
Matrix 2.0 moves login to OIDC and calls into the protocol
Byte
Nov 4
Kyber and Dilithium: Cryptography 101 with Alfred Menezes
Byte
Aug 17
Chinese backdoor in MIFARE Classic
Byte
Apr 18
CVE-2024-31497 - Biased ECDSA Nonces in PuTTY Client
Vulnerability
2023
Oct 24
Encrypted traffic interception on Hetzner and Linode
Byte
Feb 17
How ransomware encrypts files, per ATT&CK T1486
Byte
Jan 20
Palant picks apart LastPass's breach statement and iteration counts
Byte
2022
Dec 23
Hackers stole encrypted LastPass password vaults
Byte
Dec 3
Charles V's encrypted 1547 letter decrypted after almost 500 years
Byte
Nov 1
CVE-2022-3602 - OpenSSL email address overflow downgraded to High
Vulnerability
Nov 1
CVE-2022-3602 - Critical OpenSSL 3.0.x security fix announced
Vulnerability
Aug 23
Software developer cracks Hyundai car security with Google search
Byte
Aug 12
CVE-2022-20866 - Cisco ASA and FTD can leak RSA private keys
Vulnerability
Jul 15
NIST picks Kyber, Dilithium, FALCON and SPHINCS+ for post-quantum crypto
Byte
Jun 27
CVE-2022-2274 - OpenSSL 3.0.4 RSA memory corruption on AVX-512 CPUs
Vulnerability
Jun 14
CVE-2022-24436 - Hertzbleed: frequency scaling as a remote timing side channel
Vulnerability
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