Tag Archives: Kriptografie

TLS Onderskepping Gedink het Van die Gevaarlike – Video En Skyfies

By | October 9, 2017

Op die jongste Chaos Kommunikasie Kamp ek het'n chat opsomming van die kwessies met TLS onderskepping of Man-in-die-Middel gevolmagtigdes. Dit was aanvanklik gemotiveer deur die voorkoms van Superfish en my eie ondersoeke op Privdog, maar ek het ontdek voor maand nou dat dit dalk'n veel groter nadeel. Ek gebruik om te wees verstom... Lees Meer »

Superfish 2.0: Harmful Certificates on Dell Laptops Breaks Encrypted HTTPS Connections

By | October 5, 2017

tl;dr Dell laptops come preinstalled with a root certificates and a corresponding personal key. That fully compromises the safety of encrypted HTTPS connections. I’ve supplied an online check, affected customers ought to delete the certificate. It appears that Dell hasn’t discovered something from the Superfish-scandal earlier this yr: Laptops from the corporate include a preinstalled… Lees Meer »

A Little POODLE Left in GnuTLS (old Versions)

By | October 5, 2017

tl;dr Older GnuTLS variations (2.x) fail to examine the primary byte of the padding in CBC modes. Numerous secure Linux distributions, together with Ubuntu LTS and Debian wheezy (oldstable) use this model. Present GnuTLS variations usually are not affected. A few days in the past an email on the ssllabs mailing list catched my consideration.… Lees Meer »

The Drawback with OCSP Stapling And Should Staple And Why Certificates Revocation Continues to Be Broken

By | October 5, 2017

Today the OCSP servers from Lets Encrypt have been offline for a while. This has precipitated way more hassle than it ought to have, as a outcome of in principle we’ve got all of the applied sciences out there to deal with such an incident. Nonetheless resulting from failures in how they’re carried out they… Lees Meer »

What Acquired Us Into the SHA1 Deprecation Mess?

By | October 5, 2017

Important notice: After I revealed this textual content Adam Langley pointed out that a main assumption is incorrect: Android 2.2 really has no issues with SHA256-signed certificates. I checked this myself and in an emulated Android 2.2 instance I used to be in a position to join with a website with a SHA256-signed certificates. I… Lees Meer »

Pwncloud Dangerous Crypto Within the Owncloud Encryption Module

By | October 5, 2017

The Owncloud net utility has an encryption module. I first turned conscious of it when a press launch was printed promoting this encryption module containing this: Imagine you’re an IT group utilizing business normal AES 256 encryption keys. Shall we say that a vulnerability is discovered within the algorithm, and also you now want to… Lees Meer »

How I Tricked Symantec with a Pretend Personal Key

By | October 5, 2017

Lately, some consideration was drawn to a widespread downside with TLS certificates. Many individuals are by accident publishing their personal keys. Typically they’re launched as a half of purposes, in Github repositories or with common filenames on net servers. If a personal key’s compromised, a certificates authority is obliged to revoke it. The Baseline Necessities… Lees Meer »

In Search Of a Safe Time Source

By | October 5, 2017

All our computer systems and smartphones have an inner clock and must know the present time. As configuring the time manually is annoying it’s normal to set the time by way of Web companies. What tends to get forgotten is that a fairly correct clock is usually an important a half of safety features like… Lees Meer »