key – Page 4 – WindowsTechs.com

Can someone with access to only my Yubikey gain access to my server that has SSH access via an ED25519-sk keypair?

Posted on May 8, 2023 by angryserver

My understanding is that an ED25519-sk SSH key generated by OpenSSH generates a private key stub that lives on your host machine. This stub is just a reference to the actual private key that lives on the actual hardware key itself.
My unde… Continue reading Can someone with access to only my Yubikey gain access to my server that has SSH access via an ED25519-sk keypair?→

How do you know what KDF was used to protect an SSH-Key?

Posted on April 20, 2023 by John Nemo

Assuming I have found several OpenSSH private keys on my client’s system, how can I detect (at scale) which of them are:

completely unprotected (i.e. no passphrase)
using an old hashing algorithm for the passphrase (I read somewhere that … Continue reading How do you know what KDF was used to protect an SSH-Key?→

Detecting signal amplification attacks against PKE keyless fobs

Posted on March 30, 2023 by CuriousTechie

During the early hours of the morning there was an attempt to enter and presumably steal various vehicles on my street, detected well after the fact via householders reviewing CCTV motion detection alerts. There is only ever one person i… Continue reading Detecting signal amplification attacks against PKE keyless fobs→

Security Vulnerabilities In Modern Cars Somehow Not Surprising

Posted on March 2, 2023 by Bryan Cockfield

As the saying goes, there’s no lock that can’t be picked, much like there’s no networked computer that can’t be accessed. It’s usually a continual arms race between attackers and …read more Continue reading Security Vulnerabilities In Modern Cars Somehow Not Surprising→

Translating and Broadcasting Spoken Morse Code

Posted on January 25, 2023 by Bryan Cockfield

When the first radios and telegraph lines were put into service, essentially the only way to communicate was to use Morse code. The first transmitters had extremely inefficient designs by …read more Continue reading Translating and Broadcasting Spoken Morse Code→

How to compute key size for given resistance? [closed]

Posted on January 22, 2023 by xor

Determine the size of the key required (in bits) in order to ensure that on average it will take longer than 10 years to successfully perform a brute-force decryption of a file, assuming that one key can be tested in 107 seconds and that 1… Continue reading How to compute key size for given resistance? [closed]→

All Your Keys Are Belong to KeyDecoder

Posted on January 22, 2023 by Navarre Bartz

An illustration of a key sitting on an ID card. The key is light grey and the ID card is a darker grey gradient. The ID card says ID-1 Card 85.60 by 53.98 mm

Physical security is often considered simpler than digital security since safes are heavy and physical keys take more effort to duplicate than those of the digital persuasion. [Maxime Beasse and …read more Continue reading All Your Keys Are Belong to KeyDecoder→

Is my PGP key which I uploaded to sync.net compromised?

Posted on January 6, 2023 by SOMEONE

I just accidentally uploaded my PGP key in unencrypted format to rsync.net. As far as I know, nobody but me has access to the account. Is my key compromised?

Continue reading Is my PGP key which I uploaded to sync.net compromised?→

How do I securely send a symmetric key between two clients? [duplicate]

Posted on December 9, 2022 by Tiny Tim

I’m new to cryptography. I’m using Swift CryptoKit and I’ve figured out how to seal the data with a symmetric key. Now I can send the sealed data to another user, but they wouldn’t be able to decrypt it without the key. But if someone were… Continue reading How do I securely send a symmetric key between two clients? [duplicate]→

Encryption key fuzzing for forensics analysts

Posted on November 19, 2022 by R-Rothrock

I’m trying to make a simple encryption tool for Debian-like systems. I would simply hash a password, use it to lock/unlock a file, and it would never be stored on the drive. My dad threw out the idea that a randomly generated hash-like str… Continue reading Encryption key fuzzing for forensics analysts→