Generating certificates with let's encrypt

I've started using the new CA named let's encryptduring their closed beta back in november.

At that time, I've been using their own (python-based) client to generate test certificates on my laptop (I've never planned to run the client on my servers as I don't really like having such …

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Creating self-signed SMIME certificate

With all the cryptocalypse news from the last months the question of the trust in the CA's becomes relevant : why should I trust a well-known CA rather than operating my own ?

The advantage of the usual method is clear : the CA is already included in the certificate stores of the …

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(k)GPG errors

Since end of november kgpg was throwing errors popup when starting, root cause being gpg issues :

gpg: Oops: keyid_from_fingerprint: no pubkey
tru::1:1416945128:1423745807:3:1:5
rvk:::17::::::3FC732041D23E9EA66DDB5009C9DBC21DF74DC61:80:
rvk:::17::::::19D03A15999E5DFEC360071E9420CF3BC2C08F9E:80:
rvk:::17::::::52064C78B5D875779B3691A2A891DD4308010A5F:80:
rvk:::17::::::23955BF5A6F0DC753B637DD11331DB747AFF2E92:80:

After longer …

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One more deception from Ubuntu

For my desktop, therre's some time I've left Ubuntu behind. I still use it on my servers, but I'm getting more and more deceived by those guys...

Last example : John the ripper not working.

The bug was filed 2012-10-26 and as of today is still not fixed - though I must …

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Generating huge quantities of random data

Before encrypting a disk it is recommended to fill it with random data to make prediction of encrypted blocks more difficult.

In practice this has become an issue with disks' capacity increasing - be it a SSD, with 120GB or a harddisk with 3TB : where to get such an amount of …

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Open LUKS container on remote server

This article presents a clever solution to unlock a LUKS encrypted root partition on a remote server.

The idea is to start a remote SSH server through which the key can be fed to the LUKS subsystem.

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Another way of managing passwords

Instead of storing your passwords, why not re-generate them each time you need them ? It's the concept behind passwordmaker.

Sounds good, question is how good is the implementation of the hashes, as the safety of the generated passwords is directly related to it.

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