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Cryptography

How to use PyOTP to generate TOTP token from othpauth:// URL

Categories: Python, Cryptography
Uli Köhler

Uli Köhler

0 min read
How to generate argon2id hash on the command line using argon2

Categories: Cryptography
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Uli Köhler

0 min read
How to fix tpm2_ptool: Failed to open specified TCTI device file /dev/tpmrm0: Permission denied

Categories: Cryptography
Uli Köhler

Uli Köhler

2 min read
How to MD5-hash file in C++ using OpenSSL

Categories: C/C++, Cryptography
Uli Köhler

Uli Köhler

0 min read
How to compute SHA256 of std::string (hex or binary) using OpenSSL

Categories: C/C++, Cryptography
Uli Köhler

Uli Köhler

1 min read
How to export GPG public key to file using the command line

Categories: Cryptography
Uli Köhler

Uli Köhler

0 min read
How to fix OpenVPN 'failed to find GID for group openvpn'

Categories: Cryptography, Linux
Uli Köhler

Uli Köhler

0 min read
How to fix OpenVPN 'failed to find UID for user openvpn'

Categories: Cryptography, Linux
Uli Köhler

Uli Köhler

0 min read
How to generate Diffie-Hellman (DH) parameters using OpenSSL

Categories: Cryptography, Linux
Uli Köhler

Uli Köhler

1 min read
GPG symmetric encryption: Passphrase on command line

Categories: Cryptography
Uli Köhler

Uli Köhler

0 min read