Collaborate Disseminate
There are plenty of instructions for converting PEM certificates to DER which also pop up when looking for ways to convert public keys.
These are among the options offered:
openssl x509 -in cert.pem -out cert.der
openssl rsa -in cert.pem -… Continue reading converting just a public key from PEM to DER using openssl
Is there a scheme that let people derive public/private key pair from arbitrary secrets?
As you may know, digital signature schemes have versatile use cases. The problem is, the key pair handling is too difficult for end-users. On the othe… Continue reading Deriving digital signature key pair deterministically from an arbitrary secret
First of all, is my understanding correct that primary keys and subkeys are all key pairs consisting of a private and a public key?
I get the rationale behind using primary keys and subkeys1, and why one should keep the private primary key… Continue reading How securely should one treat their primary public key?
Frankly, I wasn’t sure whether this belongs in crypto.stackexchange.com or here, so forgive me. I’ve been going through a book where in one of the chapters the author tries to illustrate public key cryptography by imagining a "four-st… Continue reading Understanding public key cryptography example
I recently started using a VPS hosting service, that offers unmanaged VPS. It allows me to reinstall the VM at any point in time, choosing from a number of OS ISO files (doesn’t have to be the same OS as before). You are probably already f… Continue reading VPS host shows plain text "root" account password upon reinstall of unmanaged VM
According to the man page, ssh by default sends multiple public keys from files in the ~/.ssh folder, one by one, until authentication success. Does that mean that the server side could know multiple (possibly all of) the client’s public k… Continue reading ssh and anonymity?
I’m wondering why trust management is essential to PGP public-key rings?
and what relationships between the four fields of a public-key ring:
Owner Trust
Key Legitimacy
Signature(s)
Signature Trust(s)
Continue reading Why is trust management essential for Pretty Good Privacy (PGP) key rings?
I am re-writing a Java application with NodeJS. I need to encrypt a message using these parameters but I cannot get it work.
{
"oaepHashAlgo": "SHA256",
"pubKeyIndex": "0004",
"Sid":… Continue reading How to use OAEP encrypt data with this public key
I am trying to verify a signature using OpenSSL in C++. The code is below:
bool verifySignature(QString updateInfo_file_signature, QString uInfo_file_hash) {
RSA *rsa = NULL;
BIO *keybio;
FILE *file = fopen("pubkey.pem&qu… Continue reading error:0407008A:rsa routines:RSA_padding_check_PKCS1_type_1:invalid padding openssl C++
I am trying to verify a signature using OpenSSL in C++. The code is below:
bool verifySignature(QString updateInfo_file_signature, QString uInfo_file_hash) {
RSA *rsa = NULL;
BIO *keybio;
FILE *file = fopen("pubkey.pem&qu… Continue reading error:0407008A:rsa routines:RSA_padding_check_PKCS1_type_1:invalid padding openssl C++