Collaborate Disseminate
Firstly is it possible to determine which of the calculation/equation was performed last to derived the values of x and y of the public key?
The calculation used in deriving the public key from the private key involves the following steps:… Continue reading Can the private key be derived from the public key [duplicate]
I came across two ways of generating an ECC private key. Both create the key in pkcs8 format.
Only the 2nd variant results in a pkcs8 file that contains the eccPublicKey OID 1.2.840.10045.2.1.
Why do these two ways of generating the pkcs8 … Continue reading Difference in OpenSSL pkcs8 key generation
I’am trying to get a feel for Elliptic Curve Cryptography. I wrote a small Python program below to generate key material but I don’t get the same result for y_squared and Q.y^2. I’am using the parameters from 256-Bit Random ECP Group (RFC … Continue reading Elliptic Curve Cryptography Key Verification fails [migrated]
I’am trying to get a feel for Elliptic Curve Cryptography. I wrote a small Python program below to generate key material but I don’t get the same result for y_squared and Q.y^2. I’am using the parameters from 256-Bit Random ECP Group (RFC … Continue reading Elliptic Curve Cryptography Key Verification fails [migrated]
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?
Having issue with x509 certificate verification.
Steps I followed.
Generated the root certificate.
created the Intermediate certificate.
signed the Intermediate certificate with root certificate.
Signing was success.
verification failed…. Continue reading x509 certificate verification issue
CRL lists the revoked certificates of a CA by sending back to the user the Serial Number of each certificate, nothing related to the public key. I don’t know how it works for OCSP.
Is there a technical way on the CA side (beyond the organi… Continue reading How can I ensure that a CSR doesn’t rely on a revoked private key
It seems that Firefox and Chrome both support x25519 keys, but they do not accept keys signed using Ed25519. Am I correct?
If so, where can I find the official source of this information?
In the Windows Certificate Store, during a request creation, there are options given for the private key to be ECDH (Key Usage: keyAgreement) and for RSA for encryption only (Key Usage: keyEncipherment):
ECDH,Microsoft Software Key Storag… Continue reading Microsoft Software Key Storage Provider for ECDH (Key Usage: keyAgreement) and for RSA encryption (Key Usage: keyEncipherment)
The windows certificate store, during the creation of a request, gives the following options for the private key:
ECDSA_nistP384,Microsoft Software Key Storage Provider (KSP)
ECDSA_secP384,Microsoft Software Key Storage Provider (KSP)