A public-key infrastructure (PKI) is a set of hardware, software, people, policies, and procedures needed to create, manage, distribute, use, store, and revoke digital certificates. In cryptography, a PKI is an arrangement that binds public keys with respective user identities by means of a ...

learn more… | top users | synonyms (1)

4
votes
1answer
125 views

Centralized key management for IOS and Android Code Signing

What is the best way for an enterprise to manage code signing certificates? The default seems to be that Apple and Android keys get stored by each developer on their machines. I see systems like ...
2
votes
1answer
100 views

Generating shared secret key using existing receivers public key and senders private key

I have the public key of the receiver, and the private key of the sender. I want to generate a new key by using the receivers public key and senders private key (also known as the signing key) to ...
2
votes
1answer
286 views

How CERT.rsa is interrelated with PackageInfo signatures

I am a newbie in security and cryptography, but I am developing Android applications and now wanna to dive deeper into the Android security mechanisms. I am trying to understand how CERT.rsa (as I ...
1
vote
1answer
94 views

Can Passpoint X.509 certificates be used to MITM SSL connections on Passpoint networks?

Passpoint/Hotspot 2.0 public networks like LinkNYC require users to install X.509 certificates, for EAP authentication. Can these certificates be used by the provider to execute man-in-the middle ...
1
vote
1answer
117 views

PKI management with easy-rsa

I recently setup an OpenVPN server with easy-rsa and have questions about certificate revocation: In the event that someone's private key gets compromised and I have to revoke the certificate with ...
0
votes
1answer
26 views

Firefox refuses to use X509 certificate, complaining “Cound not verify this certificate for unknown reasons”

I stumbled upon this question and answer. I have the same problem as the OP, and am sorry to report that the proposed answer does not resolve it. Certificate in question has been verified by OpenSSL-1....
0
votes
1answer
33 views

PKCS #11 with the TPM

I try to understand PKCS #11 Standard. I found this link. There is this picture. So this picture is in the case of the Trusted Platform Module(TPM). We have the SRK which encrypts with the Private ...
0
votes
1answer
48 views

X509 / SSL certificates in practise

After learning the theory behind cryptography I'm having quite some problems understanding how SSL or X509 certificates works in practise and I simply cannot find useful information in the internet. ...
0
votes
1answer
49 views

Whatsapp encryption: are the public keys requested from the server every new message or only at session setup?

I was reading trough Whatsapp white paper (and all related questions here) and couldn´f find an answer to this question: are the public keys for the recipient requested by the sender from Whatsapp ...
0
votes
1answer
331 views

How to get “Policy: X509v3 Any Policy” in a certificate generated with OpenSSL?

I am trying to generate a certificate through OpenSSL which has the following line X509v3 Certificate Policies: Policy: X509v3 Any Policy But I end up getting X509v3 Certificate Policies: ...
5
votes
0answers
141 views

Windows Certificate Services: Is it possible to enroll a SmartCard certificate AND have key archival?

I'm using ACOS5-64 Client Kit, I want to enroll for a certificate with key archival. I tried to do so by duplicating the SmartCard template and checked Archive subject's encryption private key option ...
3
votes
0answers
60 views

Will WinVerifyTrust return true for a file signed by a revoked certificate, before it was revoked?

I've seen mentions online that drivers that were signed by certificates that were later revoked are still trusted by Windows' driver integrity. Apparently if the file was signed before the revocation ...
3
votes
0answers
255 views

What are the use-cases for Hashicorp Vault PKI?

Hashicorp Vault has facility to auto generate server/client cert for authentication. https://vaultproject.io/docs/secrets/pki/index.html While it makes sense from certificate management point of view,...
3
votes
0answers
151 views

What is the openssl equivalent of using java's KeyPairGenerator?

I have been using java's KeyPairGenerator in order to generate public/private keys within a program so that I can encrypt and decrypt files(also using java encrypt/decrypt methods). I want to be able ...
2
votes
0answers
27 views

Finding the EMSA-PKCS1-v1_5 DigestAlgorithm field in the x509 certificate

From the RFC - https://www.ietf.org/rfc/rfc3447.txt A.2.4 RSASSA-PKCS1-v1_5 For each OID, the parameters field associated with this OID in a value of type AlgorithmIdentifier shall have a value ...
2
votes
0answers
142 views

How can I sign an rpm package using a smart card?

I have a smart card (not OpenPGP card), and I am preparing to sign an rpm using this card. After signing, I will get two files: my.rpm.sig, and my_id.cer. How can I sign my rpm using these extra ...
2
votes
0answers
127 views

CMS/PKCS#7: specifying signatureAlgorithm with digest?

I'm confused about algorithm selection for Cryptographic Message Syntax (a.k.a. CMS, PKCS#7) signed objects (RFC5652 Section 5.1). The SignerInfo structure (RFC5652 Section 5.3) has two separate ...
2
votes
0answers
283 views

Mitigating the risk of disabling EPA on ADFS

I'm currently investigating the deployment of an Active Directory Federation Services (ADFS) server for providing Single Sign-on for various services. By default, ADFS enables support for Extended ...
1
vote
0answers
38 views

Certificate based Access Control for Pub Sub messaging

I'm extending an existing p2p/master Pub Sub framework to support additional security measures, via over the wire encryption and topic based access control. I'd like to use the x.509 certificates that ...
1
vote
0answers
26 views

key hierarchy management and master key

Now, I have this equation, {{K_ab}K_bs}K_as. K_ab is encrypted by K_bs then whole packet is encrypted by K_as I think the key structure is K_as is the master key, K_bs is under K_as and K_ab is the ...
1
vote
0answers
59 views

Key Hierarchy and key Encryption

If i have two 56-bit DES keys, and I use these two key to encrypt a 256-bit AES key. Like this: K_AT encrypts K_BT and K_BT encrypts K What is the effective security of key K? Is it 2 X 56 Bits?
1
vote
0answers
49 views

find owner of private key

On one of the old dev servers I manage there is an RSA public and private key pair ~/.ssh/id_rsa.pub and ~/.ssh/id_rsa in a staging user account (used for automation and testing prior to production)...
1
vote
0answers
286 views

Certificate Transparency, TLS Extension method of serving SCT's

I was curious about how to supply certificate transparency from my web server. There are 3 ways certificate transparency information can be delivered to the client's browser (Source: http://www....
1
vote
0answers
31 views

Why do DNSKEY have a RRSIG for themselves?

Looking at all examlpes of DNSSEC, you see that the zone includes not only the DNSKEY , but also a RRSIG of the DNSKEY created with that same DNSKEY? Why is this? Why publish a self-signed RRSIG? What ...
1
vote
0answers
38 views

What are some scenarios I would use MSFT Certificate Enrollment Web Services?

The Certificate Enrollment Policy Web Service and the Certificate Enrollment Web Service are made for non domain connected machines to retrieve certificates of various kinds. When setting this up, I ...
1
vote
0answers
41 views

Security schemes regularly in use on cloud

I've been looking into how connections are managed in the cloud, in order to better understand the threats users and their deployments may face. The most important and common ones in use seem to be ...
1
vote
0answers
238 views

Distribute S/MIME public keys and CA cert for email security

I have my own CA. I want to distribute S/MIME certificates for 10 different users. I saw S/MIME keyservers from http://wiki.cacert.org/KeyServers, but I don't want to use public servers. What is the ...
1
vote
0answers
61 views

Use of RSA in Yaksha Security System

So I'm reading over the Yaksha Security System and see it is based on the RSA cryptosystem and a centralized server, easy enough. What I'm slightly confused on is the math behind the related keys. It ...
1
vote
0answers
126 views

Protecting data on a remote device

Background I have am developing a service which consists in a small headless client device (e.g. OLinuXino) which will contain sensitive data. The device will be plugged to a remote network (maybe ...
1
vote
0answers
35 views

Key management for hosting applications

We're looking to host a number of client applications in our environment. Some of those will use crypto, e.g. for ssl or database encryption and obviously we'll need to manage keys for that. I am ...
1
vote
0answers
218 views

1.3.6.1.5.5.7.1.12 Logotype extension - how can it be generated from openssl command line

If you look at this subCA Certificate from Verisign http://www.tbs-certificats.com/FAQ/en/495.html?p=en/495.html It has the following field 1.3.6.1.5.5.7.1.12: 0_.].[0Y0W0U..image/gif0!0.0...+......
1
vote
0answers
37 views

Looking for OpenSC compatibile token

I am currently proud user of Feitan ePass2003 with OpenSC, however it is not 100% reliable on Windows, on Linux it's just perfect. Anyway I started to looking and I have two candidates eToken Pro 64K ...
1
vote
0answers
591 views

Import securely RSA private key through PKCS#11

I have a cryptographic device that supports the following mechanisms: How I could securely import RSA private key into it? Because there is no support for wrap/unwrap using symmetric key is there ...
0
votes
0answers
6 views

Where partially homomorphic encryption schemes like BGN are used?

Schemes like Boneh, Goh, and Nissim are interesting, because of support of polynomially many additions and one multiplication. The algorithms are indeed simple https://eprint.iacr.org/2010/182.pdf ...
0
votes
0answers
45 views

TOTP: Storing symmetrical secrets

I'm in the process of researching 2fa methods for a cloud connected physical access control system. There is very little margin for error in this space. Is it just me or does TOTP for two factor auth ...
0
votes
0answers
35 views

Migrate a key with a TPM

I try to understand how TPM devices handle the migration of a key. So I found this link: shazkhan.files.wordpress.com (page 4-5) I think I have understood how the rewrap scheme functions, and now I ...
0
votes
0answers
20 views

Client blocking based on PKI

I've got following scenario: Own PKI in a private network Some webservers in the private network, accessed by load balancing via proxy from the web Now I'd like to block all clients their ...
0
votes
0answers
32 views

Use MDC to provide origin authentication for public key encryption?

Why can't we use an manipultation detection code (MDC) to provide origin authentication when using public-key encryption?
0
votes
0answers
40 views

Storing Keys on Embedded Devices

What is a reasonable way of storing private keys/certs on an embedded device that doesn't have trust-zone, TPM or write-once storage? Without hardware backing the key-storage the key must be stored in ...
0
votes
0answers
51 views

Digitally signing a digital signature

When might it make sense to digitally sign a digital signature?
0
votes
0answers
52 views

DSS digital signing approach

Under the DSS approach to digital signing, what is the advantage of using two pairs of keys for each signature?
0
votes
0answers
35 views

PKI, one sub CA for each certificate type VS one for all the certificates type

I'm trying to set a PKI where I can find 3 types of certificates: A client certificate to use in HTTPS communications A web server certificate to use in HTTPS communication A VPN certificate to use ...
0
votes
0answers
56 views

Mysql SSL handshake: symmetric key exchange with CA or server key?

I have my MySQL database set up to require server and client identify verification, with both presenting their certificates signed by the same CA (mysql user was set up with 'require X509'). ...
0
votes
0answers
90 views

Certificate policies extension in Root CA and Issuing CA

I am building new CA chain and PKI and I actually don't fully understand how I should include certificate policies (CP) and certificate practice statements (CPS) as extensions and how to work with it ...
0
votes
0answers
170 views

How to add a certificate chain to a JKS

I want to setup a KeyStore which contains certificate-chains only. This is required by a PKE system which uses the PublicKey of the desired certificate for encryption an then sends the cipher to the ...
0
votes
0answers
38 views

Distribution of key by server

I have read that in asymmetric cryptography, a system admin can generate key pairs on the server. After that, the users will be given the generated key pairs and this is an efficient way of doing this ...
0
votes
0answers
107 views

How should I organize my keys?

Suppose I have a set of computers with variegate level of trust (for example): I fully trust my own desktop pc at home I trust a bit also my smartphone, but I know it could be stolen I trust a bit ...
0
votes
0answers
431 views

Why is the public key extracted from the CSR different than the one extracted from the associated certificate?

I am playing around with pyopenssl. I am trying to extract the public key from a CSR and to check if it is the same than the one I find in the associated certificate. There is a small difference ...
0
votes
0answers
168 views

Public/Private key validation

Suppose I have this scenario: User --> Inputs License Key --> I validate it --> If success, good, move onto main window. If not, prompt the user to reenter the license key. The license key will not ...
0
votes
0answers
62 views

Breaking public key pinning

I was reading through the IETF's Public Key Pinning Extension for HTTP (http://tools.ietf.org/html/draft-ietf-websec-key-pinning-12). The acknowledgements section has the following: Thanks to Trevor ...