Cisco asa 5505 key generator how to#
Cisco asa 5505 key generator serial#

Separate signing and encryption keys helps reduce exposure of the keys.

You can generate a general purpose RSA key pair, used for both signing and encryption, or you can generate separate RSA key pairs for each purpose.

For signature operations, the supported maximum key size is 4096 bits.

For the purposes of generating keys, the maximum key modulus for RSA keys is 2048.

SCEP enrollment supports the certification of RSA keys.

An RA is a server that acts as a proxy for the CA so that CA functions can continue when the CA is unavailable. Some CAs have an RA as part of their implementation. Revoked certificates are listed in a CRL, which each peer may check before accepting a certificate from another peer. Revoked certificates are not recognized as valid by other peers. When its certificate expires, the peer administrator must obtain a new one from the CA.Д¬As can also revoke certificates for peers that no longer participate in IPSec. The peer can continue sending its certificate for multiple IPSec sessions, and to multiple IPSec peers, until the certificate expires. This is called IKE with an RSA signature. This process works because each certificate encapsulates the public key for the associated peer and each certificate is authenticated by the CA, and all participating peers recognize the CA as an authenticating authority. Each peer sends its unique certificate which was issued by the CA. With a CA, a peer authenticates itself to the remote peer by sending a certificate to the remote peer and performing some public key cryptography. When the new peer attempts an IPSec connection, certificates are automatically exchanged and the peer can be authenticated. When a new peer is added to the network, you enroll that peer with a CA and none of the other peers need modification. When two peers attempt to communicate, they exchange certificates and digitally sign data to authenticate each other. When you use digital certificates, each peer is enrolled with a CA. Without digital certificates, you must manually configure each IPSec peer for every peer with which it communicates, and every new peer you add to a network would thus require a configuration change on every peer with which you need it to communicate securely. For VPN, the IKE protocol, a component of IPSec, can use digital signatures to authenticate peer devices before setting up security associations. For instance, most web browsers are configured with the root certificates of several CAs by default. Obtaining the public key of a sender is normally handled out-of-band or through an operation done at installation. This process relies on the receiver having a copy of the public key of the sender and having a high degree of certainty that this key belongs to the sender, not to someone pretending to be the sender. If the signature sent with the data matches the result of applying the public key to the data, the validity of the message is established. The receiver applies the public key of the sender to the data. The signature is attached to the data and sent to the receiver. In simple terms, a signature is formed when data is encrypted with a private key. The keys act as complements, and anything encrypted with one of the keys can be decrypted with the other. In public key cryptography, such as the RSA encryption system, each user has a key pair containing both a public and a private key.

Supported CA Servers About Public Key CryptographyДigital signatures, enabled by public key cryptography, provide a means to authenticate devices and users.

This section includes the following topics:

Certificate Configuration Public Key Cryptography.

This chapter includes the following sections: A CA can be a trusted third party, such as VeriSign, or a private (in-house) CA that you establish within your organization. A digital certificate also contains a copy of the public key for the user or device.

Cisco asa 5505 key generator serial#

Some of this information can include a name, serial number, company, department, or IP address. A digital certificate contains information that identifies a user or device. CAs are responsible for managing certificate requests and issuing digital certificates.

Cisco asa 5505 key generator how to#

This chapter describes how to configure certificates.

Configuring an External Server for Security Appliance User Authorization.

Managing Software, Licenses, and Configurations.

Configuring Tunnel Groups, Group Policies, and Users.

Configuring ARP Inspection and Bridging Parameters.

Applying Application Layer Protocol Inspection.

Configuring AAA Servers and the Local Database.

Configuring DHCP, DDNS, and WCCP Services.

Configuring Ethernet Settings and Subinterfaces.

Configuring Interfaces for the Cisco ASA 5505 Adaptive Security Appliance.

Getting Started and General Information.