A-12
Cisco Security Appliance Command Line Configuration Guide
OL-10088-01
Appendix A Feature Licenses and Specifications
VPN Specifications
Cryptographic Standards
The security appliance supports numerous cryptographic standards and related third-party products and
services, including those shown in Table A-12.
Table A-12 Cryptographic Standards
Type Description
Asymmetric (public key) encryption algorithms RSA public/private key pairs, 512 bits to 4096 bits
DSA public/private key pairs, 512 bits to 1024 bits
Symmetric encryption algorithms AES—128, 192, and 256 bits
DES—56 bits
3DES—168 bits
RC4—40, 56, 64, and 128 bits
Perfect forward secrecy (Diffie-Hellman key
negotiation)
Group 1— 768 bits
Group 2—1024 bits
Group 5— 1536 bits
Group 7—163 bits (Elliptic Curve Diffie-Hellman)
Hash algorithms MD5—128 bits
SHA-1—160 bits
X.509 certificate authorities Cisco IOS software
Baltimore UniCERT
Entrust Authority
iPlanet/Netscape CMS
Microsoft Certificate Services
RSA Keon
VeriSign OnSite
X.509 certificate enrollment methods SCEP
PKCS #7 and #10
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