|  | 
| Type | Algorithm | Requirements | 
| Block Encryption | AES/3DES | REQUIRED | 
| Key Transport | AES-RSA-OEAP 3DES-RSA-v1.5 | REQUIRED | 
| MAC | AES/3DES with SHA1 | OPTIONAL | 
| Signature | XML Signature | OPTIONAL | 
| (Exclusive) Canonicalization | Canonical XML | OPTIONAL | 
| Compression et al | n/a | 
| 16 of 19 | 



