README.txt 2.3 KB

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  1. Java(TM) Cryptography Extension Policy Files
  2. for the Java(TM) Platform, Standard Edition Runtime Environment
  3. README
  4. ------------------------------------------------------------------------
  5. Import and export control rules on cryptographic software vary from
  6. country to country. The Java Cryptography Extension (JCE) architecture
  7. allows flexible cryptographic key strength to be configured via the
  8. jurisdiction policy files which are referenced by the "crypto.policy"
  9. security property in the <java-home>/conf/security/java.security file.
  10. By default, Java provides two different sets of cryptographic policy
  11. files:
  12. unlimited: These policy files contain no restrictions on cryptographic
  13. strengths or algorithms
  14. limited: These policy files contain more restricted cryptographic
  15. strengths
  16. These files reside in <java-home>/conf/security/policy in the "unlimited"
  17. or "limited" subdirectories respectively.
  18. Each subdirectory contains a complete policy configuration,
  19. and subdirectories can be added/edited/removed to reflect your
  20. import or export control product requirements.
  21. Within a subdirectory, the effective policy is the combined minimum
  22. permissions of the grant statements in the file(s) matching the filename
  23. pattern "default_*.policy". At least one grant is required. For example:
  24. limited = Export (all) + Import (limited) = Limited
  25. unlimited = Export (all) + Import (all) = Unlimited
  26. The effective exemption policy is the combined minimum permissions
  27. of the grant statements in the file(s) matching the filename pattern
  28. "exempt_*.policy". Exemption grants are optional. For example:
  29. limited = grants exemption permissions, by which the
  30. effective policy can be circumvented.
  31. e.g. KeyRecovery/KeyEscrow/KeyWeakening.
  32. Please see the Java Cryptography Architecture (JCA) documentation for
  33. additional information on these files and formats.
  34. YOU ARE ADVISED TO CONSULT YOUR EXPORT/IMPORT CONTROL COUNSEL OR ATTORNEY
  35. TO DETERMINE THE EXACT REQUIREMENTS.
  36. Please note that the JCE for Java SE, including the JCE framework,
  37. cryptographic policy files, and standard JCE providers provided with
  38. the Java SE, have been reviewed and approved for export as mass market
  39. encryption item by the US Bureau of Industry and Security.