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A short guide to the OpenBSD cryptographic tools (OpenSSL, swap encryption, partition encryption). Learn how to use OpenSSL to debug your SSL servers, how to use SSL certificates, encryption, and more! 1. Introduction. 2. Getting to Know OpenSSL. 2.1. Checking OpenSSL Version and Configuration. 3. Testing SSL Connections. 3.1. How fast is my computer? 3.2. How fast is that remote SSL server? 3.3. Faking it. 4. Running SSL-enabled Apache. 4.1. Testing Certificates with Apache. 4.2. Retrieving Remote Certificates. 4.3. Verifying the Certificate. 5. Working with Message Digests. 6. Base64-Encoding. 7. Encrypting and Decrypting Files. 7.1. Selecting the Right Cipher. 7.2. Encoding Encrypted Files. 8. Using OpenSSL to Generate Passwords. 9. OpenSSL Utility Commands. 9.1. Prime Number Testing. 9.2. Random Numbers. 10. OpenSSH Keys. 10.1. Generating OpenSSH Keys. 11. Encrypting the Swap Partition. 12. Encrypting Partitions.