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6.2 Providing Cryptographic Functionality

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Secure Cryptographic Storage Design
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1. 1. Only store sensitive data that you need
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1. 1. Use strong approved Authenticated Encryption
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  1. 1. 1. Use strong approved cryptographic algorithms
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  1. 1. 1. Use approved cryptographic modes
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  1. 1. 1. Use strong random numbers
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  1. 1. 1. Use Authenticated Encryption of data
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  1. 1. Store a one-way and salted value of passwords
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  1. 1. Ensure that the cryptographic protection remains secure even if access controls fail
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  1. 1. Ensure that any secret key is protected from unauthorized access
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    1. 1. Define a key lifecycle
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    1. 1. Store unencrypted keys away from the encrypted data
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    1. 1. Use independent keys when multiple keys are required
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    1. 1. Protect keys in a key vault
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    1. 1. Document concrete procedures for managing keys through the lifecycle
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    1. 1. Build support for changing algorithms and keys when needed
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    1. 1. Document concrete procedures to handle a key compromise
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    1. 1. Limit quantity of data encrypted with one key
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    1. 1. Follow applicable regulations on use of cryptography
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      1. Under PCI DSS requirement 3, you must protect cardholder data
      This article provides a simple model to follow when implementing solutions to protect data at rest.
      6.3 Password Storage Cheat Sheet
      1 Introduction
      2 Guidance https://www.owasp.org/index.php/Password_Storage_Cheat_Sheet#Guidance2.1 Do
      1. Do not limit the character set and set long max lengths for credentials
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      1. Use a cryptographically strong credential-specific salt
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      1. Impose infeasible verification on attacker
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        Leverage an adaptive one-way function
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        Leverage Keyed functions
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        Design password storage assuming eventual compromise
        6.4 Transport Layer
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        Introduction
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        Architectural Decision
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        Transport
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        Layer
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        Protection
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        Cheat
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        Sheet Providing Transport Layer Protection with SSL/TLS
        2.1 Benefits
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        Benefits
        Basic Requirements
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        SSL vs. TLS
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        When to Use a FIPS 140-2 Validated Cryptomodule
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        Secure Server Design
        2.5.1 Rule - Use TLS for All Login Pages and All Authenticated Pages
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        Use TLS on Any Networks (External and Internal) Transmitting Sensitive Data
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        Do Not Provide Non-TLS Pages for Secure
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        Content
        Do Not Mix TLS and Non-TLS Content
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        Use "Secure" Cookie Flag
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        Keep Sensitive Data Out of the URL
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        Prevent Caching of Sensitive Data
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        Use HTTP Strict Transport Security
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        Use Public Key Pinning
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        Server Certificate
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        Use Strong Keys & Protect Them
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        Use a Certificate That Supports Required Domain Names
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        Use Fully Qualified Names in Certificates
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        Do Not Use Wildcard Certificates
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        Do Not Use RFC 1918 Addresses in Certificates
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        Use an Appropriate Certification Authority for the Application's User Base
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        Always Provide All Needed Certificates
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        Be aware of and have a plan for the SHA-1 deprecation plan
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        Server Protocol and Cipher Configuration
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        Only Support Strong Protocols
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        Prefer Ephemeral Key Exchanges
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        Only Support Strong Cryptographic Ciphers
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        Support TLS-PSK and TLS-SRP for Mutual Authentication
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        Only Support Secure Renegotiations
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        Disable Compression
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        Test your overall TLS/SSL setup and your Certificate
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        Client (Browser) Configuration
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        Additional Controls
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        Extended Validation Certificates
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        Client-Side Certificates
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        Certificate and Public Key Pinning
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        Secure Internal Network Fallacy
        Providing Transport Layer Protection for Back End and Other Connections
        3.1 Secure Internal Network Fallacy
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        Transport Layer Protection Cheat Sheet
        Protocol and Cipher Configuration for Back End and Other Connections
        4 Tools
        4.1 local/offlines
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        Tools
        Learn More:
        OWASP Cryptographic Storage Cheat Sheet
        OWASP Password Storage Cheat Sheet
        OWASP Transport Layer Protection Cheat Sheet
        OWASP Testing Guide: Chapter on SSL/TLS Testing
        CWE Entry 310 on Cryptographic Issues
        CWE Entry 312 on Cleartext Storage of Sensitive Information
        CWE Entry 319 on Cleartext Transmission of Sensitive Information
        CWE Entry 326 on Weak Encryption