S-63

S-63 is an International Hydrographic Organization (IHO) standard for encrypting and securing electronic navigational chart (ENC) data.

The Data Protection Scheme was prepared by the IHO Data Protection Scheme Advisory Group, and was based on the protection scheme developed and operated by Primar as part of providing their protected ENC service. ECC (Electronic Chart Centre) and United Kingdom Hydrographic Office were the original contributing organizations. [cite web | title=S-63 IHO Data Protection Scheme| work=International Hydrographic Organization | url=http://www.iho.int/PUBLICATIONS/download.htm#special | accessdate=2007-09-02] The standard was adopted as the official IHO standard by the IHO member states in December 2002. [cite web | title=IHO Circular Letter 66/2002 | work=International Hydrographic Organization | url=http://www.iho.int/MEM_STATES/circular_letters.htm | accessdate=2007-09-02]

The S-63 standard secures data by encrypting the basic transfer database using the Blowfish algorithm, SSL-hashing the data based on a random key and adding a CRC check. The standard also defines the systems to develop permit files that are delivered to end-users of ENC data enabling them to decrypt the data and use it for navigation. [cite web | title=S-63 IHO Data Protection Scheme| work=International Hydrographic Organization | url=http://www.iho.int/PUBLICATIONS/download.htm#special | accessdate=2007-09-02]

References