Secure file format

A file format for a secure file, comprising:

• a secure client header comprising:
• a client information block comprised of a public information block and a private information block, wherein at least a portion of the private information block is encrypted;
• and
• a client information block integrity check value appended to the client information block, the client information block integrity check value being obtained by performing an integrity check on the client information block;
• and
• a data block appended to ihe secure client header.

Computer-executable process steps for creating a secure file comprised of a secure client header and a data block, the executable process steps comprising the steps of:

• generating the secure client header, comprising the steps of:
• forming a client information block comprised of a public information block and a private information block;
• encrypting at least a portion of the private information block of the client information block;
• performing an integrity check onthe client information block to obtain a client information integrity check result value;
• and
• appending the client information integrity check result value to the client information block;
• and
• appending the data block to the secure client header to obtain the secure file.

A computer-readable medium on which are stored computer-executable process steps for creating a secure file comprised of a secure client header and a data block, the executable process steps comprising the steps of:

• generating the secure client header, comprising the steps of:
• forming a client information block comprised of a public information block and a private information block;
• encrypting at least a portion of the private information block of the client information block;
• performing an integrity check on the client information block to obtain a client information integrity check result value;
• and
• appending the client information integrity check result value to the client information block;
• and
• appending the data block to the secure client header to obtain the secure file.

A method of creating a secure file comprised of a client header and a data block, the method comprising the steps of:

• generating the client header;
• performing an integrity check on the client header so as to obtain a client header integrity check result value;
• appending the client header integrity check result value to the client header;
• generating the data block;
• encrypting the generated data block;
• dividing the encrypted data block into n encrypted data blocks;
• performing an integrity check on a first one of the n encrypted data blocks and the client header integrity check result value appended to the client header so as to obtain a first encrypted data block integrity check result value;
• appending the first encrypted data block integrity check result value to the first encrypted data block;
• and
• repeatedly performing, for each of the subsequent n encrypted data blocks, an integrity check on the subsequent encrypted data block and an integrity check result value appended to a previous one of the n encrypted data blocks, so as to obtain an integrity check result value for the subsequent encrypted data block, and appending the subsequent integrity check result value to the subsequent encrypted data block.

A file format for a secure file, comprising:

• a client header;
• a client header integrity check result value appended to the client header;
• and
• an encrypted data block,
• wherein, the encrypted data block comprises a plurality of encrypted data blocks each appended with its own respective integrity check result value, wherein the plurality of data blocks and their respective integrity check result values are obtained by (a) dividing the encrypted data block into n encrypted data blocks, (b) performing an integrity check on a first one of the n encrypted data blocks and the client information integrity check result value appended to the client information block so as to obtain a first encrypted data block integrity check result value, (c) appending the first encrypted data block integrity check result value to the first encrypted data block, and (d) repeatedly performing, for each of the subsequent n encrypted data blocks, an integrity check on the subsequent encrypted data block and an integrity check result value appended to a previous one of the n encrypted data blocks, so as to obtain an integrity check result value for the subsequent encrypted data block, and appending the subsequent integrity check result value to the subsequent encrypted data block.

Computer-executable process steps for creating a secure file comprised of a client header and a data block, the executable process steps comprising the steps of:

• generating the client header;
• performing an integrity check on the client header so as to obtain a client header integrity check result value;
• appending the client header integrity check result value to the client header;
• generating the data block;
• encrypting the generated data block;
• dividing the encrypted data block into n encrypted data blocks;
• performing an integrity check on a first one of the n encrypted data blocks and the client header integrity check result value appended to the client header so as to obtain a first encrypted data block integrity check result value;
• appending the first encrypted data block integrity check result value to the first encrypted data block;
• and
• repeatedly performing, for each of the subsequent n encrypted data blocks, an integrity check on the subsequent encrypted data block and an integrity check result value appended to a previous one of the n encrypted data blocks, so as to obtain an integrity check result value for the subsequent encrypted data block, and appending the subsequent integrity check result value to the subsequent encrypted data block.

A computer-readable medium on which are stored computer-executable process steps for creating a secure file comprised of a client header and a data block, the executable process steps comprising the steps of:

• generating the client header;
• performing an integrity check on the client header so as to obtain a client header integrity check result value;
• appending the client header integrity check result value to the client header;
• generating the data block;
• encrypting the generated data block;
• dividing the encrypted data block into n encrypted data blocks;
• performing an integrity check on a first one of the n encrypted data blocks and the client header integrity check result value appended to the client header so as to obtain a first encrypted data block integrity check result value;
• appending the first encrypted data block integrity check result value to the first encrypted data block;
• and
• repeatedly performing, for each of the subsequent n encrypted data blocks, an integrity check on the subsequent encrypted data block and an integrity check result value appended to a previous one of the n encrypted data blocks, so as to obtain an integrity check result value for the subsequent encrypted data block, and appending the subsequent integrity check result value to the subsequent encrypted data block.