System for secure packet communication

A computer program product, comprising a computer readable storage device having a computer readable program code stored therein, said program code configured to be executed by a processor of a computer system to implement a method for processing a communication data item, said method comprising:

• dividing the communication data item into a plurality of unencrypted packets, said unencrypted packets being physically isolated from each other, a packet header and plaintext data being contained within each unencrypted packet, the packet header of each of said unencrypted packet comprising an identifier field that includes a packet identifier, the packet identifier being identical for all of said unencrypted packets;
• and
• generating an encrypted packet from each unencrypted packet by:
• determining a vector identifier from the identical packet identifier, said vector identifier having an association with the identical packet identifier;
• generating an initial vector from the vector identifier, said initial vector differing from the vector identifier;
• and
• forming an encrypted packet header, said forming the encrypted packet header comprising inserting the vector identifier into a first portion of the packet header and encrypting a second portion of the packet header through use of an encryption key, said first and second portions of the packet header being different portions of the packet header, said encrypting the second portion of the packet header being implemented through use of the initial vector,
• wherein said generated encrypted packets are physically isolated from each other.

A computer system comprising a processor and a computer readable physically tangible storage device coupled to the processor, said storage device containing computer readable program code that when executed by the processor implements a method for processing a plurality of encrypted packets, said method comprising:

• generating a decrypted packet from each encrypted packet of the plurality of encrypted packets, said decrypted packets being physically isolated from each other, said encrypted packets being physically isolated from each other, an encrypted packet header and encrypted data items being contained within each encrypted packet, the encrypted packet header of each encrypted packet comprising an encrypted portion (E0) and an identifier field that includes a vector identifier, said vector identifier being identical for all of said encrypted packets, said encrypted packets having been previously derived from a communication data item that comprised unencrypted packets respectively corresponding to the encrypted packets, said generating comprising for each encrypted packet:
• obtaining the vector identifier from the identifier field;
• ascertaining an initial vector from the obtained vector identifier, said initial vector differing from the vector identifier;
• decrypting E0 to form a decrypted data item D0;
• and
• performing an exclusive OR between D0 and the initial vector to form a decrypted packet header of the decrypted packet.

A computer program product, comprising a computer readable storage device having a computer readable program code stored therein, said program code configured to be executed by a processor of a computer system to implement a method for processing a plurality of encrypted packets, said method comprising:

• generating a decrypted packet from each encrypted packet of the plurality of encrypted packets, said decrypted packets being physically isolated from each other, said encrypted packets being physically isolated from each other, an encrypted packet header and encrypted data items being contained within each encrypted packet, the encrypted packet header of each encrypted packet comprising an encrypted portion (E0) and an identifier field that includes a vector identifier, said vector identifier being identical for all of said encrypted packets, said encrypted packets having been previously derived from a communication data item that comprised unencrypted packets respectively corresponding to the encrypted packets, said generating comprising for each encrypted packet:
• obtaining the vector identifier from the identifier field;
• ascertaining an initial vector from the obtained vector identifier, said initial vector differing from the vector identifier;
• decrypting E0 to form a decrypted data item D0;
• and
• performing an exclusive OR between D0 and the initial vector to form a decrypted packet header of the decrypted packet.