{ Analytica Model Example_of_Encrypt_and_Decrypt, encoding="UTF-8" }
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Model Example_of_Encrypt_and_Decrypt
Title: Example of Encrypt and Decrypt
Description: This illustrates a simple usage of Encrypt and Decrypt. Note that we have imported from the Crypto namespace.
Author: Lonnie Chrisman, Ph.D.~
Lumina Decision Systems
Date: Tue, Sep 22, 2026 9:44 AM
DiagState: 2,0,1,1447,558,17,10
WindState: 2,98,82,720,350
FontStyle: Arial,15
FileInfo: 0,Model Example_of_Encrypt_and_Decrypt,2,2,0,0,W:\Testmodels\Example of Encrypt and Decrypt.ana
{!60500|NamespaceImports: Crypto}
{!70104|Att_GUID: d8dd5193-e6f1-400c-a4c7-7bac92071a36}

Index I
Title: I
Definition: 1..100
NodeLocation: 160,96,1
NodeSize: 64,24

Variable bytes
Title: bytes
Description: A randomly generated array of integer byte values (0–255), one for each element of index I; used as the plaintext binary payload.
Definition: Random(Uniform(0,255,integer:true,over:I))
NodeLocation: 320,96,1
NodeSize: 64,24
ValueState: 2,466,211,416,303,,MIDM

Variable blob
Title: blob
Description: The binary payload created by packing the byte array into an in-memory binary value.
Definition: WriteBinaryFile("<>",bytes,I,bytesPer:1,typeFlags:1)
NodeLocation: 488,96,1
NodeSize: 64,24
ValueState: 2,148,154,416,303,,MIDM

Variable key
Title: key
Description: A newly generated encryption key, used to encrypt and decrypt the example data.
Definition: EncryptionKey()
NodeLocation: 320,184,1
NodeSize: 64,24
ValueState: 2,260,266,416,303,,MIDM

Variable Encrypted_blob
Title: Encrypted blob
Description: The binary blob sealed with the key using authenticated encryption, encoded as base64 text for convenient display or storage.
Definition: Encrypt(blob,key,format:'base64')
NodeLocation: 488,184,1
NodeSize: 64,24
ValueState: 2,292,298,986,251,,MIDM

Variable Decrypted
Title: Decrypted
Description: The original binary blob recovered by decrypting Encrypted blob with the same key.
Definition: Decrypt(Encrypted_blob, key)
NodeLocation: 488,256,1
NodeSize: 64,24
ValueState: 2,324,330,416,303,,MIDM

Variable Exploded_bytes
Title: Exploded bytes
Description: The decrypted binary blob unpacked back into its individual byte values along index I.
Definition: GetFromBinaryData(Decrypted, bytesPer:1, typeFlags:0, resultIndex:I)
NodeLocation: 664,256,1
NodeSize: 64,24
ValueState: 2,356,362,416,303,,MIDM

Variable same_blob_
Title: same blob?
Description: True when the decrypted value exactly matches the original binary blob, confirming successful round-trip encryption and decryption.
Definition: blob=Decrypted
NodeLocation: 672,184,1
NodeSize: 64,24
ValueState: 2,340,346,416,303,,MIDM

Objective Correctly_recovered_
Title: Correctly recovered?
Description: A sanity check -- did we recover the original data?
Definition: Min(Exploded_bytes=bytes,I)
NodeLocation: 664,344,1
NodeSize: 64,24
WindState: 2,608,416,720,350
ValueState: 2,372,378,416,303,,MIDM

Variable Some_text
Title: Some text
Description: Example plaintext used to demonstrate encrypting and recovering ordinary text.
Definition: "Now is the time for all good men to come to the aid of their country"
NodeLocation: 328,432,1
NodeSize: 64,24

Variable Encrypted_text
Title: Encrypted text
Description: The example text sealed with the key using authenticated encryption in its native encrypted-value format.
Definition: Encrypt(Some_text, key)
NodeLocation: 496,432,1
NodeSize: 64,24
ValueState: 2,132,138,416,303,,MIDM

Variable Recovered_text
Title: Recovered text
Description: The original example text recovered by decrypting Encrypted text with the same key.
Definition: Decrypt(Encrypted_text,key)
NodeLocation: 672,432,1
NodeSize: 64,24
ValueState: 2,148,154,944,167,,MIDM

Variable Encrypted_text2
Title: Encrypted text2
Description: The example text sealed with the key and encoded as base64 text, suitable for text-only storage or transfer.
Definition: Encrypt(Some_text, key, format:'base64')
NodeLocation: 496,496,1
NodeSize: 64,24
ValueState: 2,100,106,416,303,,MIDM

Variable Recovered_text1
Title: Recovered text
Description: The original example text recovered by decrypting the base64-encoded encrypted text with the same key.
Definition: Decrypt(Encrypted_text2, key, format:'base64')
NodeLocation: 672,496,1
NodeSize: 64,24
ValueState: 2,116,122,416,303,,MIDM

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